speaker sounds OK but handset has "tunnel" sound

tato386 · ‎06-07-2010

I am running 7965GE phones on a UC520 system. Testing internal calls we ran into an odd problem. A few phones have a

"tunnel" type sound when talking with the handset. The problem is the incoming voice sounds like it is in a tunnel. The

problem phone sounds OK on the far end. Same phone using the speaker phone and incoming sound is fine.

Any ideas?

Thanks,
Diego

David Hailey · ‎06-07-2010

Are these IP to IP calls or what? Are you using a wideband codec such as G.722?

Hailey

Jonathan Schulenberg · ‎06-07-2010

Also what firmware version on the phone?

tato386 · ‎06-12-2010

Finally got around to getting that firmware. Phones are 7965GE and firmware is sccp45.8-3-2s.bin.

Thanks for your help.

Diego

Jonathan Schulenberg · ‎06-12-2010

Try upgrading the firmware to 8.5(3) or 8.5(4). That version has issues; I have heard this complaint from other customers running 8.5(2).

tato386 · ‎06-12-2010

Thanks Jonathan. I'll give it a shot.

Rgds,

Diego

tato386 · ‎06-07-2010

These are IP/SCCP to IP/SCCP phones on our local LAN. Codec is G.711u. Will get firmware tomorrow when I get to the office.

Thanks,