Brand new install but have an echo issue

[d00ner62]

So I have replaced some Samsung 3 line sets with a CICS and 7 t7316e sets. Now the customer and I noticed that talking on any analog line causes an echo. You can hear your self talking through the phone. I replaced the CICS and the line cards but this fixed nothing. Is it a bad batch of t7316e's? I don't get the echo on intrernal calls but I get it on all 4 of the analog lines. Thes lines are standard analog lines, there is now VoIP or digital conversions over the line. Changing the line settings to shortCO or longCO has changed nothing. I can't find the problem. Could it be a grounding issue? I'm at a loss

 

[SYQUEST]

Is there any way to verify what codec is being used in the T7316E sets? Could the codec cause the excessive sidetone on the CICS? How can you tell if the T7316E set is manufactured by Avaya and not NT?

....JIM....

 

[curlycord]

Branding
Clearly says Avaya on them.

Issues with head set port as well.






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