INCOMPATIBLE SDP

lperezu · Post by **lperezu** » Wed Jan 21, 2015 8:37 am

1. Brekeke Product Name and Version: 3.4.2.1/392

2. Java version: 1.7.0_25

3. OS type and the version: Linux 2.6.32-131.0.15.el6.x86_64

4. UA (phone), gateway or other hardware/software involved: (JsSip (WS) and VoiP Nano (UDP)

5. Your problem:

I´m Testing Brekeke SIP Server with WS Support with JsSIP.

Calls through websocket (WS-WS) progressing with no problems but when the call is from JsSIP to VoIP Nano (WS - UPD) The result is INCOMPATIBLE SDP.

¿Any Idea with this problema? ¿Should I enable any rule in Dial Plan?

Please Help me. Thanks!!

taitan · Post by **taitan** » Wed Jan 21, 2015 4:58 pm

Use SIP client which supports ICE.

WebRTC based SIP clients use ICE.
But most non-WebRTC SIP clients don't support ICE.

If your SIP client (on UDP) doesn't support ICE, you need to use a WebRTC gateway.
For example, Brekeke PBX v3.4 can work as a getaway which converts SDP between WebRTC client and non-WebRTC client.

taitan · Post by **taitan** » Wed Jan 21, 2015 5:00 pm

FYI:
http://wiki.brekeke.com/wiki/WebRTC

lperezu · Post by **lperezu** » Thu Jan 22, 2015 7:21 am

Taitan,

What softphone you recommend for this test?

I tried it with Express Talk but now the error is Bad Media Description when the call is answered.

Please Helpme.

taitan · Post by **taitan** » Thu Jan 22, 2015 11:16 am

You can make a call between WebRTC SIP clients without any issues.

If you want to make a call to non-WebRTC SIP softphone from WebRTC client, a softphone must support ICE, DTLS and SRTP because these protocols are required by WebRTC. (I don't know such a softphone yet..)

Otherwise you need a WebRTC gateway to covert these protocols.