Hi guys,
I have a customer with an IP500v2 on R11. They have digital handsets (9504) and SIP Trunks, and for a while now they have been experiencing an echo on some calls. At first we thought it was the SIP at fault, the provider wanted examples, and the customer kept failing to provide enough in a short enough time to be of any use.
Eventually I went to site to try to get some examples myself. The calls worked fine to the majority of destinations, but had the echo when calling another of their sites with exactly the same set up (no SCN). The SIP provider listened back to the call and said they didn't hear an echo.
So I went back to site, sent a colleague to their other site, and made continuous calls back and forth with no issue. My colleague was using an analogue phone in one of their meeting rooms, so I asked him to borrow a digital phone instead, and straight away we got the fault, and on every call.
So it seems that the problem is with calls going from digital to SIP and then back to digital. So the question is why? Is it a faulty digital card, or a faulty VCM? Or is the SIP at fault some how? And which end is the problem likely to be, the one that can hear the echo or the one that can't?
Any help on this would be appreciated, its driving me mad!
Thanks,
Joe
Joe Newton
Avaya ACIS (SME), Avaya ACSS (SME), Mitel MCA, CompTIA A+, Cisco CCNA
I have a customer with an IP500v2 on R11. They have digital handsets (9504) and SIP Trunks, and for a while now they have been experiencing an echo on some calls. At first we thought it was the SIP at fault, the provider wanted examples, and the customer kept failing to provide enough in a short enough time to be of any use.
Eventually I went to site to try to get some examples myself. The calls worked fine to the majority of destinations, but had the echo when calling another of their sites with exactly the same set up (no SCN). The SIP provider listened back to the call and said they didn't hear an echo.
So I went back to site, sent a colleague to their other site, and made continuous calls back and forth with no issue. My colleague was using an analogue phone in one of their meeting rooms, so I asked him to borrow a digital phone instead, and straight away we got the fault, and on every call.
So it seems that the problem is with calls going from digital to SIP and then back to digital. So the question is why? Is it a faulty digital card, or a faulty VCM? Or is the SIP at fault some how? And which end is the problem likely to be, the one that can hear the echo or the one that can't?
Any help on this would be appreciated, its driving me mad!
Thanks,
Joe
Joe Newton
Avaya ACIS (SME), Avaya ACSS (SME), Mitel MCA, CompTIA A+, Cisco CCNA