I have read some past comments about audio problems with the Yealink phones. We have a site complaining of one way audio and fading in and out during calls and i wondered if anyone has any more experience with this. The handsets have G729a and G711a as their preferred Codec's (in that order) and the Account for each phone is set up the same way (G729a first then G711a). Likewise with the codecs on the SIP Trunks which also have "Lock Codec During Call" set to "NO".
The Yealinks have the latest June 2010 firmware on them.
Appreciate any advice on this as it is an urgent problem.