[Linphone-users] Interop with CSipSimple

[Daniel Gnoutcheff]

I'm having trouble making calls from Linphone to CSipSimple.  When I use
Linphone to place a call, CSipSimple rings, but when I accept the call,
it drops immediately, with CSipSimple saying only "hung up" and Linphone
saying:

  "Incompatible, check codecs or security settings ..."

However, if I make a call in the reverse direction (i.e. if I call from
CSipSimple to Linphone), it works perfectly.  (Call accepted, functional
audio in both directions.)

Debug window logs (for both directions) attached.  (This Linphone
registers as <sip:address@hidden>, CSipSimple as
<sip:address@hidden>).

Interesting bit from the failed call log:

> message: 2016-05-21 23:47:10:803 Op [0x164ce90] receiving call response 
> [200], dialog is [0x147c300] in state [BELLE_SIP_DIALOG_CONFIRMED]
> message: 2016-05-21 23:47:10:803 [Early exit] reason [Unexpected token] at 
> line[14] position[17]
> message: 2016-05-21 23:47:10:803 [Early exit] reason [Unexpected token] at 
> line[14] position[17]
> message: 2016-05-21 23:47:10:803 [Early exit] reason [Unexpected token] at 
> line[14] position[17]
> error: 2016-05-21 23:47:10:804 session_description parser error for [v=0

> o=- 3672877625 3672877627 IN IP4 66.151.32.200

> s=pjmedia

> c=IN IP4 66.151.32.200

> t=0 0

> m=audio 61280 RTP/AVP 3 103

> c=IN IP4 66.151.32.200

> a=rtcp:61281

> a=sendrecv

> a=rtpmap:3 GSM/8000

> a=zrtp-hash:1.10 
> 38478ad9e7310f2f9c5fb16c93f8ea739ef1b1bd0da101be87fb74ddfc397535

> a=rtpmap:103 telephone-event/8000

> a=fmtp:103 0-16

> m=video 0 RTP/AVP

> c=IN IP4 66.151.32.200

> a=nortpproxy:yes

> ]
> error: 2016-05-21 23:47:10:804 Failed to parse SDP message.

What's going wrong here, and what do I do about it?

linphone 3.9.1
belle-sip 1.4.2
bzrtp 1.0.3
mediastreamer 2.12.1
ortp 0.25.0
libsrtp 1.5.4
everything else from Debian 8 (jessie)

to-csip.log
Description: Text Data

signature.asc
Description: OpenPGP digital signature