One of our customers is running IPO500V2 R9.0.5 with Essential Edition and VM Pro, 2 Combo cards with 6 incoming analog lines from Comcast Business Class (Arris EMTA-not sure what model) and 8 digital phones. They have been reporting intermittent problems with called parties not being able to hear them, and DTMF tones not registering on the other end. I believe it to be a Comcast issue, but they are of course telling me that both onsite and remote testing and review of logs indicate that everything is working properly on their end.
They have just replaced the EMTA, and I'm waiting to hear if that resolved the issue. On my end, I have already rebalanced the impedance on the lines, and double-checked the cables running from the EMTA to the analog jacks on the IPO (IPO RJ45 connector with ring on pin 4, and tip on pin 5 - other end is RJ11 with ring on 3 and tip on 4).
To me, it seems like a carrier issue. Is there anything else that I should consider, or IPO settings that I can change, that might help to resolve this problem?
They have just replaced the EMTA, and I'm waiting to hear if that resolved the issue. On my end, I have already rebalanced the impedance on the lines, and double-checked the cables running from the EMTA to the analog jacks on the IPO (IPO RJ45 connector with ring on pin 4, and tip on pin 5 - other end is RJ11 with ring on 3 and tip on 4).
To me, it seems like a carrier issue. Is there anything else that I should consider, or IPO settings that I can change, that might help to resolve this problem?