I’m having issues with dropped calls where the calls could be new, waiting in the queue to calls that have been going on for several minutes. So far it looks like in each case I get an ACK request, followed by a BYE and then a 481 Call let/transaction does not exist. This appears to be the sequence of events, and it is happening intermittently, but often happens in groups of several drop calls right together.
The BYE shows “HangupCause: Requested channel not available” and the “HangupCauseCode: 44” is given.
System is 10.13.66-11 with Asterisk 13.8.2 loaded from Distro. I’m using Grandstream GXP-2160 phones SIP trunks.
Has anyone else encounter this same or similar issue?