.rs
.\" Troff code generated by TPS Convert from ITU Original Files
.\"                 Not Copyright ( c) 1991 
.\"
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.EN
.nr LL 40.5P
.nr ll 40.5P
.nr HM 3P
.nr FM 6P
.nr PO 4P
.nr PD 9p
.po 4P

.rs
\v | 5i'
.sp 2P
.LP
\fBRecommendation\ F.125\fR 
.RT
.sp 2P
.sp 1P
.ce 1000
\fBTELEX\ NUMBERING\ PLAN\ FOR\ THE\ MOBILE\(hySATELLITE\ SERVICES\fR  |
\fBOF\ INMARSAT\fR 
.EF '%	Fascicle\ II.4\ \(em\ Rec.\ F.125''
.OF '''Fascicle\ II.4\ \(em\ Rec.\ F.125	%'
.ce 0
.sp 1P
.LP
\fB1\fR 	\fBIntroduction\fR 
.sp 1P
.RT
.sp 1P
.LP
1.1
	\fIPurpose\fR 
.sp 9p
.RT
.PP
The purpose of this Recommendation is to specify a telex numbering plan 
for mobile earth stations in systems operated by the International 
Maritime Satellite Organization (INMARSAT). Such systems may include maritime 
and aeronautical satellite systems. In the future the range of mobile satellite 
systems may also include satellite systems for other applications. 
.RT
.sp 1P
.LP
1.2
	\fITerminology\fR 
.sp 9p
.RT
.PP
The TELEPHONE/ISDN numbering plan for INMARSAT is contained in
Recommendation E.215. Recommendations\ E.215 and F.125 are designed to be as
similar as possible.
.PP
The following terms are used in this Recommendation:
.RT
.sp 1P
.LP
1.2.1
	\fBship station identity\fR 
.sp 9p
.RT
.PP
As defined in the Radio Regulations, Appendix 43. See also
Recommendation\ F.120.
.RT
.sp 1P
.LP
1.2.2
	\fBINMARSAT mobile international number\fR 
.sp 9p
.RT
.PP
The international number which identifies a terminal equipment
connected to an INMARSAT mobile earth station for access from a public
network.
.RT
.sp 1P
.LP
1.2.3
	\fBINMARSAT mobile number\fR 
.sp 9p
.RT
.PP
The part of the INMARSAT mobile international number which follows a F.69 
telex destination code allocated to the INMARSAT system. 
.RT
.sp 1P
.LP
1.2.4
	\fBINMARSAT mobile terminal number\fR 
.sp 9p
.RT
.PP
That part of the INMARSAT mobile number which
identifies
a specific terminal equipment connected to the mobile earth station.
.RT
.sp 1P
.LP
1.2.5
	\fIOther definitions\fR 
.sp 9p
.RT
.PP
For definition of terms such as maritime mobile\(hysatellite service, aeronautical 
mobile\(hysatellite service, ship earth station,\ etc., see the Radio Regulations. 
.RT
.sp 1P
.LP
1.3
	\fIBasic considerations\fR 
.sp 9p
.RT
.PP
The considerations which form the basis for the numbering plan
are:
.RT
.PP
1.3.1 
that it shall be possible to identify a mobile earth station
uniquely from the INMARSAT mobile number;
.sp 9p
.RT
.PP
1.3.2 
that the INMARSAT mobile number should have a format where
the same number could be used for access from all types of public network;
.PP
1.3.3
that the number of three\(hydigit F.69 telex destination codes
required for supporting future INMARSAT requirements should be as few as
possible;
.PP
1.3.4
that different routings could be used for calls to mobile earth
stations designed to different INMARSAT system standards;
.PP
1.3.5
that Administrations and INMARSAT could apply different charging and accounting 
rates to different INMARSAT system standards; 
.PP
1.3.6
that the numbering plan should provide capacity for the
identification of terminal equipment connected to a mobile earth station;
.bp
.PP
1.3.7
that the numbering plan should support access to multi\(hychannel
mobile earth stations.
.PP
1.3.8
that the new mobile earth station numbering plan should
incorporate numbering plan(s) already in use for the INMARSAT Standard\(hyA
system.
.PP
1.3.9
that the length of the INMARSAT mobile international
number
will be limited to 12\ digits to comply with Recommendations\ U.11 and\ U.12.
.LP
1.3.10\ \ that, for maritime\(hysatellite applications the ship station
numbering plan should support access to several ship earth stations in 
the same ship within one ship station identity; 
.LP
1.3.11\ \ that the Radio Regulations make provision for the allocation of
additional MIDs (maritime identification digits) for a specific country 
when necessary. 
.sp 2P
.LP
\fB2\fR 	\fBFormat of INMARSAT mobile international number\fR 
.sp 1P
.RT
.PP
The format of the INMARSAT mobile international
number is:
\v'6p'
.RT
.sp 1P
.ce 1000
\fICCC\fR T X\d1\u\ . |  |  X\fI\fI\d\fIk\fR\u
.ce 0
.sp 1P
.LP
.sp 1
where \fICCC\fR  | is a three\(hydigit F.69 telex destination code allocated 
to INMARSAT and T X\d1\u\ . |  | \ X\fI\fI\d\fIk\fR\u | is the INMARSAT 
mobile number. The 
format of the mobile INMARSAT number is given in \(sc\ 4.
.sp 2P
.LP
\fB3\fR 	\fBTelex destination codes for INMARSAT applications\fR 
.sp 1P
.RT
.PP
Telex destination codes for INMARSAT applications are given in
Recommendation\ F.69 and shown in Table\ 1/F.125.
.RT
.ce
\fBH.T. [T1.125]\fR 
.ce
TABLE\ 1/F.125
.ce
\fBTelex destination codes for INMARSAT applications\fR 
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(60p) | cw(114p) .
Telex destination code	Application
_
.T&
cw(60p) | lw(114p) .
581	 {
Atlantic ocean region, INMARSAT
 }
.T&
cw(60p) | lw(114p) .
582	 {
Pacific ocean region, INMARSAT
 }
.T&
cw(60p) | lw(114p) .
583	Indian ocean region, INMARSAT
_
.TE
.nr PS 9
.RT
.ad r
\fBTable 1/F.125 [T1.125], p.\fR 
.sp 1P
.RT
.ad b
.RT
.sp 2P
.LP
\fB4\fR 	\fBFormat of INMARSAT mobile earth station number\fR 
.sp 1P
.RT
.sp 1P
.LP
4.1
	\fIGeneral format\fR 
.sp 9p
.RT
.PP
The general format of the INMARSAT \fImobile number\fR  |
is
\v'6p'
.RT
.sp 1P
.ce 1000
T X\d1\uX\d2\u\ . |  | \ X\fB\fI\d\fIk\fR\u
.ce 0
.sp 1P
.LP
.sp 1
where the digit T is used for discrimination between different INMARSAT
systems.
.PP
The formats used for the various INMARSAT systems are defined
below. The values of the T digits are summarized in Table\ 2/F.125.
.PP
The T digits represent a limited resource and a new T digit
should therefore only be allocated when necessary for technical or operational 
reasons. 
.PP
The CCITT Secretariat would be responsible for co\(hyordinating the
allocation of new T [or U] (see \(sc\ 4.6) digits with the competent Study
Groups.
.bp
.RT
.ce
\fBH.T. [T2.125]\fR 
.ce
TABLE\ 2/F.125
.ce
\fBValue of T digit for various applications\fR 
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(30p) | cw(198p) .
T digit	Applications
_
.T&
cw(30p) | lw(198p) .
0	 {
Group call in INMARSAT Standard\(hyA, see \(sc\ 4.2.2
 }
.T&
cw(30p) | lw(198p) .
1	 {
Ordinary call in INMARSAT Standard\(hyA, see \(sc\ 4.2.1
 }
.T&
cw(30p) | lw(198p) .
2	Reserved for future use
.T&
cw(30p) | lw(198p) .
3	 {
Ordinary call in INMARSAT Standard\(hyB, see \(sc\ 4.3
 }
.T&
cw(30p) | lw(198p) .
4	 {
Ordinary call in INMARSAT Standard\(hyC, see \(sc\ 4.4
 }
.T&
cw(30p) | lw(198p) .
5	 {
Ordinary call in INMARSAT aeronautical system, see \(sc\ 4.5
 }
.T&
cw(30p) | lw(198p) .
6	Reserved for future use
.T&
cw(30p) | lw(198p) .
7	Reserved for future use
.T&
cw(30p) | lw(198p) .
8	 {
Expedient access to special service terminations in INMARSAT
Standard\(hyA, see Recommendation\ E.215
 }
.T&
cw(30p) | lw(198p) .
9	 {
Reserved for future expansion, see \(sc\ 4.6
 }
_
.TE
.nr PS 9
.RT
.ad r
\fBTable 2/F.125 [T2.125], p.\fR 
.sp 1P
.RT
.ad b
.RT
.sp 2P
.LP
4.2
	\fIFormats for\fR 
\fIINMARSAT Standard\(hyA system\fR 
.sp 1P
.RT
.sp 1P
.LP
4.2.1
	\fIOrdinary calls\fR 
.sp 9p
.RT
.PP
The number format used for ordinary calls to ship earth stations in INMARSAT 
Standard\(hyA system is as follows: 
\v'6p'
.RT
.sp 1P
.ce 1000
1 X\d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\u(7 digits)
.ce 0
.sp 1P
.LP
.sp 1
where 1 corresponds to the T digit and the digits
X\d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uare allocated to ships by INMARSAT.
.PP
The length of the INMARSAT mobile number will be 7 digits,
making the length of the INMARSAT mobile international number equal to
10\ digits.
.sp 1P
.LP
4.2.2
	\fIGroup calls\fR 
.sp 9p
.RT
.PP
For group calls, the INMARSAT mobile number takes
the following format:
\v'6p'
.RT
.sp 1P
.ce 1000
0 X\d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u(9 digits)
.ce 0
.sp 1P
.LP
.sp 1
where 0 corresponds to the T digit and X\d1\uthrough X\d8\utakes values
assigned by INMARSAT.
.PP
The group call numbering scheme is shown in \(sc\ B.2.2.
.PP
The length of the INMARSAT mobile number will be 9 digits making the length 
of the INMARSAT mobile international number equal to 12\ digits. 
.bp
.RT
.sp 2P
.LP
4.3
	\fIFormats for\fR 
\fIINMARSAT Standard\(hyB system\fR 
.sp 1P
.RT
.sp 1P
.LP
4.3.1
	\fIOrdinary calls\fR 
.sp 9p
.RT
.PP
For ordinary calls to ship earth stations in INMARSAT Standard\(hyB
system, the format shall be initially:
\v'6p'
.RT
.sp 1P
.ce 1000
3 \d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u(9 digits)
.ce 0
.sp 1P
.LP
.sp 1
where 3 corresponds to the T digit and the M\d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uare 
the first 6\ digits of the ship station identity MIDXXXOOO (see Annex\ 
A). 
The INMARSAT mobile terminal number digits X\d7\uX\d8\umay be used
for identifying terminal equipment connected to a ship earth station, for
discriminating between channels for multi\(hychannel ship earth stations 
and for discriminating between several ship earth stations on the same 
ship. 
.PP
The number format is:
\v'6p'
.sp 1P
.ce 1000
3 \d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u(9 digits)
.ce 0
.sp 1P
.LP
.sp 1
where the digit X\d1\umay take the values 8 or 9 which are reserved for 
future INMARSAT applications. 
.sp 1P
.LP
4.3.2
	\fIGroup calls\fR 
.sp 9p
.RT
.PP
The group call numbering scheme is shown in Annex\ B.
.PP
The length of the INMARSAT mobile number will be 9\ digits making the length 
of the INMARSAT mobile international number equal to 12\ digits. 
.RT
.sp 2P
.LP
4.4
	\fIFormat for\fR 
\fIINMARSAT Standard\(hyC system\fR 
.sp 1P
.RT
.sp 1P
.LP
4.4.1
	\fIOrdinary calls\fR 
.sp 9p
.RT
.PP
For ordinary calls to ship earth stations in INMARSAT Standard\(hyC
system, the format shall be initially:
\v'6p'
.RT
.sp 1P
.ce 1000
4 \d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u(9 digits)
.ce 0
.sp 1P
.LP
.sp 1
where 4 corresponds to the T digit and where at least the digits
M\d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uare part of the ship station identity. The
digits X\d7\uX\d8\umay also be part of the ship station identity or be 
used for discrimination between several ship earth stations on the same 
ship. 
.PP
The number format is:
\v'6p'
.sp 1P
.ce 1000
4 \d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u(9 digits)
.ce 0
.sp 1P
.LP
.sp 1
where the digit X\d1\umay take the values 8 or 9 which are reserved for
INMARSAT applications.
.sp 1P
.LP
4.4.2
	\fIGroup calls\fR 
.sp 9p
.RT
.PP
The group call numbering scheme is shown in Annex\ B. The length of the 
INMARSAT mobile number will be 9\ digits making the length of the INMARSAT 
mobile international number equal to 12\ digits. 
.RT
.sp 1P
.LP
4.5
	\fIFormat for\fR 
\fIINMARSAT aeronautical system\fR 
.sp 9p
.RT
.PP
The general format of numbers in the INMARSAT aeronautical system is as 
follows: 
\v'6p'
.RT
.sp 1P
.ce 1000
5 \d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u(9 digits)
.ce 0
.sp 1P
.LP
.sp 1
where 5 corresponds to the T digit.
.PP
The format of the digits X\d1\uthrough X\d8\uis still to be
determined.
.PP
The length of the INMARSAT mobile number will be 9\ digits making the length 
of the INMARSAT mobile international number equal to 12\ digits. 
.bp
.RT
.sp 1P
.LP
4.6
	\fIFuture\fR 
\fIINMARSAT standard systems\fR 
.sp 9p
.RT
.PP
T digits should be allocated for each new INMARSAT standard
system in the future. If an earlier system is taken out of service, T\ digits
allocated for that system may be reallocated to new systems.
.PP
If the capacity provided by the T digits of Table\ 2/F.125 is not
sufficient, then further capacity may be made available by using T\ =\ 9
followed by an additional digit (U) as follows:
\v'6p'
.RT
.sp 1P
.ce 1000
9 U X\d1\uX\d2\u\ . |  | \ X\fI\fI\d\fIk\fR\u
.ce 0
.sp 1P
.LP
.sp 1
where the digits X\d1\u\ . |  | \ X\fI\fI\d\fIk\fR\u | identifies the mobile 
earth station 
and any extension connected to it. The digit\ U is used to identify new
INMARSAT systems or for technical and operational reasons (see \(sc\ 6 below).
.sp 2P
.LP
\fB5\fR 	\fBDigit analysis\fR 
.sp 1P
.RT
.PP
If different routing and/or accounting applies to different
INMARSAT standard systems, then the digits CCCT need to be analyzed at
international exchanges.
.PP
If the routing capacity is increased by using T\ =\ 9 (see \(sc\ 4.6),
then the digits CCC9U need to be analyzed and this is for further study.
.RT
.sp 2P
.LP
\fB6\fR 	\fBPresentation of INMARSAT mobile numbers in directories\fR 
.sp 1P
.RT
.sp 1P
.LP
6.1
	\fIGeneral\fR 
.sp 9p
.RT
.PP
INMARSAT mobile numbers\fR  | may be published in separate
directories or in separate sections of general directories.
.PP
In directories, only the INMARSAT mobile numbers, as specified
in \(sc\ 4.1, shall be listed. The telex destination code to be used and
instruction for the subscribers should be contained in general parts of the
directories.
.PP
The subject on directories for mobile satellite services requires
further studies.
.RT
.ce 1000
ANNEX\ A
.ce 0
.ce 1000
(to Recommendation F.125)
.sp 9p
.RT
.ce 0
.ce 1000
\fBUse of\fR 
\fBship station identification for maritime applications\fR 
.sp 1P
.RT
.ce 0
.ce 1000
\fBof systems operated by INMARSAT\fR 
.ce 0
.LP
A.1
	\fIGeneral\fR 
.sp 1P
.RT
.PP
Appendix 43 of the Radio Regulations defines an international
identification plan for ships participating in the maritime mobile services.
The ship station identity consists of nine digits and is composed as
follows:
\v'6p'
.RT
.sp 1P
.ce 1000
M\d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\uX\d9\u
.ce 0
.sp 1P
.LP
.sp 1
where the digits M\d1\uI\d2\uD\d3\udetermine the ship's nationality.
.PP
For ships participating in systems operated by INMARSAT, the main part 
of this Recommendation specifies a format of the INMARSAT mobile 
number as follows:
\v'6p'
.sp 1P
.ce 1000
T X\d1\uX\d2\u\ . |  | \ X\fI\fI\d\fIk\fR\u
.ce 0
.sp 1P
.PP
.sp 1
The purpose of the digit T is explained in \(sc\ 4.
.bp
.PP
For maritime applications, the number can be regarded as being
composed of three blocks as follows:
.RT
.ce
\fBH.T. [T3.125]\fR 
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(48p) | cw(48p) | cw(48p) .
T	X 1X 2 . |  |  X \fIn\fR	 {
X
\d\fIn\fR
+1
\u . |  |  X
\fIk\fR
 }
_
.T&
cw(48p) | cw(48p) | cw(48p) .
Block 1	Block 2	Block 3
_
.TE
.nr PS 9
.RT
.ad r
\fBTable  [T3.125], p.\fR 
.sp 1P
.RT
.ad b
.RT
.LP
where the digit in block 1 is the digit T, the digits in block 2 are related
to the ship station identity as explained below, and block\ 3 contains digits
which are used for other purposes (e.g.\ INMARSAT mobile terminal number). In
some INMARSAT systems, block\ 3 may be empty.
.PP
\fINote\ 1\fR \ \(em\ For the INMARSAT Standard\(hyA system, INMARSAT applies 
a ship numbering plan which is not related to the ship station identification 
plan of the Radio Regulations. In this numbering plan the digit\ T takes the
fixed value\ T\ =\ 1.
.PP
\fINote\ 2\fR \ \(em\ For INMARSAT Standard\(hyB and C systems, the digit 
X\d1\umay take the values 8 or\ 9 for future applications. In this case, 
the digits in block\ 2 are not related to the ship station identification 
plan. 
.RT
.sp 2P
.LP
A.2
	\fIConstraints on ship station identification and numbering\fR 
.sp 1P
.RT
.PP
A.2.1 
The present number capacity of the telex network requires that the INMARSAT 
mobile number must consist of 9 or fewer digits to comply with 
the requirements of international signalling systems specified in the U\(hySeries 
Recommendations. 
.sp 9p
.RT
.PP
A.2.2
The new numbering plan must cater for the following:
.LP
	\(em
	identification for calls to ship board terminal equipment
connected to the ship earth station;
.LP
	\(em
	the possibility of several ship earth stations on the same
ship where all ship earth stations have a number associated
with the unique ship station identity of the ship;
.LP
	\(em
	the capability of supporting multi\(hychannel ship earth
stations.
.PP
These capabilities may require digits in block 3 of the INMARSAT mobile 
number, thus reducing the available space for block\ 2. 
.sp 2P
.LP
A.3
	\fIApplications of ship station identity\fR 
.sp 1P
.RT
.sp 1P
.LP
A.3.1
	\fIDigit capacity in block 2\fR 
.sp 9p
.RT
.PP
The INMARSAT Standard\(hyA system can only support 6 digits in block 2 
because of the addressing capacity on the radio path. 
.PP
The addressing capacity of INMARSAT Standard\(hyB and C systems on the
ratio path can cater for up to 9\ digits in block\ 2. However, the limited 
digit capacity of the terrestrial networks puts the following initial constraints 
to the number of digits in block\ 2: 
.RT
.LP
	\(em
	for the INMARSAT Standard\(hyB system, the initial digit
capacity in block\ 2 is 6\ digits in order to allow sufficient
capacity in block\ 3 for supporting the capabilities listed in
\(sc\ A.2.2 above.
.LP
	\(em
	for the INMARSAT Standard\(hyC system, the initial digital
capacity in block\ 2 is 6\ digits to allow sufficient capacity
in block\ 3 for supporting the possibility of identifying
several terminal equipments connected to a ship earth station and of several 
ship earth stations on the same ship. 
.
.sp 1P
.LP
A.3.2
	\fIMapping between ship station identity and digits in block\ 2\fR 
.sp 9p
.RT
.PP
The mapping between ship station identity and digits in block 2 is shown 
in Table\ A\(hy1/F.125. 
.PP
For ship earth stations, the ship station identity is thus derived
from the digits in block 2 by adding 0\d5\uat the end until the identity
consists of 9\ digits.
.bp
.PP
The digit T in block 1 determines the type of ship earth station
and, implicitly, the number of digits in block\ 2. The relationship is 
shown in Table\ A\(hy2/F.125. Further details of the number structure is 
given in the main part of the Recommendation. 
.RT
.sp 1P
.LP
A.3.3
	\fIShips equipped with several INMARSAT standard systems\fR 
.sp 9p
.RT
.PP
The ship station identity for such ships is the one derived from
the ship earth station standard having the smallest size of block\ 2. This
applies only if the numbering systems for the ship earth station standards
are related to the ship station identification plan.
.RT
.ce
\fBH.T. [T4.125]\fR 
.ce
TABLE\ A\(hy1/F.125
.ce
\fBMapping between ship station identity and digits\fR 
.ce
\fBin block 2 of the INMARSAT mobile station number\fR 
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(90p) | cw(42p) | cw(42p) | cw(42p) .
Ship station identity	XXX XXX 000	XXX XXX 0X0	XXX XXX 0XX
_
.T&
cw(30p) | cw(30p) | cw(30p) | cw(42p) | cw(42p) | cw(42p) .
Block 2 mapping	Size of  block 2	6 digits	XXX XXX	Mapping not possible	 {
Mapping not possible
X: any digit between zero (0) and nine (9)
0: zero (0)
 }
_
.TE
.nr PS 9
.RT
.ad r
\fBTableau A\(hy1/F.125 [T4.125]. p.\fR 
.sp 1P
.RT
.ad b
.RT
.ce
\fBH.T. [T5.125]\fR 
.ce
TABLE\ A\(hy2/F.125
.ce
\fBRelationship between the digit T and the format\fR 
.ce

.ce
\fBof the ship station identity\fR 
.ce
\fBin 12 digit INMARSAT mobile
.ce
international numbers\fR 
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
Value of digit T	INMARSAT  standard system	Number of digits  in block 2	 {
Format of ship
station identity
 }
_
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
0	A	(Note 1)	(Note 1)
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
1	A	6	(Note 2)
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
2	Reserved	\(em	\(em
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
3	B	6	XXX XXX 000
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
4	C	6	XXX XXX 000
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
5	Aeronautical	(Note 3)	(Note 3)
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
6	Reserved	\(em	\(em
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
7	Reserved	\(em	\(em
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
8	A	(Note 4)	(Note 4)
.T&
cw(36p) | cw(44p) | cw(50p) | cw(44p) .
9	Future expansion	Further study	Further study
.TE
.LP
\fINote\ 1\fR
\ \(em\ Group call address (see Annex B for format of group call
addresses).
.LP
\fINote\ 2\fR
\ \(em\ The INMARSAT mobile number is not related to the ship station
identification plan of Appendix\ 43, Radio Regulations.
.LP
\fINote\ 3\fR
\ \(em\ The numbering plan for the Aeronautical\(hySatellite service is not
related to the ship station identification plan of Appendix\ 43, Radio
Regulations.
.LP
\fINote\ 4\fR
\ \(em\ See \(sc\ 4 for the use of this T\(hydigit.
.nr PS 9
.RT
.ad r
\fBTableau A\(hy2/F.125 [T5.125]. p.\fR 
.sp 1P
.RT
.ad b
.RT
.LP
.bp
.ce 1000
ANNEX\ B
.ce 0
.ce 1000
(to Recommendation F.125)
.sp 9p
.RT
.ce 0
.ce 1000
\fBGroup call numbering scheme for the INMARSAT system\fR 
.sp 1P
.RT
.ce 0
.LP
B.1
	\fICategories for group call services\fR 
.sp 1P
.RT
.PP
At present, four different categories of group call service have
been envisaged within the maritime mobile\(hysatellite service.
.RT
.sp 1P
.LP
B.1.1
	\fINational group calls\fR 
.sp 9p
.RT
.PP
The category is defined to address all ships of the same
nationality.
.RT
.sp 1P
.LP
B.1.2
	\fIFleet group calls\fR 
.sp 9p
.RT
.PP
This category is defined to address all ships within one
fleet.
.RT
.sp 1P
.LP
B.1.3
	\fISelected group calls\fR 
.sp 9p
.RT
.PP
This category is defined to address a number of ships having a
community of interest irrespective of nationalities or fleets, and forming a
predefined group.
.RT
.sp 1P
.LP
B.1.4
	\fIArea group calls\fR 
.sp 9p
.RT
.PP
This category is defined to address all ships of any nationality
located within a predetermined geographical area.
.RT
.sp 2P
.LP
B.2
	\fIGroup call formats\fR 
.sp 1P
.RT
.PP
B.2.1
The general group call format is
T\ \d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\uwhere the digits
T\ \d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\utake the values in \(sc\ 
B.2.2 for 
INMARSAT Standard\(hyA and the values in \(sc\ B.2.3 for other INMARSAT 
standards. 
.sp 9p
.RT
.PP
B.2.2
The group call numbering schemes for the INMARSAT Standard\(hyA
system will use eight decimal digits X\d1\u\ . |  | \ X\d8\ufollowing the 
T\ digit, with T\ =\ 0, allocated as follows: 
.LP
	M\d2\uI\d3\uD\d4\u0\d5\u0\d6\u0\d7\u0\d8\u0\d9\u	National group call
.LP
	M\d2\uI\d3\uD\d4\uF\d5\uF\d6\uF\d7\uF\d8\uF\d9\u	Fleet group call
.LP
	0\d2\u0\d3\uS\d4\uS\d5\uS\d6\uS\d7\uS\d8\uS\d9\u	Selected group call
.LP
	0\d2\u0\d3\u0\d4\uA\d5\uA\d6\uA\d7\uA\d8\uA\d9\u	Area group call
.PP
where M\d2\u\ \(!=\ 0\ \ \ \ M\d2\u\ \(!=\ 1\ \ \ \ F\d5\u\ \(!=\ 0\ \ 
\ \ S\d4\u\ \(!=\ 0. 
.PP
For T = 1 or 8, the group call number is not valid.
.RT
.PP
B.2.3
For INMARSAT standards other than Standard\(hyA, the format of the digits 
X\d1\u\ . |  | \ X\d8\uis as follows: 
.sp 9p
.RT
.LP
	0MID\ 0\d5\u0\d6\u0\d7\u0\d8\u	National group calls
.LP
	0MID\ F\d5\uF\d6\uF\d7\uF\d8\u	Fleet group calls
.LP
	000\ S\d4\uS\d5\uS\d6\uS\d7\uS\d8\u	Selected group calls
.LP
	0000\ A\d5\uA\d6\uA\d7\uA\d8\u	Area group calls
.PP
The T digit takes the value allocated for the particular standard in accordance 
with Table\ 2/F.125. 
.PP
Hence, for a fleet group call to a Standard B ship earth station, the format 
would be: 
\v'6p'
.RT
.sp 1P
.ce 1000
3\ 0\ MID\ F\d5\uF\d6\uF\d7\uF\d8\u
.ce 0
.sp 1P
.LP
.sp 1
and for a fleet group call to a Standard\(hyC ship earth station, the format 
would be: 
\v'6p'
.LP
4 0 MID F\d5\uF\d6\uF\d7\uF\d8\u.bp
.sp 1P
.ce 1000
.ce 0
.sp 1P
.PP
.sp 1
B.2.4
The MIDs in national and fleet group numbers are those
allocated in Table\ 1 of Appendix\ 43, Radio Regulations\ [1].
.PP
B.2.5
In accordance with \(sc\ 4 of the above\(hymentioned Appendix, the
particular MID reflects only the country allocating the group call identity 
and therefore does not prevent group calls to fleets containing more than 
one ship nationality. Allocation of selected group numbers should be avoided 
when the 
same group could equally well be assigned a fleet group number.
.PP
B.2.6
National group numbers and fleet group numbers should be
allocated by countries. Selected group numbers and area group numbers as
applicable to the INMARSAT system should be allocated by INMARSAT; allocation 
of such numbers may require cooperation with other organizations. 
.PP
B.2.7
A country having assigned a national group or fleet group
number should notify the Director\(hyGeneral of INMARSAT if those numbers are
going to be used within the INMARSAT system.
.sp 2P
.LP
	\fBReference\fR 
.sp 1P
.RT
.LP
[1]
	\fIRadio Regulations\fR , Appendix 43, ITU, Geneva, 1982, revised in 1985,
1986 and 1988.
\v'1P'
.sp 2P
.LP
\fBRecommendation\ F.126\fR 
.RT
.sp 2P
.ce 1000
\fBSELECTION\ PROCEDURES\ FOR\ THE\ INMARSAT\fR 
.EF '%	Fascicle\ II.4\ \(em\ Rec.\ F.126''
.OF '''Fascicle\ II.4\ \(em\ Rec.\ F.126	%'
.ce 0
.sp 1P
.ce 1000
\fBMOBIILE\(hySATELLITE\ TELEX\ SERVICE\fR 
.ce 0
.sp 1P
.LP
\fB1\fR 	\fBIntroduction\fR 
.sp 1P
.RT
.sp 1P
.LP
1.1
	\fIPurpose\fR 
.sp 9p
.RT
.PP
The purpose of this Recommendation is to standardize:
.RT
.LP
	a)
	the numbering and selection procedures for subscribers in the
international telex service calling a ship\(hyearth station in
the INMARSAT systems;
.LP
	b)
	the procedures for calling a subscriber, an operator or a
special service termination in the international telex service
from a ship\(hyearth station.
.PP
This Recommendation applies to INMARSAT Standard\(hyA, B and C systems. 
Selection procedures for the INMARSAT aeronautical system is for further 
study.
.sp 1P
.LP
1.2
	\fIRelated CCITT Recommendations\fR 
.sp 9p
.RT
.LP
	F.125
	Telex numbering plan for the mobile\(hysatellite services
of INMARSAT
.LP
	F.127
	Operational procedures for interworking between the
telex service and the service offered by INMARSAT
Standard\(hyC system
.LP
	F.60 
	Operational provisions for the international telex
service
.LP
	F.68 
	Establishment of the automatic intercontinental telex
network
.LP
	F.69 
	Plan for telex destination codes
.LP
	F.72 
	International telex store\(hyand\(hyforward\ \(em\ general
principles and operational aspects
.LP
	E.200/F.110
	Operational provisions for the Maritime Mobile
Service
.LP
	F.122
	Operational procedures for the Maritime Satellite Data
Transmission Service
.LP
	F.130
	Maritime answer\(hyback codes
.bp
.LP
	F.131
	Radiotelex service codes
.LP
	E.215
	Telephone/ISDN numbering plan for the mobile\(hysatellite
services of INMARSAT
.LP
	U.61
	Detailed requirements to be met in interfacing the
international telex network with maritime satellite
systems
.LP
	E.216
	Selection procedures for the INMARSAT
mobile\(hysatellite telephone and ISDN services
.sp 2P
.LP
\fB2\fR 	\fBNumbering procedures\fR 
.sp 1P
.RT
.PP
2.1
Maritime mobile\(hysatellite services are international in nature
and international procedures will be adopted to provide access to these
services. For some purposes, a maritime mobile\(hysatellite system can 
be regarded as analogous to a national network and the ship\(hyearth stations 
as subscribers within that network. 
.sp 9p
.RT
.PP
For automatic shore originated calls, international selection
procedures will be adopted using the three\(hydigit telex destination code\ 58S
and an INMARSAT mobile number where the digit\ S indicates the ocean
region. The telex numbering plan for ship\(hyearth stations in the INMARSAT 
System is given in Recommendation\ F.125. 
.PP
2.2
For automatic ship originated calls international selection
procedures will be used, including a stand
ardized access code, i.e. all
ships in all ocean areas will use the same access code to identify an automatic 
international call. 
.sp 9p
.RT
.PP
In addition, access codes will be adopted to identify other
functions of the satellite system. Annex\ A lists the allocation of the 
access codes. Additional access codes may be required and these can be 
added, using 
the spare decimal numeric combinations.
.PP
It is desirable to have one set of access codes for all services. The access 
codes listed in Annex\ A can be used where applicable for telephone and 
data services and, if necessary, additional access codes for these services 
may be assigned by the competent Study Group. Close cooperation between 
the 
competent Study Groups will be necessary when assigning new access codes.
.PP
The use of some access codes could be barred to some customers.
.RT
.PP
2.3
The access codes will be sent over the radio path to the coast earth station 
but would not be used outside the satellite system. Hence, an 
access code sent to the coast earth station would not be used in the
international network.
.sp 9p
.RT
.PP
2.4
The service associated with each access code is defined in
Annex\ B.
.sp 2P
.LP
\fB3\fR 	\fBProcedures for shore\(hyto\(hyship calls\fR 
.sp 1P
.RT
.sp 1P
.LP
3.1
	\fIGeneral selection sequence\fR 
.sp 9p
.RT
.PP
A shore based subscriber calling a ship in the INMARSAT system will select 
a numbering sequence as follows: 
.RT
.LP
	58S
	Telex destination code
.LP
	T\ \d1\uX\d2\u |  |  |  | \dn\u	INMARSAT mobile number
.LP
	+
	End of selection.
.sp 1P
.LP
3.2
	\fISelection of\fR 
\fIS digit\fR 
.sp 9p
.RT
.PP
The numbering sequence requires the subscriber to know the
satellite coverage area in which the ship is located. The values of the 
S\ digit are given in Recommendation\ F.125. 
.bp
.RT
.sp 1P
.LP
3.3
	\fIINMARSAT mobile number\fR 
.sp 9p
.RT
.PP
The INMARSAT mobile number T\ X\d1\uX\d2\u |  |  |  | \dn\utakes one
of the formats defined in Recommendation\ F.125. The various possibilities 
are summarized in Table\ 1/F.126 and are further outlined below. 
.RT
.LP
.ce
\fBH.T. [T1.126]\fR 
.ce
TABLE\ 1/F.126
.ce
\fBFormats of INMARSAT mobile numbers\fR 
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(60p) | cw(132p) .
Format	Application
_
.T&
lw(60p) | lw(132p) .
1\ X 1X 2X 3X 4X 5X 6	 {
Ordinary call to INMARSAT Standard\(hyA ship\(hyearth station
 }
.T&
lw(60p) | lw(132p) .
3\ M 1I 2D 3X 4X 5X 6X 7X 8	 {
Ordinary call to INMARSAT Standard\(hyB ship\(hyearth station
 }
.T&
lw(60p) | lw(132p) .
4\ M 1I 2D 3X 4X 5X 6X 7X 8	 {
Ordinary call to INMARSAT Standard\(hyC ship\(hyearth
station
 }
.T&
lw(60p) | lw(132p) .
5\ X 1X 2X 3X 4X 5X 6X 7X 8	 {
Call to INMARSAT aeronautical aircraft earth
station
 }
_
.TE
.nr PS 9
.RT
.ad r
\fBTableau 1/F.126 [T1.126], p.10\fR 
.sp 1P
.RT
.ad b
.RT
.sp 1P
.LP
3.3.1
	\fIINMARSAT Standard\(hyA system\fR 
.sp 9p
.RT
.PP
For an ordinary call to an INMARSAT Standard\(hyA ship earth station,
the format of the INMARSAT mobile number is:
\v'6p'
.RT
.sp 1P
.ce 1000
1 X\d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\u
.ce 0
.sp 1P
.LP
.sp 1
where the digits X\d1\uX\d2\uX\d3\uX\d4\uX\d5\uX\d6\uidentify a specific 
ship earth station. If there are more than one ship earth station at the 
ship, each will have its own unique INMARSAT mobile number. 
.sp 1P
.LP
3.3.2
	\fIINMARSAT Standard\(hyB system\fR 
.sp 9p
.RT
.PP
The INMARSAT mobile number takes the following format for ship
earth stations in INMARSAT Standard\ B system:
\v'6p'
.RT
.sp 1P
.ce 1000
3 \d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u
.ce 0
.sp 1P
.LP
.sp 1
.sp 1P
.LP
3.3.3
	\fIINMARSAT Standard\(hyC system\fR 
.sp 9p
.RT
.PP
The INMARSAT mobile number takes the following
format:
\v'6p'
.RT
.sp 1P
.ce 1000
4 \d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\u
.ce 0
.sp 1P
.LP
.sp 1
3.3.4
	\fIINMARSAT Aeronautical system\fR 
.sp 9p
.RT
.PP
The format of the INMARSAT mobile number, 5 X,X\d2\uX\d3\uX\d4\uX\d5\uX\d6\uX\d7\uX\d8\uis 
still to be determined. 
.RT
.sp 2P
.LP
\fB4\fR 	\fBProcedures for ship\(hyto\(hyshore calls\fR 
.sp 1P
.RT
.sp 1P
.LP
4.1
	\fIGeneral\fR 
.sp 9p
.RT
.PP
It should be possible to provide all information required for
establishing a call from user terminals connected to the ship\(hyearth station.
Such information may include:
.RT
.LP
	a)
	called party address including any access code;
.LP
	b)
	desired coast\(hyearth station;
.LP
	c)
	supplementary service requests.
.bp
.PP
The information in a) is required for all calls. The information in b) 
and c) may be required on some calls, e.g.\ if the user requests a 
specific routing of the call or if specific service characteristics are 
to be applied. 
.PP
These ship\(hyto\(hyshore procedures are not applicable to Standard C and
reference should be made to Recommendation\ F.127 for further details.
.RT
.sp 2P
.LP
4.2
	\fICalling a terrestrial subscriber\fR 
.sp 1P
.RT
.PP
4.2.1 
A shipboard user will select the access code 00 followed by the
full international telex number required, whether or not the coast\(hyearth
station is located in the country of the called subscriber. Hence the numbering 
sequence selected by a ship board subscriber will be of the form: 
.sp 9p
.RT
.LP
	00
	Access code for automatic call
.LP
	00
I\d1\uI\d2\uI\d3\u	2 or 3 digit telex destination code
.LP
	00I\d1\uI\d2\uI\d3\uN\d1\u\(hyN\dn\u	National number of the
subscriber.
.LP
	00I\d1\uI\d2\uI\d3\uN\d1\u\(hyN\dn\u+
	End of selection.
.PP
4.2.2
It is also possible to select specific services associated with the call 
by use of access codes other than\ 00, e.g.\ 21\ (store and forward 
international), 22\ (store and forward national), 23 (short code selection)
and\ 24 (telex letter services).
.sp 9p
.RT
.LP
	A\d1\u\ A\d2\u	Access code
.LP
	A\d1\uA\d2\uI\d1\uI\d2\uI\d3\u	2 or 3 digit telex destination
code
.LP
	A\d1\uA\d2\uI\d1\uI\d2\uI\d3\uN\d1\u\(hyN\dn\u	National number of
the subscriber
.LP
	A\d1\uA\d2\uI\d1\uI\d2\uI\d3\uN\d1\u\(hyN\dn\u+
	End of
selection.
.PP
4.2.3
The ship earth station will permit the choice of coast earth
station identity through which the call is to be routed. Convenient land\(hyline 
routings (e.g.\ use of the coast earth station nearest the destination 
country) could be encouraged by tariff considerations. 
.sp 9p
.RT
.PP
4.2.4
In INMARSAT Standard\(hyB systems the user may choose among several service 
options. If some service characteristics are user selectable, it should 
be possible to make the selection from the user terminal. 
.sp 2P
.LP
4.3
	\fICalling an operator\fR 
.sp 1P
.RT
.PP
4.3.1
A shipboard user will select the access code followed by a
second digit to identify the type of operator required.
.sp 9p
.RT
.PP
4.3.2
Table 2/F.126 illustrates the principle involved for two types
of operator.
.PP
Some Administrations may wish to operate a system whereby
shipboard users insert after the operator access code a telex destination 
code (I\d1\u,I\d2\u,I\d3\u). The insertion of the telex destination code 
will allow 
the call to be routed to a relevant operator. If an Administration operating
such a system receives an operator access code without the optional digits,
then the call must still be connected to an appropriate operator. Similarly, 
if an Administration not operating such a system receives an operator access 
code followed by optional digits, then the optional digits should be ignored 
and the call connected to the operator denoted by the access code alone. 
.ce
\fBH.T. [T2.126]\fR 
.ce
TABLE\ 2/F.126
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(30p) sw(30p) | lw(54p) | lw(48p) | lw(66p) , c | c | ^ | ^ | ^ .
Access code			
Digit 1	 {
Digit 2
Optional digits
End of selection
Type of operator
 }
_
.T&
cw(30p) | cw(30p) | cw(54p) | cw(48p) | lw(66p) .
1	1	I 1I 2I 3	+	International operator
.T&
cw(30p) | cw(30p) | cw(54p) | cw(48p) | lw(66p) .
1	2	I 1I 2I 3	+	International enquiries
_
.TE
.nr PS 9
.RT
.ad r
\fBTable 2/F.126 [T2.126], p.\fR 
.sp 1P
.RT
.ad b
.RT
.LP
.bp
.PP
4.3.3
Each Administration may decide which operators to provide,
where they are to be located and how the call would be routed. If a request 
is received from a ship for a type of operator that the Administration 
does not 
provide, then the call will be routed to an operator convenient for that
Administration.
.sp 9p
.RT
.sp 1P
.LP
4.4
	\fIOther access codes in Annex A\fR 
.sp 9p
.RT
.PP
\fB\fR Each Administration may decide which services to provide and how
the call will be routed. If a request is received from a ship for a service
that the Administration does not provide, then the call will be routed to a
location convenient for that Administration.
.PP
The general selection sequence could be as shown in
Table 3/F.126.
.PP
The actual sequence may be decided by the Administration or
INMARSAT.
.RT
.ce
\fBH.T. [T3.126]\fR 
.ce
TABLE\ 3/F.126
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(30p) sw(30p) | lw(54p) | lw(48p) | lw(66p) , c | c | ^ | ^ | ^ .
Access code			
Digit 1	 {
Digit 2
Optional digits
End of selection
Type of service
 }
_
.T&
cw(30p) | cw(30p) | cw(54p) | cw(48p) | lw(66p) .
2	3	X 1X 2	+	Short code selection
.T&
cw(30p) | cw(30p) | cw(54p) | cw(48p) | lw(66p) .
3	2	I 1I 2I 3	+	Medical advice
.T&
cw(30p) | cw(30p) | cw(54p) | cw(48p) | lw(66p) .
3	8	\(em	+	Medical assistance
_
.TE
.nr PS 9
.RT
.ad r
\fBTable 3/F.126 [T3.126], p.\fR 
.sp 1P
.RT
.ad b
.RT
.sp 2P
.LP
\fB5\fR 	\fBProcedures for ship\(hyto\(hyship calls\fR 
.sp 1P
.RT
.PP
5.1
Selection procedures for ship\(hyto\(hyship calls will be similar to
those for ship\(hyto\(hyshore calls, using the maritime telex destination 
code\ 58S. The numbering sequence selected by the shipboard user will be 
of the form: 
.sp 9p
.RT
.LP
	00
	Access code for automatic call
.LP
	00
58S
	Telex destination code
.LP
	0058S
T\ \d1\uX\d2\u\ . |  | \ X\dn\u	INMARSAT mobile
number
.PP
This format will be used whether or not the ships are in the same  ocean area.
.PP
5.2
Each Administration operating a coast earth station may decide whether 
to switch ship\(hyto\(hyship traffic within an ocean area at the coast 
earth station or at an international telex switching centre. 
.sp 9p
.RT
.sp 2P
.LP
\fB6\fR 	\fBInstructions for telex subscribers\fR 
.sp 1P
.RT
.PP
The general principles laid down in Recommendation\ F.60 apply also to 
the Maritime Mobile\(hySatellite Service. The instructions should contain 
the full procedures. 
.RT
.sp 2P
.LP
\fB7\fR 	\fBInstructions for users at ship earth stations\fR 
.sp 1P
.RT
.PP
It would be beneficial if coast earth station operators and/or
INMARSAT provided user manuals defining the system capabilities and services
offered. The manuals should contain information such as:
.RT
.LP
	\(em
	general instructions for use of the INMARSAT services,
.LP
	\(em
	location of coast earth stations;
.LP
	\(em
	facilities provided and services supported by each coast
earth station;
.LP
	\(em
	selection procedures for setting up automatic calls;
.LP
	\(em
	selection procedures for operator assisted calls for each
coast earth station;
.LP
	\(em
	selection procedures for setting up calls to the services
listed in Annex\ A for each coast earth station;
.LP
	\(em
	other instructions which INMARSAT may feel useful or
important to users.
.bp
.ce 1000
ANNEX\ A
.ce 0
.ce 1000
(to Recommendation F.126)
.sp 9p
.RT
.ce 0
.ce 1000
\fBAllocation of telephone prefixes, telex access codes\fR 
.sp 1P
.RT
.ce 0
.ce 1000
\fBand data transmission prefixes\fR 
.ce 0
.PP
A.1
Administrations should make application for the allocation of
new prefixes and access codes to the CCITT Secretariat. The application 
should contain a definition for the service, termination or facility to 
be accessed. 
.sp 1P
.RT
.PP
The CCITT Secretariat would be responsible for coordinating the
allocation of new prefixes and access codes with the competent Study
Groups. The allocation of new prefixes and access codes should be done 
in such a way as to ensure that equivalent services carried by means of 
telephone, 
telex or data circuits are given the same prefix.
.PP
The prefixes and access codes to be used for automatic calling should be 
as follows: 
.RT
.LP
	\fITelephone\fR \ \(em\ For international calls the prefix should be 00
followed by the international telephone number of the called subscriber.
As an option, for national calls, the prefix\ 0 followed by the national
(significant) number of the called subscriber could be used.
.LP
	 \fINote\fR \ \(em\ In the Maritime Satellite Service only, the international 
format is preferred. 
.LP
	\fITelex\fR \ \(em\ For international calls the access code should be 00
followed by the international telex number of the called subscriber. As an
option for national calls the access code should be\ 0 followed by the 
national telex number of the called subscriber could be used. 
.LP
	 \fINote\fR \ \(em\ In the Maritime Satellite Service only the international 
format is recommended. 
.LP
	\fIData transmission\fR \ \(em\ For data calls through a 
public data
network
the format should always consist of the prefix\ 0 followed by the
international data number of the called subscriber (see Recommendation\ 
X.350, \(sc\ 5.2.1). 
.PP
A.2
Table A\(hy1/F.126 contains a list of prefixes and access codes
allocated up to the present time for access to special destinations, services 
or facilities. 
.sp 9p
.RT
.PP
A.3
The facilities are defined in Annex B.
.LP
.rs
.sp 20P
.ad r
Blanc
.ad b
.RT
.LP
.bp
.ce
\fBH.T. [1T4.126]\fR 
.ce
TABLE\ A\(hy1/F.126 (Note 1)
.ce
\fBAllocation of telephone prefixes,\fR 
.ce
\fBtelex access codes and data transmission prefixes\fR 
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
1 0 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
1
1
International outgoing operator
A
A
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
1
2
International information service
A
A
FS
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
1 3 National operator A A NA						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
1
4
National information service
A
A
FS
Operator
1
5
Radiotelegram service
FS
A
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
1 6 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
1
7
Booking of telephone calls (Note 4)
A
A
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
1 8 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
1 9 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
2
0
Access to maritime PAD (Note 5)
A
NA
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
2
1
Store\(hyand\(hyforward (international)
NA
A
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
2
2
Store\(hyand\(hyforward (national)
NA
A
NA
Automatic facilities
2
3
Abbreviated dialling (short code selection)
A
A
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
2
4
Telex letter service
NA
A
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
2
5
Access to PSPDN
(Note 8)
NA
(Note 8)
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
2 6	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
2 7 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
2 8	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
2 9	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
3 0 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
3 1 Maritime enquiries A A A						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
3
2
Medical advice
A
A
A
Specialized
3
3
Technical assistance
A
A
A
assistance
3
4
Person\(hyto\(hyperson call
A
NA
NA
(Note 6)
3
5
Collect calls
A
NA
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
3 6 Credit card calls A A NA						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
3
7
Time and charges requested at end of call
A
A
NA
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
3 8 Medical assistance A A A						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
3 9 Maritime assistance A A A						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
4 0 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
4
1
Meteorological reports
A
A
A
Ship
4
2
Navigational hazards and warnings
A
A
A
reporting
4
3
Ship position reports
A
A
A
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
4 4	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
4 5	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
4 6 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
4 7	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
4 8	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
4 9	\(em \(em \(em					
.TE
.nr PS 9
.RT
.ad r
\fBTableau A\(hy1/F.126 [1T4.126], p.9\fR 
.sp 1P
.RT
.ad b
.RT
.LP
.bp
.ce
\fBH.T. [2T4.126]\fR 
.ce
TABLE\ A\(hy1/F.126 \fI(cont.)\fR 
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
5 0 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
5
1
Meteorological forecasts
FS
FS
FS
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
5
2
Navigational warnings
FS
FS
FS
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
5
3
Videotex (international)
FS
NA
FS
Information
5
4
Videotex (national)
FS
NA
FS
retrieval
5
5
News (international)
FS
FS
FS
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
5 6 News (national) FS FS FS						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
5 7	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
5 8 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
5 9	 {
\(em
\(em
\(em
Specialized use (Note 7)
6
 }					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
Administration specialized use,
e.g. leased lines
A
A
FS
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
7	Spare \(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
8	Spare \(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
9 0 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
9
1
Automatic test line
A
A
FS
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
9 2 Commissioning tests A A A						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
9
3
Spare
\(em
\(em
\(em
Test
9
4
Spare
\(em
\(em
\(em
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
 {
9
5
Operational coordination
A
A
A
 }						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
9 6	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
9 7	\(em \(em \(em					
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
9 8 Spare \(em \(em \(em						
.T&
lw(30p) | lw(24p) | lw(24p) | lw(78p) | lw(24p) | lw(24p) | lw(24p) .
9 9	\(em \(em \(em					
.TE
.nr PS 9
.RT
.ad r
\fBTableau A\(hy1/F.126 (suite)+ notes [2T4.126], p.10\fR 
.sp 1P
.RT
.ad b
.RT
.LP
.bp
.ce 1000
ANNEX\ B
.ce 0
.ce 1000
(to Recommendation F.126)
.sp 9p
.RT
.ce 0
.ce 1000
\fBApplication of\fR 
\fBtelephone prefixes\fR \fB,\fR 
\fBdata transmission\fR \fBprefixes\fR 
.sp 1P
.RT
.ce 0
.ce 1000
\fBand\fR 
\fBtelex access codes\fR \fB\(em Definitions and\fR 
\fBdescriptions\fR 
.ce 0
.PP
Services and facilities normally provided by the telephone data or telex 
networks are otherwise defined in CCITT Recommendations and do not 
require any further definitions. This annex provides definitions and
descriptions of some of the special facilities of Annex\ A.
.sp 1P
.RT
.PP
\fINote\ 1\fR \ \(em\ The same annex is contained in Recommendation E.216.
.PP
\fINote\ 2\fR \ \(em\ In this annex the term prefix is used to designate 
telephone prefix, telex access code and data transmission prefix. 
.RT
.sp 2P
.LP
B.1
	\fIOperator\fR 
.sp 1P
.RT
.sp 1P
.LP
B.1.1
	\fBinternational outgoing operator (prefix 11)\fR 
.sp 9p
.RT
.PP
Prefix 11 will connect the caller to an international operator
position. The prefix may be followed by a country code. If so, the procedure
for servicing the call is described in \(sc\ 4.3.
.RT
.sp 1P
.LP
B.1.2
	\fBinternational information service (prefix 12)\fR 
.sp 9p
.RT
.PP
Prefix 12 will connect the caller to the international information service. 
The prefix may be followed by a country code. If so, the procedure for 
servicing the call is described in \(sc\ 4.3. 
.RT
.sp 1P
.LP
B.1.3
	\fBnational operator (prefix 13)\fR 
.sp 9p
.RT
.PP
Prefix 13 will connect the caller to a national or international operator 
position in the country where the coast earth station is located. The type 
of operator to be used is decided by the Administration. 
.PP
\fINote\fR \ \(em\ Prefix 13 may not be offered on all coast earth
stations.
.RT
.sp 1P
.LP
B.1.4
	\fBnational information service (prefix 14)\fR 
.sp 9p
.RT
.PP
Prefix 14 will connect the caller to a national or international operator 
position. The type of information service to be used is decided by the 
Administration. 
.PP
\fINote\fR \ \(em\ Prefix 14 may not be offered on all coast earth stations.
.RT
.sp 1P
.LP
B.1.5
	\fBradiotelegram service (prefix 15)\fR 
.sp 9p
.RT
.PP
Prefix 15 will connect the caller to the radio telegram service
position. The transmission of radio telegram should normally be made by 
radio telex only. The radio telegram service in this case should be arranged 
in such a way that automatic retransmission is possible. 
.RT
.sp 1P
.LP
B.1.6
	\fBbooking of telephone calls (prefix 17)\fR 
.sp 9p
.RT
.PP
Prefix 17 will allow the caller to book a telephone call via the telex 
service. 
.PP
This telex message will be routed to the relevant international (or
national) telephone operator.
.RT
.sp 2P
.LP
B.2\fR 	\fIAutomatic facilities\fR 
.sp 1P
.RT
.sp 1P
.LP
B.2.1
	\fBaccess to maritime PAD (prefix 20)\fR 
.sp 9p
.RT
.PP
Prefix 20 is used for gaining access to a packet
assembly/disassembly (PAD) facility in a packet switched public data network. 
The PAD is accessed via telephone circuits in the INMARSAT system. The 
prefix is followed by two additional digits indicating the required data 
rate (see 
Recommendation\ X.351).
.bp
.RT
.sp 1P
.LP
B.2.2
	\fBstore\(hyand\(hyforward (international) (prefix 21)\fR 
.sp 9p
.RT
.PP
Prefix 21 is used for gaining access to a store\(hyand\(hyforward unit 
(SFU) for international calls. 
.RT
.sp 1P
.LP
B.2.3
	\fBstore\(hyand\(hyforward (national) (prefix 22)\fR 
.sp 9p
.RT
.PP
Prefix 22 is used for gaining access to a store\(hyand\(hyforward
unit (SFU) for national calls.
.RT
.sp 1P
.LP
B.2.4
	\fBabbreviated dialling (short\(hycode selection) (prefix 23)\fR 
.sp 9p
.RT
.PP
Abbreviated dialling (short\(hycode selection) will allow the caller to 
make a connection by selecting a short special number (e.g.\ 2 or 3\ digits) 
instead of a full international (or national) number. 
.RT
.sp 1P
.LP
B.2.5
	\fBtelex letter service (prefix 24)\fR 
.sp 9p
.RT
.PP
Prefix 24 is used for directly transmitting a message originated from a 
ship earth station (SES) to a selected telegraph office for delivery by 
mail or any appropriate means. 
.RT
.sp 1P
.LP
B.2.6
	\fBaccess to PSPDN (prefix 25)\fR 
.sp 9p
.RT
.PP
Prefix 25 is used for obtaining access via INMARSAT telephone
circuits to a maritime satellite data switching exchange (MSDSE) (see
Recommendation\ X.350) for virtual call data services (Recommendation\ 
X.25). The prefix is followed by additional digits indicating data rate 
or other 
parameters associated with the call.
.RT
.sp 2P
.LP
B.3
	\fISpecialized assistance\fR 
.sp 1P
.RT
.sp 1P
.LP
B.3.1
	\fBmaritime enquiries (prefix 31)\fR 
.sp 9p
.RT
.PP
Prefix 31 may be used for special enquiries such as ship
location, authorization, all telegrams,\ etc.
.RT
.sp 1P
.LP
B.3.2
	\fBmedical advice (prefix 32)\fR 
.sp 9p
.RT
.PP
Prefix 32 provides connection to national medical facilities
(hospital, etc.) for obtaining medical advice or consultation. The prefix 
may be followed by a country code. 
.RT
.sp 1P
.LP
B.3.3
	\fBtechnical assistance (prefix 33)\fR 
.sp 9p
.RT
.PP
For the Maritime Satellite Service, prefix 33 provides connection to the 
technical personnel of the coast earth station in case difficulties are 
experienced in establishing communication. 
.PP
For other maritime systems, further study is required.
.RT
.sp 1P
.LP
B.3.4
	\fBperson\(hyto\(hyperson call (prefix 34)\fR 
.sp 9p
.RT
.PP
Prefix 34 should be used when the call is for a specific person at the 
called number. An operator will intervene in the call, and should be 
provided with the details of the person to be called. The prefix may be
followed by the number of the called party.
.RT
.sp 1P
.LP
B.3.5
	\fBcollect calls (prefix 35)\fR 
.sp 9p
.RT
.PP
Prefix 35 should be used for calls, charges for which will be
billed to the called party. The telephone operator will intervene in the
call and should be provided with the information pertinent to the call. The
prefix may be followed by the number of the called party.
.RT
.sp 1P
.LP
B.3.6
	\fBcredit card calls (prefix 36)\fR 
.sp 9p
.RT
.PP
Arrangements can be made with the Administration of certain coast stations 
or coast earth stations for payments for communication services to be made 
by a credit card. The arrangement is valid only for the services 
of the station with which it is made.
.PP
An operator will intervene in the call and should be provided with
details of the credit card. The prefix may be followed by the number of the
called party.
.bp
.RT
.sp 1P
.LP
B.3.7
	\fBtime and charges requested at end of call (prefix 37)\fR 
.sp 9p
.RT
.PP
Prefix 37 provides, upon completion of the call, either automatic printout 
of charging information, or connection to an operator who will supply charging 
information on the call. The prefix is followed by the number of the called 
party. 
.RT
.sp 1P
.LP
B.3.8
	\fBmedical assistance (prefix 38)\fR 
.sp 9p
.RT
.PP
If the condition of an ill or injured person aboard ship requires his urgent 
delivery ashore or the delivery of a doctor aboard ship, prefix\ 38 provides 
connection to the appropriate national authority responsible for this kind 
of activity. 
.RT
.sp 1P
.LP
B.3.9
	\fBmaritime assistance (prefix 39)\fR 
.sp 9p
.RT
.PP
Prefix 39 provides connection to the appropriate national
authority in case maritime assistance is required (e.g. tow, oil
pollution).
.RT
.sp 2P
.LP
B.4
	\fIShip reporting\fR 
.sp 1P
.RT
.sp 1P
.LP
B.4.1
	\fBmeteorological reports (prefix 41)\fR 
.sp 9p
.RT
.PP
Prefix 41 provides connection to the meteorological office
for transmission of ship weather reports.
.RT
.sp 1P
.LP
B.4.2
	\fBnavigational reports from ships (prefix 42)\fR 
.sp 9p
.RT
.PP
Prefix 42 provides connection to a navigational office for
transmission of information from ships on any hazards which could endanger
safety of navigation (e.g. wrecks, derelicts, floating obstructions, defective 
radiobeacons or light vessels, icebergs, floating mines,\ etc.). 
.RT
.sp 1P
.LP
B.4.3
	\fBship position reports (prefix 43)\fR 
.sp 9p
.RT
.PP
Prefix 43 provides connection to an appropriate national or
international centre collecting ship movement information for search and 
rescue (or other) purposes. 
.RT
.sp 1P
.LP
B.5
	\fIInformation retrieval services (prefixes 5x)\fR 
.sp 9p
.RT
.PP
Further study is required.
.RT
.sp 1P
.LP
B.6
	\fISpecialized use\fR (prefixes 6x)
.sp 9p
.RT
.PP
Further study is required.
.RT
.sp 1P
.LP
B.7
	\fI(Prefixes 7x are reserved for future use.)\fR 
.sp 9p
.RT
.sp 1P
.LP
B.8
	\fI(Prefixes 8x are reserved for future use.)\fR 
.sp 9p
.RT
.sp 2P
.LP
B.9
	\fITest\fR 
.sp 1P
.RT
.sp 1P
.LP
B.9.1
	\fBautomatic test line (prefix 91)\fR 
.sp 9p
.RT
.PP
Prefix 91 provides an automatic test of the ship earth station in telex 
and telephony mode. In the Maritime\(hySatellite Service the coast earth 
station will automatically transmit a \*QQUICK BROWN FOX\*U test message\fR 
for telex and provide a loop\(hyaround test line connection in accordance
with Recommendation\ Q.11 for telephony. Test lines for data transmission
are for further study.
.RT
.sp 1P
.LP
B.9.2
	\fBcommissioning tests (prefix 92)\fR 
.sp 9p
.RT
.PP
Prefix 92 is used in the Maritime\(hySatellite Service for conducting commissioning 
tests of ship earth stations. 
.RT
.sp 1P
.LP
B.9.3
	\fBoperational coordination (prefix 95)\fR 
.sp 9p
.RT
.PP
Prefix 95 is used in the Maritime\(hySatellite Service for
operational communications between management and maintenance elements 
of the system. 
.bp
.RT
.sp 2P
.LP
\fBRecommendation\ F.127\fR 
.RT
.sp 2P
.ce 1000
\fBOPERATIONAL\ PROCEDURES\ FOR\ INTERWORKING\ BETWEEN\ THE\ TELEX\fR 
.EF '%	Fascicle\ II.4\ \(em\ Rec.\ F.127''
.OF '''Fascicle\ II.4\ \(em\ Rec.\ F.127	%'
.ce 0
.sp 1P
.ce 1000
\fBSERVICE\ AND\ THE\ SERVICE\ OFFERED\ BY\ INMARSAT\ STANDARD\(hyC\ SYSTEM\fR 
.ce 0
.sp 1P
.LP
	The\ CCITT,
.sp 1P
.RT
.sp 1P
.LP
\fIconsidering\fR 
.sp 9p
.RT
.PP
(a)
that INMARSAT has introduced various maritime services
based on their Standard\(hyA, Standard\(hyB and Standard\(hyC systems;
.PP
(b)
that Recommendation F.120 specifies ship station
identification for the Maritime Mobile\(hySatellite Service;
.PP
(c)
that Recommendation F.125 specifies the numbering plan for the Maritime 
Mobile\(hySatellite Telex Service; 
.PP
(d)
that Recommendation F.126 specifies the selection
procedures for Maritime\(hySatellite Telex Service;
.PP
(e) 
that the provision of interworking with the telex service is a mandatory 
requirement of the INMARSAT Standard\(hyC system; 
.sp 1P
.LP
\fIunanimously recommends\fR 
.sp 9p
.RT
.PP
that operational procedures for interworking between the telex
service and the service provided by the INMARSAT Standard\(hyC system should 
be in accordance with this Recommendation. 
.sp 2P
.LP
\fB1\fR 	\fBDefinitions\fR 
.sp 1P
.RT
.PP
1.1
Ship earth station is defined in Article 1, Section 4.16 of the
\fIRadio Regulations\fR , ITU, Geneva\ 1982.
.sp 9p
.RT
.PP
1.2
Coast earth station is defined in Article 1, Section 4.14 of the \fIRadio 
Regulations\fR , ITU, Geneva\ 1982. 
.PP
1.3
\fBmaritime\(hysatellite store\(hyand\(hyforward unit (MSSFU)\fR is the
functional interface between the maritime\(hysatellite message transmission 
system and a public telex network. 
.sp 2P
.LP
\fB2\fR 	\fBScope\fR 
.sp 1P
.RT
.PP
2.1\fR The purpose of this Recommendation is:
.sp 9p
.RT
.LP
	a)
	to standardise procedures for the subscribers to a public
telex network calling ship earth stations in the maritime
satellite Standard\(hyC system;
.LP
	b)
	to standardise procedures for ship earth stations calling
subscribers in the public telex network;
.LP
	c)
	to standardise procedures for ship\(hyto\(hyship calls that
transit the public telex network.
.sp 2P
.LP
\fB3\fR 	\fBIntroduction\fR 
.sp 1P
.RT
.PP
3.1
The characteristics of the maritime satellite circuit provided by the INMARSAT 
Standard\(hyC System are such that only store\(hyto\(hystore operation 
is supported. 
.sp 9p
.RT
.PP
3.2
The present limitation means that the maritime\(hysatellite network provided 
by the INMARSAT Standard\(hyC system must be viewed as conceptually 
different from that provided by the INMARSAT Standard\(hyA system. As expressed 
in Recommendation\ F.126 for the Standard\(hyA system the terminals on\(hyboard 
ships may be viewed as belonging to the subscribers of a national (telephone, 
telex or 
packet) network, because normal international working is supported and is
so percieved by the users. However the network provided by Standard\(hyC system
cannot be viewed in this way because, in this case, the basic concept is 
that of interworking between different networks (where the MSSFU functions 
as an 
interworking unit).
.PP
3.3
A general description of the INMARSAT Standard\(hyC system and the
services it may support is given in a Supplement to the F\(hySeries
Recommendations.
.bp
.sp 2P
.LP
\fB4\fR 	\fBService outline\fR 
.sp 1P
.RT
.PP
4.1
Communication between subscribers of the telex service and a
ship\(hyearth station is on a store\(hyand\(hyforward basis. Thus, conversational 
mode interworking between terminals is not provided. 
.sp 9p
.RT
.PP
4.2
In the shore\(hyto\(hyship direction two modes of operation are
considered by this Recommendation. These are designated as one\(hystage and
two\(hystage selection. Administration/RPOAs may provide either or both 
modes of operation. 
.PP
These services may be extended across international borders on a bilateral 
basis. Where no such bilateral agreement exists the Administration 
operating the system may clear the call and return the service signal (NA).
.PP
4.3
In ship\(hyto\(hyshore direction subscribers to the Maritime\(hySatellite 
Service provided by the Standard\(hyC system may send single messages to 
the 
subscribers to the public telex network and to the appropriate Applications
(from the list shown in Table\ A\(hy1/F.126). The messages are forwarded by the
MSSFU via the public telex network.
.sp 9p
.RT
.PP
4.4
In the ship\(hyto\(hyship direction calls between different ocean
regions may be established via the international telex network and will 
follow the procedures for ship\(hyto\(hyshore calls. 
.PP
The procedures for calls between ships within the same ocean
region are not a matter for this Recommendation. See the Supplement No.\ 3 to
the F\(hySeries Recommendations.
.LP
\fB5\fR 	\fBOperational procedures\fR 
.sp 1P
.RT
.sp 2P
.LP
5.1
	\fIShore\(hyto\(hyship calls\fR 
.sp 1P
.RT
.sp 1P
.LP
5.1.1
	\fIOne\(hystage selection\fR 
.sp 9p
.RT
.sp 1P
.LP
5.1.1.1\ \ A terrestrial subscriber may place a call to the desired ship 
earth station using normal telex selection procedures with the designated 
telex 
destination code and the ship earth station number. Because it is an essential 
feature of this service that the called address is automatically passed 
forward by the telex network to the MSSFU, the subscriber achieves access 
to the unit and addresses the ship by a single stage of selection. 
.sp 9p
.RT
.LP
5.1.1.2\ \ A telex subscriber calling a ship earth station will select a
numbering sequence as follows:
.LP
	58S
	Telex destination code
.LP
	58S
4\ M\d1\uI\d2\uD\d3\uX\d4\u\ . |  | \ X\d8\u	INMARSAT, mobile
number
.LP
where 4 corresponds to the T\(hydigit and where at least the
digits\ M\d1\uI\d2\uD\d3\uX\d4\uX\d5\uX\d6\uare part of the ship station 
identity 
in accordance with Recommendation\ F.125.
.sp 1P
.LP
5.1.1.3\ \ On receipt of this address, the MSSFU should check that the
required ship is logged into the ocean region and should accept or reject 
the call accordingly. No call connect should be returned to the originating 
telex network until this check has been completed. The time period for 
the return of call connect and the subsequent answerback must be in accordance 
with the 
relevant U\(hySeries Recommendations.
.sp 9p
.RT
.PP
If this check fails, the appropriate service signal should be
returned to the originator in accordance with Recommendation\ F.131.
.sp 1P
.LP
5.1.1.4\ \ The MSSFU shall return the answerback associated with the called
ship earth station. The format of this answerback should be in accordance 
with Recommendation\ F.74. 
.sp 9p
.RT
.LP
5.1.1.5\ \ The answerback associated with the called ship earth station shall
always be returned in response to a WRU signal.
.LP
5.1.1.6\ \ The answerback of the calling telex subscriber should be determined 
at the establishment of the call using procedures in accordance with \(sc\ 
9 of 
Recommendation\ F.72.
.LP
5.1.1.7\ \ Where the calling answerback is not obtained at the beginning 
of the call, or if obtained but the determination of the calling address 
is not 
possible, the call should be cleared.
.bp
.PP
The call may be accepted where, in the event of non\(hydelivery of a message, 
alternative arrangements for delivery are provided. The alternative 
arrangements, for example, may be the provision of a manual operator position.
.sp 1P
.LP
5.1.1.8\ \ At the completion of text transmission the connection should be
cleared in accordance with normal telex procedures.
.sp 9p
.RT
.LP
5.1.1.9\ \ After the complete message has been received, the MSSFU shall 
attempt to deliver it at the earliest opportunity. However, the message 
should not be held for longer than 24\ hours in accordance with \(sc\ 3.3 
of Recommendation\ F.72. 
.LP
5.1.1.10\ \ In the event of non\(hydelivery of the message to the ship earth
station, a non\(hydelivery advice should be returned to the originating telex
subscriber. The content of the non\(hydelivery advice and procedures for its
transmission should be in accordance with \(sc\(sc\ 12, 13 and\ 14 of
Recommendation\ F.72.
.LP
5.1.1.11\ \ Telex selection information should be extracted from the calling
telex answerback in accordance with Recommendation\ U.74.
.LP
5.1.1.12\ \ The action to be taken when the MSSFU is unable to notify the
originator of the non\(hydelivery of their message is for further study.
.sp 2P
.LP
5.1.2
	\fITwo\(hystage selection\fR 
.sp 1P
.RT
.sp 1P
.LP
5.1.2.1\ \ The subscribers should use normal telex call establishment
procedures to access the MSSFU, which is allocated a national number for 
this purpose. 
.sp 9p
.RT
.LP
5.1.2.2\ \ Principles and procedures for access to the MSSFU shall be in
accordance with \(sc\(sc\ 6 and\ 7 of Recommendation\ F.72.
.LP
5.1.2.3\ \ The information field content for the address line should be in
accordance with \(sc\ 8 of Recommendation\ F.72.
.LP
5.1.2.4\ \ Enhanced Group Call facilities of the INMARSAT Standard\(hyC system
enable authorised users to send a message simultaneously to a number of ship
earth stations which have been specially equipped. Where Enhanced Group Call
facilities are provided, by the MSSFU, an additional five address attributes
will be contained in the address line. These attributes (abbreviated addresses) 
are known as C\(hycodes and will follow immediately after the end of address 
delimiter, Combination No.\ 26, with each C\(hycode being delimited by a
Combination No.\ 3. The address line will be terminated by the End of Address
(EOA) signal in accordance with Recommendation\ F.72.
.PP
The general structure of the C\(hycodes is defined in Supplement
No.\ 3 to the F\(hySeries Recommendations.
.sp 1P
.LP
5.1.2.5\ \ MSSFU access protocols shall be in accordance with
Recommendation\ U.80. However, where the MSSFU acts only as an interface 
between the maritime message transmission system and a public telex network, 
only the INMARSAT mobile number need be input in the address field. 
.sp 9p
.RT
.LP
5.1.2.6\ \ If the calling address cannot be determined from the calling
subscriber's answerback for the purpose of delivering a non\(hydelivery advice,
the call should be cleared.
.PP
The call may be accepted where, in the event of non\(hydelivery of a message, 
alternative arrangements for delivery are provided. The alternative 
arrangements, for example, may be the provision of an operator position.
.sp 2P
.LP
5.1.3
	\fIAbnormal conditions\fR 
.sp 1P
.RT
.sp 1P
.LP
5.1.3.1\ \ The action to be taken when abnormal conditions are encountered
during message input shall be in accordance with \(sc\ 10 of Recommendation\ 
F.72 
where applicable.
.sp 9p
.RT
.sp 2P
.LP
5.2
	\fIShip\(hyto\(hyshore calls\fR 
.sp 1P
.RT
.PP
5.2.1 
Shipboard subscribers to the Maritime\(hySatellite Service provided by 
the Standard\(hyC system may send messages to the subscribers to public 
telex networks. 
.sp 9p
.RT
.PP
5.2.2
The messages are forwarded by the MSSFU to the addressed telex
subscriber via the public telex network.
.PP
5.2.3
Upon delivery of the message to the telex destination, a delivery notification 
should be sent to the ship. In the event of non\(hydelivery of the 
message to the telex destination, the action to be taken is not the subject 
for international standardisation. 
.PP
5.2.4
The procedures for call establishment and delivery to the telex
destination should be in accordance with \(sc\(sc\ 12, 13 and\ 14 of
Recommendation\ F.72.
.bp
.sp 2P
.LP
5.3
	\fIShip\(hyto\(hyship calls\fR 
.sp 1P
.RT
.PP
5.3.1 
A shipboard subscriber to the Maritime\(hySatellite Service provided by 
the Standard\(hyC system may send a message to a subscriber aboard another 
ship.
.sp 9p
.RT
.PP
5.3.2
Where the call is to a ship in a different ocean region and the
call transits the public telex network, the call procedures shall be in
accordance with the ship\(hyto\(hyshore procedures set out in \(sc\ 5.2 above.
.PP
In cases where the call is to a Standard\(hyC ship earth station in the 
destination ocean region and the destination MSSFU does not support 
one\(hystage selection, the procedures to be used are for further study.
.PP
5.3.3 
The procedures for calls between shipboard subscribers in the same ocean 
region are not a subject for this Recommendation. See Supplement No.\ 3 
to the F\(hySeries Recommendations. 
\v'1P'
.sp 9p
.RT
.sp 2P
.LP
\fBRecommendation\ F.130\fR 
.RT
.sp 2P
.sp 1P
.ce 1000
\fBMARITIME\ ANSWER\(hyBACK\ CODES\fR 
.EF '%	Fascicle\ II.4\ \(em\ Rec.\ F.130''
.OF '''Fascicle\ II.4\ \(em\ Rec.\ F.130	%'
.ce 0
.sp 1P
.LP
	The\ CCITT,
.sp 1P
.RT
.sp 1P
.LP
\fIconsidering\fR 
.sp 9p
.RT
.PP
(a)
that it is technically feasible to interconnect certain
radiocommunication systems in the Maritime Mobile Service
.FS
As in
Recommendations\ F.110 and F.111, the term Maritime Mobile Service is intended 
to include also the Maritime Mobile\(hySatellite Service. 
.FE
with the
international telex network
in order to provide a 
radiotelex service
between ships and telex
subscribers, in accordance with Recommendation\ F.110;
.PP
(b)
that Recommendation F.60 specifies the operational
provisions for the international telex service, and in particular, for the
composition of answer\(hyback codes;
.PP
(c)
that, since no single Administration is responsible for
the allocation of answer\(hyback codes to ships in the way that such codes are
administered in individual national telex networks, some rules further 
to those set down in Recommendation\ F.60 are desirable, for example to 
facilitate 
automatic operation in the ship\(hyto\(hyshore direction and to simplify 
the handling of inquiries concerning calls to or from ships; 
.PP
(d)
that, to the extent possible, the alphabetic portion
of maritime answer\(hyback codes should provide a means for detecting possible
mutilation of the numerical portion, particularly in the case of ship\(hyto\(hyshore 
calls where it may be used for charging and accounting purposes, 
.sp 1P
.LP
\fIunanimously declares\fR 
.sp 9p
.RT
.PP
that, at least in cases where interconnection with the international telex 
network is desired, answer\(hyback codes generated by 
teleprinters
(or equivalent terminal devices) on ships shall comply with the following
requirements.
.RT
.PP
\fB1\fR Regardless of the transmission medium used (e.g.\ maritime\(hymobile
satellite, HF \*Qdirect printing\*U, VHF), the answer\(hyback code, as 
printed out for a distant subscriber, shall include the following three 
components in the order indicated: 
.sp 9p
.RT
.LP
	a)
	the \*Qship station's number\*U of 6, 7, 8 or 9 digits (see \(sc\ 2
below);
.LP
	b)
	the \*Qship's (abbreviated) name\*U of 4 letters (see \(sc\ 3 below);
.LP
	c)
	the letter X, preceded by a space, as a \*Qtelex network
identification code\*U reserved for mobile stations (see
Recommendation\ F.68).
.bp
.PP
\fB2\fR The 6, 7, 8 or 9 digits of the ship station's number are those
allocated by the licensing Administration in accordance with
Recommendation\ F.120 but with the final 3, 2 or 1 zeroes deleted for 6, 7 or
8\(hydigit numbers respectively.
.sp 9p
.RT
.PP
\fB3\fR The letters comprising the ship's (abbreviated) name [\(sc\ 1b)
above] should be chosen with the guidance and under the control of the
licensing Administration with a view not only to identifying the ship (or 
the company, or the fleet, as is most appropriate) in a clear manner for 
a distant subscriber, but also to providing a means for checking the ship 
station's 
number as recorded in the answer\(hyback code. The name should not include 
shifts, figures or signs. Where a ship has been allocated a 6, 7 or 8\(hydigit 
number, in principle the ship's (abbreviated) name should not need to be 
changed when the numbering plan is modified to incorporate 7, 8 or 9\(hydigit 
numbers. 
.sp 9p
.RT
.PP
\fB4\fR The series of twenty combinations in International Telegraph
Alphabet No.\ 2 comprising the answer\(hyback code shall be allocated as
follows:
.sp 9p
.RT
.LP
	a)
	figure\(hyshift, or (if permanently fitted) letter\(hyshift;
.LP
	b)
	carriage\(hyreturn;
.LP
	c)
	line\(hyfeed;
.LP
	d)
	 the ship station's number, or (if a letter\(hyshift is fitted in the 
first position) figure\(hyshift followed by the ship station's number; 
.LP
	e)
	letter\(hyshift;
.LP
	f
)
	space, which should however be omitted if both the
ship station's number consists of 8\ digits and a letter\(hyshift is fitted 
in the first position; 
.LP
	g)
	the ship's (abbreviated) name;
.LP
	h)
	space;
.LP
	i)
	if necessary, a letter\(hyshift or letter\(hyshifts to bring the
total number of combinations in the answer\(hyback code up to twenty;
.LP
	j
)
	the letter X;
.LP
	k)
	letter\(hyshift (if permanently fitted).
.PP
\fB5\fR The technical requirements for answer\(hyback generators are laid
down in Recommendation\ S.6.
.sp 9p
.RT
.PP
\fB6\fR In accordance with Recommendation S.6, it is preferred that
teleprinters having all 20\ positions in the answer\(hyback which are freely
assignable should be used in the future, i.e.\ where the first position is a
figure\(hyshift and the last the letter\ X. In the meantime, teleprinters 
that have a letter\(hyshift permanently fitted in the first and last positions 
of the 
answer\(hyback code may be used where the ship station's number does not exceed
8\ digits.
.sp 9p
.RT
.sp 2P
.LP
\fBRecommendation\ F.131\fR 
.RT
.sp 2P
.sp 1P
.ce 1000
\fBRADIOTELEX\ SERVICE\ CODES\fR 
.EF '%	Fascicle\ II.4\ \(em\ Rec.\ F.131''
.OF '''Fascicle\ II.4\ \(em\ Rec.\ F.131	%'
.ce 0
.sp 1P
.LP
	The\ CCITT,
.sp 1P
.RT
.sp 1P
.LP
\fIconsidering\fR 
.sp 9p
.RT
.PP
(a)
that it is technically feasible to interconnect certain radiocommunication 
systems in the Maritime Mobile Service and the Maritime 
Mobile\(hySatellite Service with the international telex network in order to
provide a 
radiotelex service
between ships and telex subscribers in
accordance with Recommendation\ F.110;
.PP
(b)
that Recommendation F.60 specifies the code expressions used for service 
correspondence in the international telex service; 
.PP
(c)
that whilst it is desirable for the same service code
expressions to be used in the radiotelex service as in the international 
telex service, because of the nature of the service the reasons for the 
uses of these codes may vary; 
.PP
(d)
that agreement as to the circumstances when specific
codes are used is desirable,
.bp
.sp 1P
.LP
\fIrecommends the following\fR 
.sp 9p
.RT
.PP
(1)
In general for shore\(hyto\(hyship calls the telex service
codes specified in Recommendation\ F.60 should be used. However, the telex
service codes listed below should be used by the radiotelex service in the
following circumstances:
.LP
	\fBABS\fR 	\(em
	\fIAbsent subscriber/office closed\fR \ (to be used when radio
contact cannot be established,\ i.e. radio equipment is
faulty, the ship is outside the coverage area or the
terminal is turned off);
.LP
	\fBDER\fR 	\(em
	\fIOut of order\fR \ (to be used when the radio path and
associated handshaking procedure is accomplished normally
but the teleprinter fails to respond to the \fBWRU\fR signals);
.LP
	\fBNC\fR 	\(em
	\fINo circuits\fR \ (to be used when congestion occurs in either
the network or switching equipment);
.LP
	\fBNP\fR 	\(em
	\fIThe called party is not or is no longer a subscriber\fR \ (to
be used when the ship number received is invalid);
.LP
	\fBNA\fR 	\(em
	\fICorrespondence with this subscriber is not admitted\fR \ (to
be used if the ship's number is barred or if unauthorized
group calls are attempted);
.LP
	\fBOCC\fR 	\(em
	\fISubscriber engaged\fR \ (to be used if the ship station is
engaged).
.PP
\fINote\fR \ \(em\ See also Recommendation U.61\ [1].
.PP
(2)
For ship\(hyto\(hyshore calls all service codes generated in the international 
telex service, as specified in Recommendation\ F.60, should be capable 
of being returned and presented to the calling ship subscriber. 
.sp 2P
.LP
	\fBReference\fR 
.sp 1P
.RT
.LP
[1]
	CCITT Recommendation \fIDetailed requirements to be met in\fR 
\fIinterfacing the international telex network with maritime satellite\fR 
\fIsystems\fR , Recommendation\ U.61.
\v'2P'
.sp 2P
.LP
\fBRecommendation\ F.140\fR 
.RT
.sp 2P
.sp 1P
.ce 1000
\fBPOINT\(hyTO\(hyMULTIPOINT\ TELECOMMUNICATION\ SERVICE\ VIA\ SATELLITE\fR 
.EF '%	Fascicle\ II.4\ \(em\ Rec.\ F.140''
.OF '''Fascicle\ II.4\ \(em\ Rec.\ F.140	%'
.ce 0
.sp 1P
.LP
	The\ CCITT,
.sp 1P
.RT
.sp 1P
.LP
\fIconsidering\fR 
.sp 9p
.RT
.PP
(a)
the need for a point\(hyto\(hymultipoint telecommunication
service;
.PP
(b)
the loss of the HF multi\(hydestinational Press broadcast
service for this purpose;
.PP
(c)
the availability of satellites for point\(hyto\(hymultipoint
telecommunications services on a regional and world\(hywide basis;
.PP
(d)
the availability of a multiplicity of earth station
sizes;
.PP
(e)
the need for a clarification in terms of the functional
elements of this service;
.PP
(f
)
the need for the flexibility of their implementation in order to adapt 
to the needs of all Administrations, 
.sp 1P
.LP
\fIrecommends\fR 
.sp 9p
.RT
.PP
the following operational guidelines and Quality of Service
requirements for an international point\(hyto\(hymultipoint telecommunication 
service via satellite. 
.bp
.sp 2P
.LP
\fB1\fR 	\fBScope\fR 
.FS
Multipoint\(hyto\(hypoint and two\(hyway multiple access services are not 
addressed in this Recommendation, and are subject to further 
study.
.FE
.sp 1P
.RT
.PP
This Recommendation provides operational guidelines and Quality of Service 
requirements for an international one\(hyway point\(hyto\(hymultipoint 
telecommunication service via satellite. See Recommendation\ D.185 for the
general tariff and accounting principles for the international
point\(hyto\(hymultipoint telecommunication service via satellite.
.RT
.sp 1P
.LP
1.1
	\fIDefinition of service\fR 
.sp 9p
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The \fBinternational point\(hyto\(hymultipoint telecommunication service 
via satellite\fR is defined as a service provided to a customer by 
Administrations for the transmission for example, of text, photographs 
or data via a satellite for the reception at a multiplicity of destinations 
by 
receive\(hyonly earth stations.
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\fB2\fR 	\fBService description\fR 
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2.1
	\fIFunctional elements of service\fR 
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A point\(hyto\(hymultipoint telecommunication service via satellite
includes the seven following elements (see Figure\ 1/F.140);
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	1)
	the provider(s) of information;
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	2)
	the link between the provider(s) and the control management
centre;
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	3)
	the control management centre which uses various
transmission means in order to collect, address, and multiplex
the information from the provider(s);
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	4)
	the transmit earth station(s);
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	5)
	the transponder of a satellite(s);
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	6)
	one or several receive earth stations;
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	7)
	the link(s) from the receive earth station(s) to the user(s)
equipment.
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2.2
	\fIService provision\fR 
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The service may be provided on either a full time 24\(hyhour basis, a scheduled 
part\(hytime basis (e.g., five hours per day), or occasional use basis 
(e.g., a special event), subject to such terms as may be agreed between 
Administrations.
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2.3
	\fITypes of service\fR 
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The service may be provided:
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	a)
	in the form of one or more analogue channels, the bandwidth
of which may lie anywhere within the maximum available bandwidth
of one transponder, or
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	b)
	in the form of one or more digital channels operating at any
speed within the maximum available digital capacity of one
transponder.
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2.4
	\fIAreas of service coverage\fR 
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The service may be provided on a regional or global basis depending on 
customer requirements and satellite capability. 
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2.5
	\fIService configurations\fR 
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As illustrated in Figure 1/F.140, there are seven (7) functional
elements in the provision of a point\(hyto\(hymultipoint telecommunication 
service 
via satellite. Owing to the need for flexibility, the systems may be adapted 
to a diversity of needs and the regulations of each Administration involved. 
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The conditions of use of the transmit (4) and receive (6) earth
stations and the links\ (2) conveying the information flow remain a national
matter to be determined by the competent authority in each country.
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The conditions of use of the 
space segment
(5) are defined by the organizations (INTELSAT, EUTELSAT,\ etc.) in charge 
of their provision and by whatever agreements on coordination made by the 
competent international 
organizations.
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The control management centre (3) for the service may be located
and/or operated with the transmit earth station, the provider of the
information or independently of these two entities.
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\fB3\fR 	\fBQuality of Service\fR 
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The efficiency of operation and therefore the Quality of Service
provided to the users are linked to the relationship of all parties which
contribute to the provision of the service, i.e.\ the technical equipment and
the entities in charge of their operation. Quality of Service parameters and
values are for further study based on operational experience.
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3.1
	\fIService availability\fR 
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Service availability is the ratio of aggregate time during which
satisfactory or tolerable service is or could be provided, to the total
observation period (Recommendation\ X.140, definition).
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As this availability of service depends on the class of space segment, 
the earth station configurations, the propagation and interference effects 
and the bit error ratio required, it is not possible to specify a service 
availability requirement for all point\(hyto\(hymultipoint telecommunication 
services via satellite. The service availability for each customer will 
have to be 
calculated on an individual case basis considering all the points mentioned
above.
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\fB4\fR 	\fBAccess\fR 
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4.1
	\fITransmit\fR 
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The point of interconnection to the service may be located at the providers' 
location or on the Administrations' premises. When the point of 
interconnection to the service is located on the Administrations' premises,
the providers' access may be via a lease circuit or a public switched
network.
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4.2
	\fIReceive\fR 
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The receive earth station(s) may be located on the users premises or at 
Administrations' premises. Where the receive earth stations are located 
at the Administration's premises, access to the user should be via direct 
connection. The user of a public switched network is for further study.
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\fB5\fR 	\fBClasses of space segment\fR 
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Services offered may take account of classes of space segment
available from the space segment provider(s). The following classes of space
segment may be utilized to provide service:
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	a)
	 \fInon\(hypre\(hyemptible\fR \ \(em\ A service which may not be interrupted 
or terminated for the provision of a service to 
another customer. There are two types of non\(hypre\(hyemptible
service:
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	1)
	protected\ \(em\ A service for which restoration is
guaranteed; and
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	2)
	unprotected\ \(em\ A service for which restoration is not
guaranteed and which may only be restored subject to
availability of an alternate facility;
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	b)
	\fIpre\(hyemptible\fR \ \(em\ A service which may be interrupted to
provide a service of higher priority.
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Blanc
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.rs
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\fBFigure 1/F.140, p.11\fR 
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\fBMONTAGE: PAGE 258 = PAGE BLANCHE\fR 
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