I am trying to diagnose and resolve a problem with calls in progress to my office getting dropped.
We are running Asterisk 220.127.116.11, with FreePBX 2.9.0, a SIP trunk, and the licensed G.729 (I think that’s the one?) codec installed to help trim down bandwidth.
The problems that we’ve run into is either where people calling in stop hearing the office side, but the office workers can still hear the inbound callers just fine before it drops. Then there’s the occasional ‘all lines are busy’ errors when trying to dial out for anybody in the office.
I’ve been doing Linux administration for over a decade now but I’m still a beginner at VOIP and associated technologies (that usually has a whole department of its own), but this is in my lap and the disruption to work is really hurting the office workflow.
What can I look for to determine whether the problem is the VOIP box, the internet provider (by way of poor connection), or bandwidth needs? What key words can I start digging through the logs with in order to FIND the dropped calls and start getting meaningful diagnostic information from them?