Using a CCM 5.1 architecture with 7961 IP Phone, some calls to PSTN randomly fails after being established. That means that the call is established, the 2 parties speak and all of a sudden, the call is ended. My client is using a 2800 gateway with a partial T2 Telco Line (26 channels). What else but the Telco Provider Quality would end calls like this ? This happens quite rarely but is annoying.
Does anyone have an idea ?
Thanks for your help,