A customer reports occasional strange timing problems. For example, the receptionist dials Pres, he picks up phone, she says hello. (he hears her voice across hallway but not on phone) Then he hears a ring, then her hello through the phone system. Apparently it can also happen to calls transferred from outside though their reporting is fuzzy in this area.
By the time they call me they need it working again urgently, so I remotely restart the system and phones and everything works fine again. Until the problem strikes again a day or two weeks later.
I have not been able to duplicate the problem and I’m not sure where to start looking. The system worked for two years without any reports like this. The problem seems to have begun some weeks after I brought it up to 2.8 in stages from 2.3. Current version is 220.127.116.11. Asterisk is 1.4.22 on CentOS 5. The POTS connection is via a Sangoma card. There are a total of 13 Snom phones. I’ve looked at system load before restarting and found it very low with minimal call traffic.