MTP LEVEL 2

TEST NUMBER:	5.5	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 2	STD:	Fig. 11			
TITLE:	SU delimitation, alignment, error detection and correction			
SUB TITLE:	Reception of single and multiple flags between MSUs			
PURPOSE:	To check that single and multiple flags between MSUs can be received			
PRE–TEST CONDITIONS:	Link in service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
Link	Link		
1 – 0	FISU	 ---------------------------->		
	case 1	MSU F MSU		
	case 2	MSU F F MSU
 n( ³ 2)					F:	Flag
				n=number of flags	
1 – 0	FISU	 ---------------------------->		
			
TEST DESCRIPTION			
1.	Check that single and n flags, case 1 and case 2 respectively, can be received.		

MTP LEVEL 2

TEST NUMBER:	6.1	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 10.2	STD:	Fig. 11, Fig. 18, Fig. 8			
TITLE:	SUERM check			
SUB TITLE:	Error rate of 1 in 256 – Link remains in service			
PURPOSE:	To check the SUERM at a link error rate of 1 in 256 units			
PRE–TEST CONDITIONS:	Link in service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
Link	Link		
	<--------------------------	1 – 0	FISU	
1 – 0	FISU	---------------------------->		
	½
Ct	½  :  corrupt 1
	½  : in 256
	½			
			
TEST DESCRIPTION			
1.	Check that “In service” state is maintained. The test should run for several minutes.		
2.	Ct = the count of corrupted FISUs.		
	Note – 1)	The number (x) of corrupt signal units before an SIOS returned is calculated according to the following formula (a = number of correct signal units):		
		x = for a < 256		
		2)In this case as a = 255, so x = infinity.		

MTP LEVEL 2

TEST NUMBER:	6.2	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 10.2	STD:	Fig. 11, Fig. 18, Fig. 8			
TITLE:	SUERM check			
SUB TITLE:	Error rate of 1 in 254 – Link out of service			
PURPOSE:	To check the SUERM at a link error rate of 1 in 254 units			
PRE–TEST CONDITIONS:	Link in service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
Link	Link		
	<---------------------------	1 – 0			FISU	
1 – 0	FISU	 ---------------------------->		
	½
	½  : corrupt 1
	½  : in 254
Ct	½			
	<---------------------------	1 – 0			SIOS	
			
TEST DESCRIPTION			
1.	SIOS should be returned after approx. 8192 corrupt FISUs (eg. CRC error).		
2.	Ct = the count of corrupted FISUs.		

MTP LEVEL 2

TEST NUMBER:	6.3	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 10.2	STD:	Fig. 11, Fig. 18, Fig. 8			
TITLE:	SUERM check			
SUB TITLE:	Consecutive corrupted SUs			
PURPOSE:	To test the SUERM on consecutive corrupted signal units			
PRE–TEST CONDITIONS:	Link in service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
Link	Link		
	<--------------------------	1 – 0			FISU	
1 – 0	FISU	 --------------------------->		
	½
	½  : corrupt 1
	½  : in 1
Ct	½
			
	<-------------------------- 	1 – 0			SIOS	
			
TEST DESCRIPTION			
1.	SIOS should be returned after approx. 64 corrupt FISUs (eg. CRC error).		
2.	Ct = the count of corrupted FISUs.		

MTP LEVEL 2

TEST NUMBER:	6.4	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 10.2 	STD:	Fig. 11, Fig. 18			
TITLE:	SUERM check			
SUB TITLE:	Time controlled break of the link			
PURPOSE:	To check response to a range of time controlled breaks of Tx or Rx			
PRE–TEST CONDITIONS:	Link in service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
Link	Link		
	<--------------------------	1 – 0			FISU	
1 – 0	FISU	 --------------------------->		
	:  break Tx			
	:  restore Tx			
	FISU	 --------------------------->		
	<--------------------------	1 – 0		FISU	
			
TEST DESCRIPTION			
1.	Break the transmission link, and restore before level 2 goes out of service. (Break time is less than approx. 128ms for 64 kbit/s).		
2.	Check that A enters and leaves the octet counting mode on reception of an FISU.		

MTP LEVEL 2

TEST NUMBER:	7.1	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 10.3	STD:	Fig. 9, Fig. 11, Fig. 17			
TITLE:	AERM check			
SUB TITLE:	Error rate below the normal threshold			
PURPOSE:	To test the AERM on error rates below the normal threshold			
PRE–TEST CONDITIONS:	Link out of service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
Link	Link		
	<-------------------------	1 – 0			SIOS	
1 – 0	SIOS	 --------------------------->		
				:	start	
	<--------------------------	1 – 0			SIO	
1 – 0	SIO	 --------------------------->		
	<--------------------------	1 – 0			SIN	
1 – 0	SIN	 --------------------------->				½	
	corrupt LSSUs	 --------------------------->					½  T4	
	 --------------------------->				½	
1 – 0	SIN	<--------------------------	1 – 0			FISU	
			
TEST DESCRIPTION			
1.	Start link at A.		
2.	Generate x number of corrupt LSSUs (e.g. CRC error) at B.(x < Tin).		
3.	Check that the proving period continues and the link aligns successfully.		

MTP LEVEL 2

TEST NUMBER:	7.2	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 10.3	STD:	Fig. 9, Fig. 11, Fig. 17			
TITLE:	AERM check			
SUB TITLE:	Error rate at the normal threshold			
PURPOSE:	To test the AERM at an error rate equal to the normal threshold			
PRE–TEST CONDITIONS:	Link out of service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
	Link		
	<--------------------------	1 – 0		SIOS	
1 – 0	SIOS	 ---------------------------->		
			:	start	
	<--------------------------	1 – 0		SIO	
1 – 0	SIO	 --------------------------->		
	<--------------------------	1 – 0		SIN	
1 – 0	SIN	 --------------------------->		
1 – 0	corrupt LSSUs	 --------------------------->		
	SIN	--------------------------->				½	
					½  T4	
					½	
	<-------------------------- 	1 – 0		FISU	
			
TEST DESCRIPTION			
1.	Start link at A.		
2.	Generate x number of corrupt LSSUs (e.g. CRC error) at B.(x  Tin).		
3.	Check that the proving period is aborted, then restarted and link aligns successfully.		

MTP LEVEL 2

TEST NUMBER:	7.3	PAGE:	1 OF 1		
REFERENCE:	Q.703 § 10.3	STD:	Fig. 9, Fig. 11, Fig. 17			
TITLE:	AERM check			
SUB TITLE:	Error rate above the normal threshold			
PURPOSE:	To test the AERM at an error rate above the threshold over five proving periods			
PRE–TEST CONDITIONS:	Link out of service			
CONFIGURATION:	1	TYPE OF TEST:	VAT		
EXPECTED SIGNAL UNIT SEQUENCE:			
	SP		B		SP		A		
Link	Link		
	<--------------------------	1 – 0			SIOS	
1 – 0	SIOS	 --------------------------->		
				:	start	
	<--------------------------	1 – 0			SIO	
1 – 0	SIO	 --------------------------->		
	<--------------------------	1 – 0			SIN	
1 – 0	SIN	 --------------------------->		
1 – 0	corrupt LSSUs	 --------------------------->		
	<--------------------------	1 – 0			SIN	
1 – 0	SIN	 --------------------------->		
1 – 0	corrupt LSSUs	 --------------------------->		
	<--------------------------	1 – 0			SIN	
1 – 0	SIN	 --------------------------->		
1 – 0	corrupt LSSUs	 --------------------------->		
	<--------------------------	1 – 0			SIN	
1 – 0	SIN	 --------------------------->		
1 – 0	corrupt LSSUs	 --------------------------->		
	<--------------------------	1 – 0			SIN	
1 – 0	SIN	 --------------------------->		
1 – 0	corrupt LSSUs	 --------------------------->		
	<--------------------------	1 – 0			SIOS	
TEST DESCRIPTION			
1.	Start link at A.		
2.	Generate x number of corrupt LSSUs (e.g. CRC error) at B.(x  Tin).		
3.	Observe that 5 proving period attempts are made before link out of service state.