Outbound - no reply to our critical packet - freezed phone

@KK89 wrote:

Hi everyone,

I found no similar issue in the forum, so I create a New Topic.

My System:
Asterisk Version: 11.17
FreePBX 2.11.0.43
Phones: SNOM 320 (8.7.3.25)
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?

Thanks

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