TN767 DS1 Error Code

techma · August 20th, 2007, 07:18 PM

I replaced a TN767E and when I did the other one that I put in came up with test 114 failing with error code 2 then 3 then 4. I can't find it in the maintenance manual on avaya's site. I replaced the CSU and it still has issues. I believe it is the service rovider but I can't explain it to them without knowing what's wrong. Anybody know?

martinyoung · August 21st, 2007, 09:14 AM

The only instance I can find for test 114 is for aux trunks and it does not give single digit error codes. Do a long test on the board, this will test the board's internal identification (tests 50 and 52). You might have a bad DS1 board.

techma · August 21st, 2007, 11:36 AM

I apologize it's actually test 144 that fails and comes up with the errors. It's dropping calls and I have replaced the TN767E and CSU 3 different times now.

martinyoung · August 21st, 2007, 11:52 AM

Test 144 is a counter for slips. Whenever you test the DS1 board this will indicate the number of slips that have happened since the last time the board was tested. It should pass with no errors the second time you test it. If it is still failing, your T1 is slipping and that is why you are dropping calls.

It could be a CO problem, but before calling them type "display sync". What is your primary sync source? It needs to be a T1 and not internal clocking. To verify that your PBX is clocking correctly, type "status sync". The answer should be the T1 you saw when you displayed sync. If it shows the sync to be 1A, type "disable sync" then "enable sync". Wait a few seconds and status sync again. If it is the T1, run your test twice on the new DS1 card, if you are still slipping, now call the vendor and tell them the T1 is slipping.

oozenoz · August 22nd, 2007, 09:48 AM

You may also want to check to see if clock source is something that can be set on the CSU (not all CSUs are straight pass-thru). Even if the PBX is using external clocking off the T1, if your CSU is configured to use internal clocking or the PBX transmit rather than the telco side of the T1 for its clock, you can end up slipping.

martinyoung · August 22nd, 2007, 09:54 AM

Good point. What kind of CSU do you have? If it is the white 120 CSU that plugs into the carrier behind the DS1, it has no internal clocking option. If it is an external CSU, it might have a clocking option.

August 20th, 2007, 07:18 PM	#1 (permalink)
techma PBXtech SILVER 25+ posts Join Date: Jul 2007 Posts: 88	TN767 DS1 Error Code I replaced a TN767E and when I did the other one that I put in came up with test 114 failing with error code 2 then 3 then 4. I can't find it in the maintenance manual on avaya's site. I replaced the CSU and it still has issues. I believe it is the service rovider but I can't explain it to them without knowing what's wrong. Anybody know?

August 21st, 2007, 09:14 AM	#2 (permalink)
martinyoung Moderator Join Date: Dec 2005 Posts: 1,402	Re: TN767 DS1 Error Code The only instance I can find for test 114 is for aux trunks and it does not give single digit error codes. Do a long test on the board, this will test the board's internal identification (tests 50 and 52). You might have a bad DS1 board. __________________ Marty Retired Avaya DSIC tech

August 21st, 2007, 11:36 AM	#3 (permalink)
techma PBXtech SILVER 25+ posts Join Date: Jul 2007 Posts: 88	Re: TN767 DS1 Error Code I apologize it's actually test 144 that fails and comes up with the errors. It's dropping calls and I have replaced the TN767E and CSU 3 different times now.

August 21st, 2007, 11:52 AM	#4 (permalink)
martinyoung Moderator Join Date: Dec 2005 Posts: 1,402	Re: TN767 DS1 Error Code Test 144 is a counter for slips. Whenever you test the DS1 board this will indicate the number of slips that have happened since the last time the board was tested. It should pass with no errors the second time you test it. If it is still failing, your T1 is slipping and that is why you are dropping calls. It could be a CO problem, but before calling them type "display sync". What is your primary sync source? It needs to be a T1 and not internal clocking. To verify that your PBX is clocking correctly, type "status sync". The answer should be the T1 you saw when you displayed sync. If it shows the sync to be 1A, type "disable sync" then "enable sync". Wait a few seconds and status sync again. If it is the T1, run your test twice on the new DS1 card, if you are still slipping, now call the vendor and tell them the T1 is slipping. __________________ Marty Retired Avaya DSIC tech

August 22nd, 2007, 09:48 AM	#5 (permalink)
oozenoz PBXtech PLATINUM 300+ posts Join Date: Feb 2006 Posts: 350	Re: TN767 DS1 Error Code You may also want to check to see if clock source is something that can be set on the CSU (not all CSUs are straight pass-thru). Even if the PBX is using external clocking off the T1, if your CSU is configured to use internal clocking or the PBX transmit rather than the telco side of the T1 for its clock, you can end up slipping. __________________ - calvin

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August 22nd, 2007, 09:54 AM	#6 (permalink)
martinyoung Moderator Join Date: Dec 2005 Posts: 1,402	Re: TN767 DS1 Error Code Good point. What kind of CSU do you have? If it is the white 120 CSU that plugs into the carrier behind the DS1, it has no internal clocking option. If it is an external CSU, it might have a clocking option. __________________ Marty Retired Avaya DSIC tech

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