Hello everyone, I'm trying to build a sip trunk to a CallManager 7.1 system. The issue is every INVITE from the CallManager doesn't have an SDP (3pcc/RFC 3725). I'm looking for more of a standard INVITE w/SDP, 180/183, 200 type of dialog from the CallManager. I've tried digging through various docs, google, etc to no avail. Anyone have any hints? Thanks! -- Kristian Kielhofner http://www.astlinux.org http://blog.krisk.org http://www.star2star.com http://www.submityoursip.com http://www.voalte.com
On 05/11/2010 01:36 PM, Kristian Kielhofner wrote:
Hello everyone,
I'm trying to build a sip trunk to a CallManager 7.1 system. The issue is every INVITE from the CallManager doesn't have an SDP (3pcc/RFC 3725). I'm looking for more of a standard INVITE w/SDP, 180/183, 200 type of dialog from the CallManager. I've tried digging through various docs, google, etc to no avail. Anyone have any hints?
So where does the SDP offer/answer negotiation happen? 200 OK offer / ACK answer? -- Alex Balashov - Principal Evariste Systems LLC 1170 Peachtree Street 12th Floor, Suite 1200 Atlanta, GA 30309 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/
If you select Media Termination Point Required the preferred codec option will no longer be ghosted and you can set the codec you want. Otherwise, if you do not select MTP Required then no SDP is offered and the far end SIP endpoint should include SDP in its reply and Call Manager will honor the first supported codec in the list. On May 11, 2010, at 10:38 AM, Alex Balashov wrote:
On 05/11/2010 01:36 PM, Kristian Kielhofner wrote:
Hello everyone,
I'm trying to build a sip trunk to a CallManager 7.1 system. The issue is every INVITE from the CallManager doesn't have an SDP (3pcc/RFC 3725). I'm looking for more of a standard INVITE w/SDP, 180/183, 200 type of dialog from the CallManager. I've tried digging through various docs, google, etc to no avail. Anyone have any hints?
So where does the SDP offer/answer negotiation happen? 200 OK offer / ACK answer?
-- Alex Balashov - Principal Evariste Systems LLC 1170 Peachtree Street 12th Floor, Suite 1200 Atlanta, GA 30309 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/ _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
On Tue, May 11, 2010 at 1:38 PM, Alex Balashov <abalashov at evaristesys.com> wrote:
So where does the SDP offer/answer negotiation happen? ?200 OK offer / ACK answer?
Exactly. In my current (undesired) configuration it looks like this: INVITE w/o SDP <-- 100 Trying --> 200 OK w/ SDP (G722 and PCMU offered) --> ACK w/ SDP (PCMU accepted) <-- -- Kristian Kielhofner http://www.astlinux.org http://blog.krisk.org http://www.star2star.com http://www.submityoursip.com http://www.voalte.com
On 05/11/2010 01:47 PM, Kristian Kielhofner wrote:
On Tue, May 11, 2010 at 1:38 PM, Alex Balashov <abalashov at evaristesys.com> wrote:
So where does the SDP offer/answer negotiation happen? 200 OK offer / ACK answer?
Exactly. In my current (undesired) configuration it looks like this:
INVITE w/o SDP<-- 100 Trying --> 200 OK w/ SDP (G722 and PCMU offered) --> ACK w/ SDP (PCMU accepted)<--
Well, it _IS_ RFC-compliant ... :/ Why do you need the other, more "canonical" sequence? -- Alex Balashov - Principal Evariste Systems LLC 1170 Peachtree Street 12th Floor, Suite 1200 Atlanta, GA 30309 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/
participants (3)
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abalashov＠evaristesys.com -
kristian.kielhofner＠gmail.com -
mh＠markholloway.com