8821 Wireless Phone - No Audio With Internal Calls Only

[Quintin.Mayo]

Hi,

We just purchase four 8821 wireless units we found there is audio on external calls but no audio on internal calls.  I checked the region codec setting and they are set for 722,711.  Can anyone provide any guidance for troubleshooting this behavior, I updated the firmware 11-0-6SR4 but no avail.

Thanks,

[Nithin Eluvathingal]

Its not the Codec, check the network rechability from 8821 to the desk phone network vice versa.

95% chance its network issue.

2.12.0.0

[Roger Kallberg]

This article might be helpful for you. https://community.cisco.com/t5/collaboration-knowledge-base/how-to-troubleshoot-one-way-no-audio-issues/ta-p/3164442/jump-to/first-unread-message