My client is experiencing initermitent one way audio problems on their brand new 7921G phones.
This happens for both internal as well as PSTN calls. And the one way audio direction is not constant. Sometimes, it is the 7921G can't hear the other side, while other times it is the other side that can't hear the 7921G. And this also happens for internal calls
e.g. when a 7921G call another 7921G, or when a 7921G calls a 7942G.
This CUCM server has only been installed for 1 month and the client suspect that this happens all the way from the beginnning. It's just because the problem is initermittant, they never realized it.
They only have 1 x Publisher in the setup, and the version is 6.1.2.
For the 7921G users, they are mainly mobile users. However, they only walk in the same floor i believe where all the 9 APs are located. All the 9 x new APs are Cisco 1131G. They all connect via a Cisco Wireless Controller 4402. All the APs and the Wireless Controller are on the same local subnet. There are a total of around 70 x 7921G deployed, but only some 7921G have this initermittant problem.
We are having an intermitten audio issue when the caller can not hear when we use 7921. I just read this acticle and mentioned about the transmit power setting.
May I know what is the power levels on all the your APs? Do we have to match the AP power level to the phone power level?
According to this acticle the phone power level is 20mW, how can we find phone setting for the transmit power level?
**Check the access point to see that the transmit power setting matches the transmit power setting on the phone. One-way audio is common when the access point power setting is greater (100mW) than that of the phone (20mW)**
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