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: ;party=calling;screen=no;privacy=off From: ;tag=AE3694C0-BE9 To: 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: 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: ;tag=28A134F2-C32 To: 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: 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: ;tag=28A134F2-C32 To: ;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: Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGISTER,UPDATE,SUBSCRIBE,INFO Remote-Party-ID: "7001" ;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: ;tag=AE3694C0-BE9 To: ;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: 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: ;tag=AE3694C0-BE9 To: ;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: ;tag=AE3694C0-BE9 To: ;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

Workaround

Do not have voice class codec configuration. But configure specific codecs on both sides of the call.

Further Problem Description