Hey all,

I've recently updated an Asterisk installation to 11.10.2 (from the Gentoo packaged build), and the update has (seemingly) broken TLS transport for snom phones (I could reproduce on snom 3x0 and 7x0 with 8.4.3x and 8.7.x.y firmwares). What happens is that the registration to the PBX is successful, and inbound calls work normally (i.e., when the phone is being signalled that a call is coming in), but dispatching a call from the snom phone to the PBX makes the TLS transport "hang" (i.e., the PBX doesn't see any more TLS packets from the phone, and OPTIONS is no longer replied to). The phone then kills the TLS channel after a while (probably times it out) and Asterisk marks the phone as unreachable due to QUALIFY, and after some time (roundabout two minutes) the phone reconnects the TLS channel and is reachable again. I couldn't reproduce this behaviour with other phones (i.e., Gigaset devices which I also use with TLS transport).

Is this a known regression, and generally: how can I help diagnose this problem further for opening a bug-report, besides the description given above? Has anyone else encountered this and found another workaround besides switching to TCP/UDP-transport for the phones?

Thanks for any hints in advance!

--
--- Heiko Wundram.

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