TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.2.2	
REFERENCE:	Q.724 § 1.8	
TITLE:	CGC	
SUBTITLE:	CGC sent	
PURPOSE:	To verify that SP A is able to generate a circuit group congestion signal	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that a circuit group congestion signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
CGC	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
			
TEST DESCRIPTION			
1.	Attempt to make a call from SP B to SP A.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – An address complete signal (without subscriber free) may be sent in the backward direction before a CGC signal is sent.	
	Note 2 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.3.1	
REFERENCE:	Q. 724 § 1.8	
TITLE:	NNC	
SUBTITLE:	NNC received	
PURPOSE:	To verify that the call will be immediately released by the outgoing signalling point if a national network congestion signal is received and the correct indication is given to the calling party	
PRE–TEST CONDITIONS:	Arrange the data in SP B such that a national network congestion signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	AT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	NNC	
CLF	 ------------------------->		
	<-------------------------	RLG	
			
TEST DESCRIPTION			
1.	Attempt to make a call from SP A to SP B.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – An address complete signal (without subscriber free) may be sent in the backward direction before a NNC signal is sent.	
	Note 2 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.3.2	
REFERENCE:	Q.724 § 1.8	
TITLE:	NNC	
SUBTITLE:	NNC sent	
PURPOSE:	To verify that SP A is able to generate a national network congestion signal	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that a national network congestion signal is returned to the call request, where SP A is now an I/C exchange	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
NNC	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
			
TEST DESCRIPTION			
1.	Attempt to make a call from SP B to SP A.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – An address complete signal (without subscriber free) may be sent in the backward direction before a NNC signal is sent.	
	Note 2 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.4.1	
REFERENCE:	Q.724 § 1.7	
TITLE:	ADI	
SUBTITLE:	ADI received	
PURPOSE:	To verify that on receipt of an address incomplete message the call is immediately released and the correct indication given to the calling party	
PRE–TEST CONDITIONS:	Signalling point B should be able to determine that the proper number of digits has not been received	
CONFIGURATION:	1	TYPE OF TEST:	VAT and CPT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	ADI	
CLF	 ------------------------->		
	<-------------------------	RLG	
			
TEST DESCRIPTION			
1.	Make a call from SP A to SP B, but do not enter the final digit.
Record the message sequence using a signal monitor.	
2.	CHECK A:	WAS THE CORRECT TONE OR ANNOUNCEMENT SENT TO THE CALLING SUBSCRIBER? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.4.2	
REFERENCE:	Q.724 § 1.7	
TITLE:	ADI	
SUBTITLE:	ADI sent	
PURPOSE:	To verify that signalling point A is able to generate an address incomplete signal	
PRE–TEST CONDITIONS:	SP A should be able to determine that the proper number of digits has not been received	
CONFIGURATION:	1	TYPE OF TEST:	VAT and CPT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
ADI	 ------------------------->		
	<-------------------------	DLF	
RLG	 ------------------------->		
			
TEST DESCRIPTION			
1.	Make a call from SP B to SP A, but do not enter the final digit.
Record the message sequence using a signal monitor.	
2.	CHECK A:	WAS THE CORRECT TONE OR ANNOUNCEMENT SENT TO THE CALLING SUBSCRIBER? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.5.1	
REFERENCE:	Q.724 § 6.3	
TITLE:	CFL	
SUBTITLE:	CFL received	
PURPOSE:	To verify that the call will be immediately released by the outgoing signalling point if a call failure signal is received and the correct indication is given to the calling party	
PRE–TEST CONDITIONS:	Arrange the data in signalling point B such that a call failure signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	CFL	
CLF	 ------------------------->		
	<-------------------------	RLG	
			
TEST DESCRIPTION			
1.	Attempt to make a call from SP A to SP B.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CALL IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – An address complete signal may be sent in the backward direction before a CFL signal is sent.	
		
	Note 2 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.5.2	
REFERENCE:	Q.724 § 6.3	
TITLE:	CFL	
SUBTITLE:	CFL sent	
PURPOSE:	To verify that signalling point A is able to generate a call failure signal	
PRE–TEST CONDITIONS:	Arrange the data in SP A such that a call failure signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
CFL	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
			
TEST DESCRIPTION			
1.	Attempt to make a call from SP B to SP A.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CALL IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – An address complete signal may be sent in the backward direction before a CFL signal is sent.	
		
	Note 2 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.6.1	
REFERENCE:	Q.724 § 1.9	
TITLE:	SSB	
SUBTITLE:	SSB Received	
PURPOSE:	To verify that the call will be immediately released by SP A if a Subscriber–busy signal is received and the correct indication is given to the calling party	
PRE–TEST CONDITIONS:	Called termination must be busy	
CONFIGURATION:	1	TYPE OF TEST:	VAT and CPT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	SSB	
CLF	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP A to SP B.
Record the message sequence with a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	
		
	Note 2 – This sequence may not be possible at International Gateways.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.6.2	
REFERENCE:	Q.724 § 1.9	
TITLE:	SSB	
SUBTITLE:	SSB Sent	
PURPOSE:	To verify that signalling point A is able to generate or retransmit a subscriber busy signal	
PRE–TEST CONDITIONS:	The called termination must be busy	
CONFIGURATION:	1	TYPE OF TEST:	VAT and CPT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
SSB	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP B to SP A.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	
		
	Note 2 – This sequence may not be possible at International Gateways.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.7.1	
REFERENCE:	Q.724	
TITLE:	UNN	
SUBTITLE:	UNN Received	
PURPOSE:	To verify that the call will be immediately released by SP A if an Unallocated–number signal is received and the correct indication is given to the calling party	
PRE–TEST CONDITIONS:	Arrange the data in signalling point B such that a UNN Signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT and CPT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	UNN	
CLF	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP A to SP B.
Record the message sequence with a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	
		
	Note 2 – This sequence may not be possible at International Gateways.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.7.2	
REFERENCE:	Q.724	
TITLE:	UNN	
SUBTITLE:	UNN Sent	
PURPOSE:	To verify that signalling point A is able to generate an Unallocated–number signal	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that a UNN Signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT and CPT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
UNN	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP B to SP A.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	
		
	Note 2 – This sequence may not be possible at International Gateways.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.8.1	
REFERENCE:	Q.724	
TITLE:	LOS	
SUBTITLE:	LOS Received	
PURPOSE:	Verify that the call will be immediately released by SP A if a Line out of service signal is received and the correct indication is given to the calling party	
PRE–TEST CONDITIONS:	Arrange the data in signalling point B such that a LOS Signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	LOS	
CLF	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP A to SP B.
Record the message sequence with a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.8.2	
REFERENCE:	Q.724	
TITLE:	LOS	
SUBTITLE:	LOS Sent	
PURPOSE:	To verify that signalling point A is able to retransmit a Line–out–of–service signal	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that a LOS Signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
LOS	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP B to SP A.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note 1 – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	
		
	Note 2 – This sequence may not be possible at International Gateways.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.9.1	
REFERENCE:	Q.724	
TITLE:	SST	
SUBTITLE:	SST received	
PURPOSE:	To verify that a call will be immediately released by the outgoing signalling point if a send–special–information–tone signal is received and the correct indication is given to the calling party	
PRE–TEST CONDITIONS:	Arrange the data in signalling point B such that a SST signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	SST	
CLF	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP A to SP B
Record the message sequence with a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.9.2	
REFERENCE:	Q.724	
TITLE:	SST	
SUBTITLE:	SST sent	
PURPOSE:	To verify that signalling point A is able to generate a send–special–information–tone signal	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that a SST signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
SST	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP B to SP A
Record the message sequence with a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.10.1	
REFERENCE:	Q.724 § 10.2	
TITLE:	ACB	
SUBTITLE:	ACB received	
PURPOSE:	To verify that because of incompatible CUG information the call is rejected and an access barred signal is returned to the call request	
PRE–TEST CONDITIONS:	Arrange the signalling point data such that the CUG information contained in the IAI is compatible with the information stored at SP B	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAI	 ------------------------->		
	<-------------------------	ACB	
CLF	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Make a CUG call from SP A to SP B.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.10.2	
REFERENCE:	Q.724 § 10.2	
TITLE:	ACB	
SUBTITLE:	ACB sent	
PURPOSE:	To verify that SP A is able to generate or receive an access barred signal	
PRE–TEST CONDITIONS:	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAI	
ACB	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Make a CUG call from SP B to SP A.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE APPROPRIATE TONE OR ANNOUNCEMENT RETURNED TO THE CALLING PARTY? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.11.1	
REFERENCE:	Q.724 § 10.7	
TITLE:	DPN	
SUBTITLE:	DPN received	
PURPOSE:	To verify that the call will be immediately released by the SP A if a digital path not provided signal is received and the correct indicator is given to the calling party	
PRE–TEST CONDITIONS:	
a)	Ensure the IAM is set to indicate that an all digital path is required.	
b)	Ensure the data in signalling point B is configured such that a digital path not provided signal is returned to the call request.	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	DPN	
CLF	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP A to SP B.
Ensuring that the IAM is set to indicate that an all digital path is required. Record the message sequence using a signal monitor.	
2.	CHECK A:	IS THE CIRCUIT IDLE? . . . . . .	
3.	CHECK B:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	4.11.2	
REFERENCE:	Q.724 § 10.7	
TITLE:	DPN	
SUBTITLE:	DPN sent	
PURPOSE:	To verify that signalling point A is able to generate a digital path not provided signal	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that a DPN signal is returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
DPN	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP B to SP A.
Record the message sequence with a signal monitor.	
2.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
3.	CHECK C:	WAS THE MESSAGE SEQUENCE AS SHOWN ABOVE? . . . . . .	
		
	Note – It may not be possible to confirm that the appropriate tone is returned to the calling party. In this case it must be verified that the signalling point under test retransmits the signal received.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	5.1	
REFERENCE:	Q.724 § 6.2.1	
TITLE:	Inability to release in response to a CLF	
SUBTITLE:	
PURPOSE:	To verify that if the signalling point is unable to return a circuit to the idle condition in response to a clear forward signal, the circuit will be blocked	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that it is unable to return the circuit to the idle condition in response to a clear forward signal	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
ACM	 ------------------------->		
Ringing tone	–––––––––––––		
ANC	 ------------------------->		
Speech	 –––––––––––––	Speech	
	<-------------------------	CLF	
BLO	 ------------------------->		
	<-------------------------	BLA	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Make a call from SP A to SP B.
Record the message sequence using a signal monitor.	
2.	CHECK A:	IS RINGING TONE HEARD? . . . . . .	
3.	The called party should answer the call	
4.	CHECK B:	IS SPEECH POSSIBLE? . . . . . .	
5.	The calling party should release the call.	
6.	CHECK C:	VERIFY THAT A CALL CAN NOT BE ORIGINATED FROM EITHER SP	
7.	CHECK D:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
8.	Repeat this test in the reverse direction.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	5.2	
REFERENCE:	Q.724 § 6.2.2	
TITLE:	Inability to release in response to a backward signal	
SUBTITLE:	
PURPOSE:	To verify that if signalling point is unable to return the circuit to an idle condition in response to a backward signal, the circuit will be blocked	
PRE–TEST CONDITIONS:	Arrange the data in signalling point A such that it is unable to return the circuit to an idle condition in response to a backward signal	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM	 ------------------------->		
	<-------------------------	ADI	
BLO	 ------------------------->		
	<-------------------------	BLA	
CLF	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Make a call from SP A to SP B, but do not enter the final digit.	
2.	CHECK A:	VERIFY THAT A CALL CAN NOT BE ORIGINATED FROM EITHER EXCHANGE	
3.	CHECK B:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	
4.	Repeat this test in the reverse direction.	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	5.3.1	
REFERENCE:	Q.724 § 6.4.3a	
TITLE:	Timers	
SUBTITLE:	T2	
PURPOSE:	To check the value of timer T2	
PRE–TEST CONDITIONS:	Arrange the data in signalling point B such that an address complete message is not returned to the call request	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
IAM		–	 ------------------------->		
		½			
	T2	½	T2  | 20–30 seconds			
	½			
CLF	–	 ------------------------->		
	<-------------------------	RLG	
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP A to SP B.
Record the message sequence with a signal monitor.	
2.	CHECK A:	WAS THE CLEAR FORWARD SIGNAL SENT BEFORE 20–30 SECONDS? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .	

TUP LEVEL 4 TEST SPECIFICATION
TEST NUMBER:	5.3.2	
REFERENCE:	Q.724 § 6.4.3b	
TITLE:	Timers	
SUBTITLE:	T3	
PURPOSE:	To check the value of timer T3	
PRE–TEST CONDITIONS:	
a)	Signalling point A should be able to determine that the proper number of digits have not been received.	
b)	Arrange the data in signalling point B such that a clear forward signal is not returned in response to an address incomplete message.	
CONFIGURATION:	1	TYPE OF TEST:	VAT	TYPE OF SP:	SP	
EXPECTED MESSAGE SEQUENCE:	
SP	A		SP	B	
	<-------------------------	IAM	
ADI		–	 ------------------------->		
		½			
	T3	½	4–15 seconds			
	½			
CFL	–	 ------------------------->		
	<-------------------------	CLF	
RLG	 ------------------------->		
	
TEST DESCRIPTION	
1.	Attempt to make a call from SP B to SP A but do not dial the last digit.
Record the message sequence using a signal monitor.	
2.	CHECK A:	WAS A CALL FAILURE SIGNAL SENT BETWEEN 4–15 SECONDS AFTER SENDING OF THE ADDRESS INCOMPLETE MESSAGE? . . . . . .	
3.	CHECK B:	IS THE CIRCUIT IDLE? . . . . . .	
4.	CHECK C:	WAS THE MESSAGE SEQUENCE AS ABOVE? . . . . . .