Hmm, I'm not too strong on the wireless side of things, but my guess would be that wireless is where the problem lies. On wired phones (as I'm sure you are aware) 1-way audio is normally a codec issue, and is usually pretty limited in how it behaves (always happens on certain types of calls).
Here are a few things to doublecheck as far as how the phone is configured:
- AP data rates: 1, 2 = disabled, 5.5 = enabled(or disabled), 6, 9 = disabled, 11 =
required, 12 and above = enabled
- AP transmitter power settings should NOT be set at max or 100mw. A site survey IS required for proper 7920 phone deployment. The requirements for voice clients are more stringent than for wireless data clients. Also, the 7920 phone default power setting is 20mw. This should match the client power setting / value configured on the AP.
- AP radio ARP caching should be enabled.
- AP channel setting should be set for either 1, 6,or 11...all other channels overlap, and
can cause noise problems.
- QBSS should be enabled on the AP to allow for load-balancing when roaming. This is a
QOS element configuration.
Also under the QOS parameters, the AVVID priority mapping should be enabled.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.