Hi everyone,
Some of you helped me in my previous post (long post-dial delay), and I am very grateful for that, but I'm afraid that I need your knowledge and wisdom once again.
The scenario is the same. My CS1K v5 is interconnected with an OpenScape Branch (Siemens) through a QSIG to allow internal calls between users in both systems. Now the issue is about RTP. When Nortel calls Siemens there's no RTP stream in both ways. Calls establish but without audio. When Siemens initiates the call this problem doesn't happen, only when Nortel begins the communication.
I've captured traces and I guess I identified the problem. Siemens end doesn't know how to proccess the SDP sent by Nortel. This is the media in the INVITE to Siemens:
--as2f5
Content-Type: application/sdp
Content-Length: 298
v=0
o=root 495347066 495347066 IN IP4 10.103.0.254
s=iGW OpenScapeBranch V9 R1.25.04-1
c=IN IP4 10.103.0.254
t=0 0
a=sbc:1
a=partnerfsm:3518609726_0_2340_0_0
m=audio 51754 RTP/AVP 0 8 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSuppff - - - -
a=ptime:20
a=sendrecv
--as2f5
Content-Type: application/QSIG;version="iso"
Content-Length: 80
\b\0026\002\005\004\003\200\220\243\030\003\251\203\232\034$\221\252\006\200\001\000\202\001\000\213\001\000\241\026\002\002\001\000\002\001\000\200
CXXXX MXXXX\036\002\201\203l\006I\2002633p\006\31114561\2251\001\2002\001\201
--as2f5--
Siemens answers with SIP/2.0 415 Unsupported Media Type and once established there's no RTP in both sides. My question is: Can I disable "application/QSIG" in Nortel CS1K? I want to send only G729, and both 711.
I've been searching in Element manager but can't find it, only the others codecs. MIME, Multipart Media Encapsulation, is sending "application/SDP" , which is fine, and ""application/QSIG":
MIME Multipart Media Encapsulation, Type: multipart/mixed, Boundary: "as2f5"
[Type: multipart/mixed]
First boundary: --as2f5\r\n
Encapsulated multipart part: (application/sdp)
Content-Type: application/sdp\r\n
Content-Length: 298\r\n\r\n
Session Description Protocol
Boundary: \r\n--as2f5\r\n
Encapsulated multipart part: (application/qsig)
Content-Type: application/QSIG;version="iso"\r\n
Content-Length: 80\r\n\r\n
Q.931
Last boundary: \r\n--as2f5--
How can I ged rid of this?
If you need the whole pcap just tell me and I will attach it.
Thank you everyone again.
Some of you helped me in my previous post (long post-dial delay), and I am very grateful for that, but I'm afraid that I need your knowledge and wisdom once again.
The scenario is the same. My CS1K v5 is interconnected with an OpenScape Branch (Siemens) through a QSIG to allow internal calls between users in both systems. Now the issue is about RTP. When Nortel calls Siemens there's no RTP stream in both ways. Calls establish but without audio. When Siemens initiates the call this problem doesn't happen, only when Nortel begins the communication.
I've captured traces and I guess I identified the problem. Siemens end doesn't know how to proccess the SDP sent by Nortel. This is the media in the INVITE to Siemens:
--as2f5
Content-Type: application/sdp
Content-Length: 298
v=0
o=root 495347066 495347066 IN IP4 10.103.0.254
s=iGW OpenScapeBranch V9 R1.25.04-1
c=IN IP4 10.103.0.254
t=0 0
a=sbc:1
a=partnerfsm:3518609726_0_2340_0_0
m=audio 51754 RTP/AVP 0 8 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSuppff - - - -
a=ptime:20
a=sendrecv
--as2f5
Content-Type: application/QSIG;version="iso"
Content-Length: 80
\b\0026\002\005\004\003\200\220\243\030\003\251\203\232\034$\221\252\006\200\001\000\202\001\000\213\001\000\241\026\002\002\001\000\002\001\000\200
CXXXX MXXXX\036\002\201\203l\006I\2002633p\006\31114561\2251\001\2002\001\201
--as2f5--
Siemens answers with SIP/2.0 415 Unsupported Media Type and once established there's no RTP in both sides. My question is: Can I disable "application/QSIG" in Nortel CS1K? I want to send only G729, and both 711.
I've been searching in Element manager but can't find it, only the others codecs. MIME, Multipart Media Encapsulation, is sending "application/SDP" , which is fine, and ""application/QSIG":
MIME Multipart Media Encapsulation, Type: multipart/mixed, Boundary: "as2f5"
[Type: multipart/mixed]
First boundary: --as2f5\r\n
Encapsulated multipart part: (application/sdp)
Content-Type: application/sdp\r\n
Content-Length: 298\r\n\r\n
Session Description Protocol
Boundary: \r\n--as2f5\r\n
Encapsulated multipart part: (application/qsig)
Content-Type: application/QSIG;version="iso"\r\n
Content-Length: 80\r\n\r\n
Q.931
Last boundary: \r\n--as2f5--
How can I ged rid of this?
If you need the whole pcap just tell me and I will attach it.
Thank you everyone again.