дебаг говорит
User-Agent: LinphoneAndroid/4.3.1 (M6 Note) LinphoneSDK/4.4.2 (tags/4.4.2^0)
Content-Length: 0
<------------->
--- (9 headers 0 lines) ---
> 0x7f96f0005910 -- Strict RTP qualifying stream type: audio
> 0x7f96f0005910 -- Strict RTP switching source address to
176.195.144.142:12742 > 0x7f9710008bb0 -- Strict RTP qualifying stream type: audio
> 0x7f9710008bb0 -- Strict RTP switching source address to
91.193.177.73:62055 > 0x7f9710008bb0 -- Strict RTP learning complete - Locking on source address
91.193.177.73:62055 > 0x7f96f0005910 -- Strict RTP learning complete - Locking on source address
176.195.144.142:12742 -- Channel SIP/office-00000051 left 'simple_bridge' basic-bridge <f4a78d9d-0de2-4225-905f-add0a154bc26>
-- Channel SIP/+79687270018-00000050 left 'simple_bridge' basic-bridge <f4a78d9d-0de2-4225-905f-add0a154bc26>