Outbound Call SIP

[Leonardo Santana]

Hello,

We configured a integration with the PSTN using a SIP Trunk.

Call Flow:

IP Phone -> CUCM -> SIP -> Voice Gateway -> SIP Trunk -> PSTN

On the debug ccsip messages i see that our side is sending a cancel message to the ITSP.

Why we are sending this?

The debug and config are attached.

Thanks for the help

Leonardo Santana

[Nadeem Ahmed]

The reason you receiving 500 Internal Server Error from CUBE. as ITSP rejecting the INVITE with 420 BAD Extension and it does not support 100rel message in response to that CUBE is sending 500 error back to CUCM.

INVITE SENT TO ITSP

Sent:
INVITE sip:0019542709689@10.115.182.4:5060 SIP/2.0
Via: SIP/2.0/UDP 10.115.183.2:5060;branch=z9hG4bKF821E1
From: 24008600<sip:24008600@10.115.183.2:5060>;tag=B665C20-15D
To: <sip:0019542709689@10.115.182.4>
Date: Tue, 12 Jan 2016 02:05:53 GMT
Call-ID: D867BE7D-B80711E5-850E940F-54A652D1@10.115.183.2
Supported: timer,resource-priority,replaces,sdp-anat
 --More--         
Require: 100rel
Min-SE:  1800
Cisco-Guid: 3772177664-0000065536-0000466858-0113509642
User-Agent: Cisco-SIPGateway/IOS-15.4.3.M3
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Timestamp: 1452564353
Contact: <sip:24008600@10.115.183.2:5060>
Expires: 180
Allow-Events: telephone-event
Max-Forwards: 69
Session-Expires:  1800
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 270

Received 420 Error from ITPS

003498: *Jan 12 02:05:53.970: //645/E0D6DD000007/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 420 Bad Extension
Via: SIP/2.0/UDP 10.115.183.2:5060;branch=z9hG4bKF821E1
From: 24008600<sip:24008600@10.115.183.2:5060>;tag=B665C20-15D
To: <sip:0019542709689@10.115.182.4>;tag=aprqngfrt-2regrb30000a6
Call-ID: D867BE7D-B80711E5-850E940F-54A652D1@10.115.183.2
CSeq: 101 INVITE
Timestamp: 1452564353
Unsupported: 100rel

500 Error sent to CUCM
Sent:
SIP/2.0 500 Internal Server Error
 --More--         
Via: SIP/2.0/UDP 10.5.196.6:5060;branch=z9hG4bK113e0626b50255a
From: "Leonardo Added" <sip:3711@10.5.196.6>;tag=81731140~80f843ae-9636-4957-95d8-0e16860abb0e-24211681
To: <sip:90019542709689@10.6.7.2>;tag=B665C2C-1196
Date: Tue, 12 Jan 2016 02:05:53 GMT
Call-ID: e0d6dd00-69415f4b-d6b2f8-6c4050a@10.5.196.6
CSeq: 101 INVITE
Allow-Events: telephone-event
Server: Cisco-SIPGateway/IOS-15.4.3.M3
Reason: Q.850;cause=127
Content-Length: 0

let me check previous logs to find out something relevant to fix this issue.

Regards

Nadeem Ahmed