I found no similar issue in the forum, so I create a New Topic.
Asterisk Version: 11.17
Phones: SNOM 320 (220.127.116.11)
the Phoneserver and the Phones are on the same Network
Phones are “Direct” Connected to a Cisco PoE Switch
since last week (no changes on the Firewall and no changes on the Asterisk Server) sometimes when Our Employees do a outbound Call some of the Snom 320 freezes and at the same time I see the following Message in the FreePBX log:
chan_sip.c: Hanging up call xxxxxxxx - no reply to our critical packet
after some minutes the Phone is back or it restarts.
It concerns no special Phones or places (as I currently know) and it is always another phone.
Can anyone help?