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Cisco Bug: CSCur21230 - Codec preservation is not working for calls over hunt pilot on CME

Last Modified

Sep 14, 2019

Products (81)

  • Cisco IOS
  • Cisco 888W Integrated Services Router
  • Cisco VG204XM Analog Voice Gateway
  • Cisco 2951 Integrated Services Router
  • Cisco 812 CiFi Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 819 Hardened Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
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Known Affected Releases

15.3(3)M2

Description (partial)

Symptom:
Codec preservation is not working for calls over hunt pilot on CME . But it is working for direct calls.

Conditions:
Call flow: Mobile >> SIP Provider >> SIP >> CME >> hunt pilot (pilot:7005 members sip extn 7001 and sip extn 7002 , parallel) >> 7001 
IOS: 15.3(3)M2 

++ In the above call flow issue experienced while provider only advertise codec G711alaw and when extension 7001 is configured with codec preference G711ulaw followed by G711alaw. 
++ For the calls coming in over pilot 7005 , when CME send invite to extension 7001 it advertises both G71ulaw and G711alaw. Later phone selects the codec G711ulaw and call fails as provider only support G711alaw. 
++ If it is a direct call, CME only advertise codec g711alaw to extn 7001. 


Log snippet from LAB router 
= = = = = = = = = = = = = = = = 

! 
voice class codec 1 
codec preference 1 g711ulaw 
codec preference 2 g711alaw 
! 
! 
voice register dn 1 
number 7001 
! 
! 
voice register pool 2 
busy-trigger-per-button 1 
id mac 649E.F335.03EF 
type 6941 
number 1 dn 1 
voice-class codec 1 
paging-dn 14 
! 
! 
voice hunt-group 11 parallel 
list 7001,7002 
pilot 7005 
! 


++ Received Invite to Pilot 7005 with codec G711alaw 

010291: Sep 23 16:21:03.427: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg: 
Received: 
INVITE sip:7005@10.106.110.70:5060 SIP/2.0 
Via: SIP/2.0/UDP 10.106.110.80:5060;branch=z9hG4bK2D41D17 
Remote-Party-ID: <sip:3001@10.106.110.80>;party=calling;screen=no;privacy=off 
From: <sip:3001@10.106.110.80>;tag=AE3694C0-BE9 
To: <sip:7005@10.106.110.70> 
Date: Sun, 05 Feb 2006 07:52:43 GMT 
Call-ID: 390F65BC-955311DA-8384FD73-C313CF3F@10.106.110.80 
Supported: 100rel,timer,resource-priority,replaces,sdp-anat 
Min-SE: 1800 
Cisco-Guid: 0939990159-2505249242-2206203251-3272855359 
User-Agent: Cisco-SIPGateway/IOS-12.x 
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER 
CSeq: 101 INVITE 
Max-Forwards: 70 
Timestamp: 1139125963 
Contact: <sip:3001@10.106.110.80:5060> 
Expires: 180 
Allow-Events: telephone-event 
Content-Type: application/sdp 
Content-Disposition: session;handling=required 
Content-Length: 417 

v=0 
o=CiscoSystemsSIP-GW-UserAgent 5677 2273 IN IP4 10.106.110.80 
s=SIP Call 
c=IN IP4 10.106.110.80 
t=0 0 
m=audio 16646 RTP/AVP 8 100 19 
c=IN IP4 10.106.110.80 
a=rtpmap:8 PCMA/8000 
a=rtpmap:100 X-NSE/8000 
a=fmtp:100 192-194,200-202 
a=rtpmap:19 CN/8000 
a=ptime:20 
a=X-sqn:0 
a=X-cap: 1 audio RTP/AVP 100 
a=X-cpar: a=rtpmap:100 X-NSE/8000 
a=X-cpar: a=fmtp:100 192-194,200-202 
a=X-cap: 2 image udptl t38 

++ Sending Invite to hunt member 7001 with codec G711ulaw and G711alaw 

INVITE sip:7001@10.106.110.96:5060 SIP/2.0 
Via: SIP/2.0/UDP 10.106.110.70:5060;branch=z9hG4bK8213C9 
From: <sip:3001@10.106.110.70>;tag=28A134F2-C32 
To: <sip:7001@10.106.110.96> 
Date: Tue, 23 Sep 2014 10:51:03 GMT 
Call-ID: 58E20927-424611E4-8A6E9CC2-4113B33E@10.106.110.70 
Supported: timer,resource-priority,replaces 
Min-SE: 1800 
Cisco-Guid: 0939990159-2505249242-2206203251-3272855359 
User-Agent: Cisco-SIPGateway/IOS-15.3.3.M2 
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER 
CSeq: 101 INVITE 
Timestamp: 1411469463 
Contact: <sip:3001@10.106.110.70:5060> 
Expires: 180 
Allow-Events: telephone-event 
Max-Forwards: 69 
Content-Type: application/sdp 
Content-Disposition: session;handling=required 
Content-Length: 242 

v=0 
o=CiscoSystemsSIP-GW-UserAgent 8700 5322 IN IP4 10.106.110.70 
s=SIP Call 
c=IN IP4 10.106.110.70 
t=0 0 
m=audio 16528 RTP/AVP 0 8 19 
c=IN IP4 10.106.110.70 
a=rtpmap:0 PCMU/8000 
a=rtpmap:8 PCMA/8000 
a=rtpmap:19 CN/8000 
a=ptime:20 


++ Phone accepts with codec G711ulaw 

010384: Sep 23 16:21:06.885: //2397/38071C8F837F/SIP/Msg/ccsipDisplayMsg: 
Received: 
SIP/2.0 200 OK 
Via: SIP/2.0/UDP 10.106.110.70:5060;branch=z9hG4bK8213C9 
From: <sip:3001@10.106.110.70>;tag=28A134F2-C32 
To: <sip:7001@10.106.110.96>;tag=649ef33503ef04aa000040d5-00000372 
Call-ID: 58E20927-424611E4-8A6E9CC2-4113B33E@10.106.110.70 
Date: TUE, 23 SEP 2014 10:51:06 GMT 
CSeq: 101 INVITE 
Server: Cisco-CP6941/9.3.1 
Contact: <sip:16878-1986@10.106.110.96:5060;transport=udp> 
Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGISTER,UPDATE,SUBSCRIBE,INFO 
Remote-Party-ID: "7001" <sip:7001@10.106.110.70>;party=called;id-type=subscriber;privacy=off;screen=yes 
Supported: replaces,join,sdp-anat,norefersub,resource-priority,extended-refer,X-cisco-callinfo,X-cisco-serviceuri,X-cisco-escapecodes,X-cisco-service-control,X-cisco-srtp-fallback,X-cisco-monrec,X-cisco-config,X-cisco-sis-6.0.0,X-cisco-xsi-8.5.1 
Allow-Events: kpml,dialog 
Content-Length: 151 
Content-Type: application/sdp 
Content-Disposition: session;handling=optional 

v=0 
o=Cisco-SIPUA 15698 0 IN IP4 10.106.110.96 
s=SIP Call 
t=0 0 
m=audio 20526 RTP/AVP 0 
c=IN IP4 10.106.110.96 
a=rtpmap:0 PCMU/8000 
a=sendrecv 

++ Send 200 ok back to provider with codec G711ulaw 

Sent: 
SIP/2.0 200 OK 
Via: SIP/2.0/UDP 10.106.110.80:5060;branch=z9hG4bK2D41D17 
From: <sip:3001@10.106.110.80>;tag=AE3694C0-BE9 
To: <sip:7005@10.106.110.70>;tag=28A1351C-18F1 
Date: Tue, 23 Sep 2014 10:51:03 GMT 
Call-ID: 390F65BC-955311DA-8384FD73-C313CF3F@10.106.110.80 
Timestamp: 1139125963 
CSeq: 101 INVITE 
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER 
Allow-Events: telephone-event 
Contact: <sip:7005@10.106.110.70:5060> 
Supported: replaces 
Supported: sdp-anat 
Server: Cisco-SIPGateway/IOS-15.3.3.M2 
Supported: timer 
Content-Type: application/sdp 
Content-Disposition: session;handling=required 
Content-Length: 194 

v=0 
o=CiscoSystemsSIP-GW-UserAgent 4483 4818 IN IP4 10.106.110.70 
s=SIP Call 
c=IN IP4 10.106.110.70 
t=0 0 
m=audio 16526 RTP/AVP 0 
c=IN IP4 10.106.110.70 
a=rtpmap:0 PCMU/8000 
a=ptime:20 



010470: Sep 23 16:21:06.899: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg: 
Received: 
ACK sip:7005@10.106.110.70:5060 SIP/2.0 
Via: SIP/2.0/UDP 10.106.110.80:5060;branch=z9hG4bK2D522AA 
From: <sip:3001@10.106.110.80>;tag=AE3694C0-BE9 
To: <sip:7005@10.106.110.70>;tag=28A1351C-18F1 
Date: Sun, 05 Feb 2006 07:52:43 GMT 
Call-ID: 390F65BC-955311DA-8384FD73-C313CF3F@10.106.110.80 
Max-Forwards: 70 
CSeq: 101 ACK 
Allow-Events: telephone-event 
Content-Length: 0
010471: Sep 23 16:21:06.899: //2396/xxxxxxxxxxxx/CCAPI/cc_api_ha_call_active_notify: 

010472: Sep 23 16:21:06.899: call_info mainst_callID:0x95C, peer_callID:0x95D, confID:0x1B, spi_type:4, media_flo_thru:1,num_streams:1, swmtpmsp_present:0 

010473: Sep 23 16:21:06.899: //2396/xxxxxxxxxxxx/CCAPI/cc_api_ha_call_active_notify: 

010474: Sep 23 16:21:06.899: stream[0]: callid:0x95C, media_passthrough:1 
010475: Sep 23 16:21:06.899: //2396/38071C8F837F/CCAPI/cc_api_event_indication: 
Event=109, Call Id=2396 
010476: Sep 23 16:21:06.899: //2396/38071C8F837F/CCAPI/cc_api_event_indication: 
Event Is Sent To Conferenced SPI(s) Directly 
010477: Sep 23 16:21:06.899: //2396/38071C8F837F/CCAPI/cc_api_event_indication: 
Event=205, Call Id=2396 
010478: Sep 23 16:21:06.899: //2396/38071C8F837F/CCAPI/cc_api_event_indication: 
Event Is Sent To Conferenced SPI(s) Directly 
010479: Sep 23 16:21:06.899: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg: 

++ Provider disconnectes the call with cause code 65 

Received: 
BYE sip:7005@10.106.110.70:5060 SIP/2.0 
Via: SIP/2.0/UDP 10.106.110.80:5060;branch=z9hG4bK2D61314 
From: <sip:3001@10.106.110.80>;tag=AE3694C0-BE9 
To: <sip:7005@10.106.110.70>;tag=28A1351C-18F1 
Date: Sun, 05 Feb 2006 07:52:43 GMT 
Call-ID: 390F65BC-955311DA-8384FD73-C313CF3F@10.106.110.80 
User-Agent: Cisco-SIPGateway/IOS-12.x 
Max-Forwards: 70 
Timestamp: 1139125966 
CSeq: 102 BYE 
Reason: Q.850;cause=65 
P-RTP-Stat: PS=0,OS=0,PR=0,OR=0,PL=0,JI=0,LA=0,DU=2922816 
Content-Length: 0
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