One way audio with Yealink IP Phones in BYOC

[Rizwan_Ullah]

Hi

We face a one-way audio issue with Yealink T-31P IP Phones and Ribbon SBC 1000. The same phone works perfectly with the Ribbon SBC Swe Edge. What I suspect is the Opus codec priority since there is no option of adding the OPUS code in SBC 1000 but is available in SBC SWE Edge.

The strange thing is that this issue is never seen in inbound calls from PSTN to Zoom, but it happens every time a Zoom user calls a PSTN number. We don't face any such issue when the Zoom app (Windows, Mobile) is used for inbound and outbound calls. 

We have tried to make changes to the provisioning template for IP phones, but it doesn't affect anything and nothing changes. 

Has anyone faced any such issue? I need help.


Rizwan