8941 Conference call one way audio

[Richard Imus]

Hello,

I just want to share a weird issue that i'm facing with 8941 phone, and at the same time get some feedback.

I've deployed Call Manager Express (10.0) with a mix of 7841 and 8941 configured as SIP.

My issue happens when making conference calls. Please see below:

7841(initiator) ------8941(2nd party)--------7841(3rd party)--------7841(4rth party)

Problem: 8941 can hear everybody, but everybody can't hear 8941 (one way audio).

8941(initiator)------7841(2nd party)--------7841(3rd party)--------7841(4rth party)

No problem. Everyone can hear everyone.

7841(initiator)------7841(2nd party)--------8941(3rd party)--------7841(4rth party)

No problem. Everyone can hear everyone.

There is one way audio only if the 8941 is the 2nd party in the conference.

I'm guessing this is a bug, however i can't find any documentation about this. Have anyone experience maybe similar to this? I have to at least give something to my customer.

Thank you.

[Charles Hill]

First thing comes to mind is a bug, however I don't see a Bug related to your symptoms.

I would upgrade the firmware, if not at the latest. 

Possible codec negotiation issue:

If the 7841 phones are advertising G722 codec, I would disable G722 on a couple of phones to test.

Make test call and if test ok, you'll know its a codec issue.

Hope this helps,

Please rate helpful posts.

Thanks.