Use this procedure to verify if the media module operates correctly and has sufficient media module audio resources.
Take an IP telephone off-hook.
Execute the status stationext# command.
Scroll to the CALL CONTROL SIGNALLING section.
In the AUDIO CHANNEL section if the Switch Port field contains a port location then there is a media module port that is dynamically allocated to the IP telephone call.
If the AUDIO CHANNEL section on the status station form is blank, this might be due to an inability of the media module to allocate resource for the call.