No audio on remote extension

[Doug]

I've programmed a Yealink T22 IP phone as a "remote" extension.
When making/receiving calls, the call connects but there is no audio.
The Quadro is behind a customer provided router. All phones on site where the Quadro is located work fine.

[tsim]

Hi Doug, if it helps, in Remote Settings for that extension:

1. check/turn on: Enable RTP Proxy
2. check/turn on: Symmetric RTP

Also in the Advanced Setting for the T22, have the "RPort" Enabled.

In my early setups for Remotes, this was a missed item. Obviously there are other related items in this issue, e.g. router settings, etc as in the Forum history but try this if this has not been set.
best regards/sim