I have deployed the Cisco Aironet Access-Points, Call Manager 5.0(4) and we have registered a few Cisco 7920 IP Phones.
When calling each other [OnNet call] from 7920 Phones the voice quality is good and we experience no problems.
However when a call is initiated from the 7920 to the PSTN/GSM [OffNet] or vica-versa, i hear a "strange" clicking noise on the 7920 through the duration of the call.This sound start when I talk only and stop when I listen .
I have the lastest firmware running on the Cisco 7920 (4.0-03-01) and the Voice port configuration is :
connection plar opx 5000
caller-id alerting dsp-pre-allocate
Any advice for this problem .