Voice delay on call pickup

[S J]

Hello,

We are running the T46G phones with EXP40 sidecars. These connect back to our Metaswitch. Have had good luck with them until we added the EXP40 sidecar and started to get very slow button responses, button updates not taking place, weird audio issues (codecs) and a few lost calls when transfering.

Adjusting the codecs fixed most call quality but was not perfect. Removing sidecar seem to help.

Only fix was the latest firmware upgrade, T46-28.81.0.70

This firmware fixed everything but has now added a new feature where you pick up an inbound call and there is a 2sec delay. The caller can't hear you nor can you hear them. This does not happen on every call and the call logs (SAS Trace in Metaswitch) does not show anything of note.

Is this a setting that needs to be adjusted or a bug in the new firmware?

Cheers,
Scott Murphy