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New Member

SDP is requiested by ITSP but we are using delayed offer

Hi all

after configuring the SIP trunk to ITSP some calls to some numbers gives fast busy tone, so after checking the logs we got the following :



Sent:
INVITE sip:sip:3333333@10.208.9.69:5060 SIP/2.0
Via: SIP/2.0/UDP 192.29.55.102:5060;branch=z9hG4bK378DEDE
Remote-Party-ID: "TEST A"<sip:2222222@192.29.55.102>;party=calling;screen=yes;privacy=off
From: "TEST A"<sip:2222222@192.29.55.102>;tag=658BEE34-22E5
To: <sip:3333333@10.208.9.69>
Date: Tue, 02 Sep 2014 07:17:34 GMT
Call-ID: B6FE096-31A811E4-A371D48D-F9AAAD14@192.29.55.102
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE:  1800
Cisco-Guid: 3158903424-0000065536-0000009367-0019441856
User-Agent: Cisco-SIPGateway/IOS-15.2.1.T4
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Timestamp: 1409642254
Contact: <sip:2222222@192.29.55.102:5060>
Expires: 180
Allow-Events: telephone-event
Max-Forwards: 68
Session-Expires:  1800
Content-Length: 0



Received:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.29.55.102:5060;branch=z9hG4bK378DEDE
Call-ID: B6FE096-31A811E4-A371D48D-F9AAAD14@192.29.55.102
From: "TEST A"<sip:2222222@192.29.55.102>;tag=658BEE34-22E5
To: <sip:3333333@10.208.9.69>
CSeq: 101 INVITE
Content-Length: 0


Received:
SIP/2.0 503 Service Unavailable
Via: SIP/2.0/UDP 192.29.55.102:5060;branch=z9hG4bK378DEDE
Record-Route: <sip:10.208.9.69:5060;transport=udp;lr>
Call-ID: B6FE096-31A811E4-A371D48D-F9AAAD14@192.29.55.102
From: "TEST A"<sip:2222222@192.29.55.102>;tag=658BEE34-22E5
To: <sip:3333333@10.208.9.69>;tag=sbc0806ifmsh3is
CSeq: 101 INVITE
Reason: Q.850;cause=41;text="temporary failure"
Warning: 399 - "SoftX3000 R601-CCU Rel POS:[3103] Release from CR"
Content-Length: 0

 

 

and when we contacted the ITSP for This "Temporary Failure" they said that they are not receiving any SDP with the early media , but as you can see this is a delayed offer as it is the default behavior of CUCM.

 

how can we change the CUCM to early media with SDP without using MTP?

 

Notes:

calls to other numbers going from the same outgoing dial-peer are working with no issue

(we are using CUCM 10.5)

 

Thanks in advance

  • IP Telephony
1 ACCEPTED SOLUTION

Accepted Solutions

Under the SIP profile, there

Under the SIP profile, there is a setting to enable Early Offer - best effort. This will not insert MTP. Create a new SIP profile and make changes to that profile and assign it to the SIP trunk. 

You could also force early offer on the CUBE by adding the command 'early-offer forced'. 

Please rate useful posts.
2 REPLIES

Under the SIP profile, there

Under the SIP profile, there is a setting to enable Early Offer - best effort. This will not insert MTP. Create a new SIP profile and make changes to that profile and assign it to the SIP trunk. 

You could also force early offer on the CUBE by adding the command 'early-offer forced'. 

Please rate useful posts.
New Member

Thank you very much  i

Thank you very much  i already did that today and it worked

 

but i want to know why this is only happening with some calls only ?

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