I've got 7941's here with encryption turned on. It seems working fine, on calls between these phones, the Lock-symbol is shown, on calls with the PSTN or not-encrypting phones it's not.
When I start an ad-hoc conference, all encrypting participants have no audio. The non-encrypting participants can hear each other. The call statictics on a 7941 show 0 recvr packets, but wireshark says that udp-packets flow in both directions.
The conference bridge is unsecure.
From my understanding, the encrypting phones should fall back to "unsecure mode" when an unsecure cfb is available only. Am I wrong here?
The CCM Version is 18.104.22.1680-1
7941 FW version is SCCP41.8-3-4SR1S
Thanks in advance