So I am running (admittedly legacy) Incredible PBX 188.8.131.52 in production. Same-old, same-old setup for at least 3 years now. I have one user who reports when she first picks up most internal/external callers there is poor audio just initially. Nothing terrible, but annoying to her. The MOS figures look good, I’ve replaced her phone, I’ve replaced her cabling, I’ve patched her into a different PoE switch port, I’ve verified no UDP traffic congestion around her call times, etc. All to no avail.
I know I should grab some SIP trace logging, and I intend to do that this week. Looking at some CDR reports from her recent past calls I see something odd. Each incoming call that she takes shows the Answer event along with a coinciding No Answer event. Don’t recall seeing this happen before. I’ve verified that her desk phone is the only one SIP-registered as x835, and I’ve verified that her desk phone only has a single instance of the x835 SIP account configured on it. And I’ve verified she doesn’t have any Follow Me or Forwarding defined.
Anyone seen similar things?