I'm working on a G3r running CM1.3 software. We have an ISDN PRI trunk group with 238 channels and 2 D-channels. This trunk group was put into service in 2001 and has worked just fine since. It is programmed for descending on outgoing calls and AT&T sends incoming in ascending.
Last week we started getting some complaints from some users having trouble getting an outside line.
After much testing we have found that there are a number of outgoing calls going out on the first 23 channels of the trunk group. We have been able to duplicate the problem on several VoIP phones and I have seen an outbound call from one of the VoIP tie trunks on one of the upper channels. The testing also showed outbound calls from the same VoIP phone going out one of the button channels as well. We have even had a small group of 84XX phones that have recently complained about the same issue on Friday. They will get a fast busy and after several attempts the call will go out.
I've done list trace on a number of the phones where the complaints came and get a denial event 1195 which indicates glare whenever the test calls receive a fast busy. The next test might go through but usually on a bottom channel.
What is even stranger is that the first 23 channels are the only upper channels taking outbound calls. All on the same circuit board - the 24th channel is a D-channel None of the other upper channels show outbound calls.
The users that had the have the same COR that they have had for years. Those CORs are used extensively throughout our system of almost 6000 phones but we have only received about 10 complaints all Thursday and Friday of last week. There have not been any changes to route patterns, ARS or the trunk programming. I have seen traffic on all but the 10 middle channels as recently as 04/22/08.
Avaya has verified the trunk group programming to be correct and there are no errors in the logs. AT&T has checked their end and verified that all channels are working on their end.
Has anyone experienced a similar situation?
Last week we started getting some complaints from some users having trouble getting an outside line.
After much testing we have found that there are a number of outgoing calls going out on the first 23 channels of the trunk group. We have been able to duplicate the problem on several VoIP phones and I have seen an outbound call from one of the VoIP tie trunks on one of the upper channels. The testing also showed outbound calls from the same VoIP phone going out one of the button channels as well. We have even had a small group of 84XX phones that have recently complained about the same issue on Friday. They will get a fast busy and after several attempts the call will go out.
I've done list trace on a number of the phones where the complaints came and get a denial event 1195 which indicates glare whenever the test calls receive a fast busy. The next test might go through but usually on a bottom channel.
What is even stranger is that the first 23 channels are the only upper channels taking outbound calls. All on the same circuit board - the 24th channel is a D-channel None of the other upper channels show outbound calls.
The users that had the have the same COR that they have had for years. Those CORs are used extensively throughout our system of almost 6000 phones but we have only received about 10 complaints all Thursday and Friday of last week. There have not been any changes to route patterns, ARS or the trunk programming. I have seen traffic on all but the 10 middle channels as recently as 04/22/08.
Avaya has verified the trunk group programming to be correct and there are no errors in the logs. AT&T has checked their end and verified that all channels are working on their end.
Has anyone experienced a similar situation?