TABLE 1/Q.791

Monitoring and measurements for Signalling System No. 7

networks MTP - signalling link performance

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

1.1	Duration of Link in the In-Service State

secs/SL b)

O	A	M

30 min.

2

Yes

perm.

1.2	SL Failure-All Reasons

event/SL

M

on occur.

2

Yes

1.3	SL Failure-Abnormal - FIBR/BSNR

event/SL

M

on occur.

2

No

perm.Q.703, S

5.3 1.4	SL Failure-Excessive delay of ack.

event/SL

M

on occur.

2

No

Q.703, S 5.3.1 1.5	SL Failure-Excessive error rate

event/SL

M

on occur.

2

No

Q.703, S 11.2.2 1.6	SL Failure-Excessive duration of congestion

event/SL

M

on occur.

2

No

Q.703 1.7	SL alignment failure

events/SL

M

30 min.

2

No

Q.703, S 11.3 1.8	Number of Signal Units in error c)

events/SL

M

30 min.

2

Yes

perm.Q.703, S

4 1.9	Number of negative ack. received

events/SL

M

30 min.

2

No

1.10	Local Automatic changeover

events/SL event/SL

O	M

30 min.

on occur.

3

3

No

No

Q.704, S

5 1.11	Local Automatic changeback

event/SL

O	M

on occur.

3

No

Q.704, S

6 1.12	SL Restoration

event/SL

M

on occur.

3

No

Q.703, S 3.2.3

a)	See S 3.1.2 (applies to all tables).

b)	SL = Signalling Link.

c)	The interpretation of this count is implementation dependant.

TABLE 2/Q.791

Monitoring and measurements for Signalling System No. 7

networks - MTP signalling link availability

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

2.1	Duration of SL unavailability (for any reason)

secs/SL

O	A	M

30 min.

3

Yes

perm.

2.2-2.4 Deleted

2.5	Duration of SL inhibition due to local management actions

secs/SL

M

30 min.

3

No

Q.704, S 3.2.8 2.6	Duration of SL inhibition due to remote management actions

secs/SL

M

30 min.

3

No

Q.704, S 3.2.8 2.7	Duration of SL unavailability due to link failure

secs/SL

M

30 min.

3

No

Q.704, S 3.2.2 2.8	Deleted.

2.9	Duration of SL unavailability due to remote processor outage

secs/SL

O	M

30 min.

3

No

Q.704, S 3.2.6 2.10	Start of remote processor outage

event/SL

O	M

on occur.

3

No

Q.704, S 3.2.6 2.11	Stop of remote processor outage

event/SL

O	M

on occur.

3

No

Q.704, S 3.2.7 2.12	Deleted

2.13	Local Management Inhibit

events/SL events/SL

O	M

30 min.

5 min.

3

3

No

No

Q.704, S 10.2 2.14	Local Management Uninhibit

events/SL events/SL

O	M

30 min.

5 min.

3

3

No

No

Q.704, S 10.3 2.15	Duration of Local Busy

secs/SL

O

30 min.

2

No

Q.704, S 9.3

TABLE 3/Q.791

Monitoring and measurements for Signalling System No. 7 networks

MTP signalling link utilization

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

3.1	Number of SIF and SIO octets transmitted

octets/SL

O	A	M

30 min.

3/2

Yes

act.

Q.703, S 2.3.8

3.2	Octets retransmitted

octets/SL

A

30 min.

2

No

Q.703, S

5 3.3	Number of message signal units transmitted

MSUs/S

A

30 min.

3/2

No

3.4	Number of SIF and SIO octets received

octets/SL

O	A	M

30 min.

3/2

Yes

act. 3.5	Number of message signal units received

MSUs/SL

A

30 min.

3/2

No

3.6	SL congestion indications

events/SL events/SL event/SL

O	A	M

O

30 min.

5 min.

on occur.

No

No

No

Q.704, S 3.8 3.7	Cumulative duration of SL congestion

secs/SL

O	A	M

30 min.

3

No

3.8	Deleted

3.9	Stop of SL congestion

event/SL

O

on occur.

3

No

3.10	MSUs discarded due to SL congestion

MSUs/SL

O

30 min.

3

Yes

perm. 3.11	Number of congestion events resulting in loss of MSUs

events/SL event/SL

O	M

30 min.

on occur.

3

3

No

No

TABLE 4/Q.791

Monitoring and measurements for Signalling System No. 7 networks

MTP signalling link set and route set availability

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

4.1	Deleted

4.2	Duration of unavailability of signalling linkset

secs/linkset

O	M

30 min.

3

No

4.3	Start of linkset failure

event/linkset

O	M

on occur.

3

No

4.4	Stop of linkset failure

event/linkset

O	M

on occur.

3

No

4.5	Initiation of broadcast TFP due to failure of measured linkset a)

event/linkset

O	M

on occur.

3

No

Q.704, S

13 4.6	Initiation of broadcast TFA for recovery of measured linkset a)

event/linkset

O	M

on occur.

3

No

Q.704, S

13 4.7 - 4.8 Deleted

4.9	Unavailability of route set to a given destination of set of destinations

events/destin

a-tion(s)

O	A	M

30 min.

3

b)

perm.Q.704, S

11.2.1 4.10	Duration of unavailability in 4.9

secs/destinat

ion(s)

O	A	M

30 min.

3

b)

perm.Q.704, S

11.2.2 4.11	Start of unavailability in 4.9

event/destina

tion(s)

O	M

on occur.

3

No

Q.704, S 11.2.1 4.12	Stop of unavailability in 4.9

event/destina

tion(s)

O	M

on occur.

3

No

Q.704, S 11.2.2

a)	These measurements only apply to Signal Transfer Points.

b)	These measurements are only obligatory in the international network.

TABLE 5/Q.791

Monitoring and measurements for Signalling System No. 7 networks

MTP adjacent signalling point status accessibility

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

5.1	Adjacent SP inaccessible

event/SP

O	M

M

on occur.

30 min.

5 min.

3

Yes

perm.

5.2	Duration of adjacent SP inaccessible

events/SP

secs/SP

O

O

5 min.

30 min.

3

Yes

perm. 5.3	Deleted

M

5.4	Stop of adjacent SP inaccessible

event/SP

O	M

on occur.

3

No

5.5	MSU discarded due to a routing data	error a)

MSUs/SP

A

O	M

30 min.

5 min.

Yes

No

perm.

perm.Q.795

a)	The number of MSUs discarded can be used to trigger the MTP Route Verification Test (MVRT) described in Recommendation Q.795, S 2.3.

TABLE 6/Q.791

Monitoring and measurements for Signalling System No. 7 networks

MTP signalling link traffic distribution (Signalling route utilization)

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

6.1	Number of SIF and SIO octets received with given OPC

octets/OPC

A

30 min.

3

No

6.2	Number of SIF and SIO octets transmitted with given DPC

octets/DPC

A

30 min.

3

No

6.3	Number of SIF and SIO octets handled with given SIO

octets/SIO

A

30 min.

3

No

6.4	Number of SIF and SIO octets received with given OPC and SIO

octets/SIO/

OPC

A

30 min.

3

No

6.5	Number of SIF and SIO octets transmitted with given DPC and SIO

octets/SIO/

DPC

A

30 min.

3

No

6.6	Number of SIF and SIO octets handled with given OPC, DPC and SIO

octets/SIO/

OPC/DPC

A

30 min.

3

No

Note 1 - Activation of these measurements is recommended on per point code or sets of point codes and/or SIO.

Note 2 - Some of these measurements may be of interest for accounting purposes.

TABLE 7/Q.791

Monitoring and measurements for Signalling System No. 7 networks

SCCP performance

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

7.1	Routing Failure - No translation for address of such nature a)

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.

Q.714, S 2.4

7.2	Routing Failure - No translation for this specific address a)

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

2.4 7.3	Routing Failure - Network Failure (Point Code not available)

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

2.4 7.4	Routing Failure - Network Congestion

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

2.4 7.5	Routing Failure - Subsystem Failure (unavailable)

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

2.4 7.6	Routing Failure - Subsystem Congestion b)

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

2.4 7.7	Routing Failure - Unequipped user (Subsystem)

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

2.4 7.8	Syntax error detected

event

msgs

M

M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

4.3 7.9	Routing Failure - Reason unknown

event

msgs

O

A	M

on occur.

30 min.

SCCP

SCCP

Yes

act.

perm.Q.714, S

2.4

a)	These measurements only required at SCCP nodes with global title translation capabilities.

b)	For further study.

TABLE 8/Q.791

Monitoring and measurements for Signalling System No. 7 networks

sub-system availability

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

8.1	Start of local SCCP unavailable failure a)

event

O

on occur.

SCCP

No

perm.

8.2	Start of local SCCP unavailable - maintenance made busy a)

event

O

on occur.

SCCP

No

perm. 8.3	Start of local SCCP unavailable - congestion a)

event

O

on occur.

SCCP

No

perm. 8.4	Stop of local SCCP unavailable - (all reasons) a)

event

O

on occur.

SCCP

No

perm. 8.5	Duration of local SCCP unavailable - (all reasons) a)

secs

A

30 min.

SCCP

No

perm. 8.6	Subsystem out-of-service request granted

event

M

on occur.

SCCP

b)

perm.Q.714, S

5.3.5.3 8.7	Subsystem out-of-service request denied

event

M

on occur.

SCCP

b)

perm.Q.714, S

5.3.5.3

a)	These measurements are system architecture dependent.

b)	These measurements are obligatory for replicated systems.

TABLE 9/Q.791

Monitoring and measurements for Signalling System No. 7 networks

SCCP - Utilization

Description of measurements

Units

Usage

O	A	M

Duration of measurement

Level

Obligator

y a)

Act. perm.

References

9.1	UDTS message sent

msgs

O	A

30 min.

SCCP

No

perm.

Q.714, S 4.2

9.2	UDTS message received

msgs

O	A

30 min.

SCCP

No

perm.

Q.714, S 4.2

9.3	Total messages handled (from local or remote subsystems)

msgs

A

30 min.

SCCP

No

perm.Q.714, S

2.3 9.4	Total messages intended for local subsystems

msgs

A

30 min.

SCCP

No

perm.Q.714, S

2.3 9.5	Messages requiring global title translation a)

msgs

A

30 min.

SCCP

No

perm.Q.714, S

2.2 9.6	Total messages sent (for connectionless only) (by class 0, 1)

msgs/class

A

30 min.

SCCP

Yes

perm.Q.714, S

1.1.2 9.7	Total messages received (for connectionless only) (by class 0, 1)

msgs/class

A

30 min.

SCCP

Yes

perm.Q.714, S

1.1.2 9.8	Messages sent to a backup subsystem

msgs/SS

A

30 min.

SCCP

Note b)

perm.Q.714, S

5.3.2

a)	This measurement is only required at SCCP nodes with global title translation capabilities.

b)	This measurement is obligatory for replicated systems.