[Freeswitch-users] 488 Not Acceptable Here (INCOMPATIBLE_DESTINATION) with JsSIP and OverSIP + FreeSWITCH

Fri Jan 18 01:23:38 MSK 2013

FreeSWITCH does not currently support many new un-approved standards they are adding for WebRTC.  If you are interested in contributing to the bounty for webrtc support you can email details to consulting at freeswitch.org.

On Jan 17, 2013, at 2:24 AM, royj <royj at yandex.ru> wrote:

> 
> http://jira.freeswitch.org/browse/FS-4606
> 
> On Thu, 17 Jan 2013 02:05:34 +0530
> Paan Singh <paan.singh.coder at gmail.com> wrote:
> 
>> New SIP capture og with FreeSWITCH log syntax highlighting :
>> http://pastebin.freeswitch.com/20457
>> 
>> 
>> On Thu, Jan 17, 2013 at 12:50 AM, Paan Singh <paan.singh.coder at gmail.com>wrote:
>> 
>>> Hi,
>>> 
>>> I'm using JsSIP from a webpage to make a SIP call to FS, using OverSIP as
>>> a Websocket->SIP proxy.
>>> 
>>> I'm able to Register successfully, but when I make a call from JsSIP UA to
>>> FreeSWITCH, I get a 180 Ringing, but after that I get a 488 Not Acceptable
>>> here.. Please help me figure out what I'm doing wrong here.
>>> 
>>> 
>>> My inbound_codec_prefs is :
>>> 
>>> <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,G7221 at 32000h
>>> ,G7221 at 16000h,G722,PCMU,PCMA,GSM,isac at 16000h,isac,opus"/>
>>> 
>>> Here is FreeSWITCH's log for the incoming call :
>>> 
>>> =============================================
>>> port.c:2730 tport_wakeup_pri() tport_wakeup_pri(0x26036f0): events IN
>>> tport.c:2845 tport_recv_event() tport_recv_event(0x26036f0)
>>> tport.c:3186 tport_recv_iovec() tport_recv_iovec(0x26036f0) msg 0x2913be0
>>> from (udp/116.214.15.45:5080) has 3113 bytes, veclen = 1
>>> tport.c:3004 tport_deliver() tport_deliver(0x26036f0): msg 0x2913be0 (3113
>>> bytes) from udp/121.245.35.150:5080/sip next=(nil)
>>> nta.c:2803 agent_recv_request() nta: received INVITE
>>> sip:30201009 at 116.214.15.45 SIP/2.0 (CSeq 2141)
>>> nta.c:3161 agent_aliases() nta: canonizing sip:30201009 at 116.214.15.45with contact
>>> nta.c:3002 agent_recv_request() nta: INVITE (2141) going to a default leg
>>> nta.c:1348 set_timeout() nta: timer set to 200 ms
>>> nua_server.c:102 nua_stack_process_request() nua:
>>> nua_stack_process_request: entering
>>> nua_stack.c:899 nh_create() nua: nh_create: entering
>>> nua_common.c:108 nh_create_handle() nua: nh_create_handle: entering
>>> nua_params.c:480 nua_stack_set_params() nua: nua_stack_set_params: entering
>>> soa.c:282 soa_clone() soa_clone(static::0x26122e0, 0x2606e20,
>>> 0x7f91840c4c50) called
>>> soa.c:405 soa_set_params() soa_set_params(static::0x7f91840b25e0, ...)
>>> called
>>> nta.c:4313 nta_leg_tcreate() nta_leg_tcreate(0x7f91840356d0)
>>> soa.c:1302 soa_init_offer_answer()
>>> soa_init_offer_answer(static::0x7f91840b25e0) called
>>> soa.c:1171 soa_set_remote_sdp() soa_set_remote_sdp(static::0x7f91840b25e0,
>>> (nil), 0x285676c, 2333) called
>>> nua_dialog.c:338 nua_dialog_usage_add() nua(0x7f91840c4c50): adding
>>> session usage
>>> tport.c:3238 tport_tsend() tport_tsend(0x26036f0) tpn = UDP/
>>> 121.245.35.150:5065
>>> tport.c:4026 tport_resolve() tport_resolve addrinfo = 121.245.35.150:5065
>>> tport.c:4660 tport_by_addrinfo() tport_by_addrinfo(0x26036f0): not found
>>> by name UDP/121.245.35.150:5065
>>> tport.c:3574 tport_vsend() tport_vsend(0x26036f0): 564 bytes of 564 to udp/
>>> 121.245.35.150:5065
>>> tport.c:3472 tport_send_msg() tport_vsend returned 564
>>> nta.c:6678 incoming_reply() nta: sent 100 Trying for INVITE (2141)
>>> nua_stack.c:271 nua_stack_event() nua(0x7f91840c4c50): event i_invite 100
>>> Trying
>>> nua_session.c:4135 signal_call_state_change() nua(0x7f91840c4c50): call
>>> state changed: init -> received, received offer
>>> soa.c:1098 soa_get_remote_sdp() soa_get_remote_sdp(static::0x7f91840b25e0,
>>> [0x7f91aa98a5e8], [0x7f91aa98a5e0], [(nil)]) called
>>> nua_stack.c:271 nua_stack_event() nua(0x7f91840c4c50): event i_state 100
>>> Trying
>>> nua_stack.c:359 nua_application_event() nua: nua_application_event:
>>> entering
>>> nua.c:342 nua_handle_bind() nua: nua_handle_bind: entering
>>> 2013-01-17 00:25:27.733506 [NOTICE] switch_channel.c:968 New Channel
>>> sofia/external/1000 at 116.214.15.45:5080[4aec7fd8-600e-11e2-8706-1365ba01ad52]
>>> 2013-01-17 00:25:27.733506 [DEBUG] switch_core_session.c:975 Send signal
>>> sofia/external/1000 at 116.214.15.45:5080 [BREAK]
>>> nua_stack.c:359 nua_application_event() nua: nua_application_event:
>>> entering
>>> 2013-01-17 00:25:27.733506 [DEBUG] switch_core_session.c:975 Send signal
>>> sofia/external/1000 at 116.214.15.45:5080 [BREAK]
>>> 2013-01-17 00:25:27.733506 [DEBUG] switch_core_state_machine.c:415
>>> (sofia/external/1000 at 116.214.15.45:5080) Running State Change CS_NEW
>>> 2013-01-17 00:25:27.733506 [DEBUG] switch_core_state_machine.c:433
>>> (sofia/external/1000 at 116.214.15.45:5080) State NEW
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> 2013-01-17 00:25:27.753511 [DEBUG] sofia.c:5576 Channel sofia/external/
>>> 1000 at 116.214.15.45:5080 entering state [received][100]
>>> 2013-01-17 00:25:27.753511 [DEBUG] sofia.c:5587 Remote SDP:
>>> v=0
>>> o=- 2957375511 2 IN IP4 127.0.0.1
>>> s=-
>>> t=0 0
>>> a=group:BUNDLE audio video
>>> m=audio 40111 RTP/SAVPF 103 104 0 8 106 105 13 126
>>> c=IN IP4 121.245.35.150
>>> a=rtcp:40111 IN IP4 121.245.35.150
>>> a=candidate:877273017 1 udp 2113937151 121.245.35.150 39842 typ host
>>> generation 0
>>> a=candidate:877273017 2 udp 2113937151 121.245.35.150 39842 typ host
>>> generation 0
>>> a=candidate:4173799466 1 udp 1677729535 121.245.35.150 40111 typ srflx
>>> generation 0
>>> a=candidate:4173799466 2 udp 1677729535 121.245.35.150 40111 typ srflx
>>> generation 0
>>> a=candidate:2060051273 1 tcp 1509957375 121.245.35.150 54291 typ host
>>> generation 0
>>> a=candidate:2060051273 2 tcp 1509957375 121.245.35.150 54291 typ host
>>> generation 0
>>> a=ice-ufrag:qiKF0ErbxaXldKI0
>>> a=ice-pwd:XlMXg/i8jwnCAgwnuo9KyZBw
>>> a=ice-options:google-ice
>>> a=mid:audio
>>> a=rtcp-mux
>>> a=crypto:1 AES_CM_128_HMAC_SHA1_80
>>> inline:bX1U9Kr56lIcZBLQvS2pmRW3nAcTG9H0uahawqj2
>>> a=rtpmap:103 ISAC/16000
>>> a=rtpmap:104 ISAC/32000
>>> a=rtpmap:0 PCMU/8000
>>> a=rtpmap:8 PCMA/8000
>>> a=rtpmap:106 CN/32000
>>> a=rtpmap:105 CN/16000
>>> a=rtpmap:13 CN/8000
>>> a=rtpmap:126 telephone-event/8000
>>> a=ssrc:4278252985 cname:fMHr4uVHPcpHFfGu
>>> a=ssrc:4278252985 mslabel:OEZOjX953DJU0k0J3IKmuasdqH13b96rGxhx
>>> a=ssrc:4278252985 label:OEZOjX953DJU0k0J3IKmuasdqH13b96rGxhx00
>>> m=video 40111 RTP/SAVPF 100 101 102
>>> c=IN IP4 121.245.35.150
>>> a=rtcp:40111 IN IP4 121.245.35.150
>>> a=candidate:877273017 1 udp 2113937151 121.245.35.150 39842 typ host
>>> generation 0
>>> a=candidate:877273017 2 udp 2113937151 121.245.35.150 39842 typ host
>>> generation 0
>>> a=candidate:4173799466 1 udp 1677729535 121.245.35.150 40111 typ srflx
>>> generation 0
>>> a=candidate:4173799466 2 udp 1677729535 121.245.35.150 40111 typ srflx
>>> generation 0
>>> a=candidate:2060051273 1 tcp 1509957375 121.245.35.150 54291 typ host
>>> generation 0
>>> a=candidate:2060051273 2 tcp 1509957375 121.245.35.150 54291 typ host
>>> generation 0
>>> a=ice-ufrag:qiKF0ErbxaXldKI0
>>> a=ice-pwd:XlMXg/i8jwnCAgwnuo9KyZBw
>>> a=ice-options:google-ice
>>> a=mid:video
>>> a=rtcp-mux
>>> a=crypto:1 AES_CM_128_HMAC_SHA1_80
>>> inline:bX1U9Kr56lIcZBLQvS2pmRW3nAcTG9H0uahawqj2
>>> a=rtpmap:100 VP8/90000
>>> a=rtpmap:101 red/90000
>>> a=rtpmap:102 ulpfec/90000
>>> a=ssrc:169275022 cname:fMHr4uVHPcpHFfGu
>>> a=ssrc:169275022 mslabel:OEZOjX953DJU0k0J3IKmuasdqH13b96rGxhx
>>> a=ssrc:169275022 label:OEZOjX953DJU0k0J3IKmuasdqH13b96rGxhx10
>>> 
>>> 2013-01-17 00:25:27.753511 [DEBUG] sofia_glue.c:4978 Set Remote Key [1
>>> AES_CM_128_HMAC_SHA1_80 inline:bX1U9Kr56lIcZBLQvS2pmRW3nAcTG9H0uahawqj2]
>>> 2013-01-17 00:25:27.753511 [DEBUG] sofia_glue.c:3155 Set Local Key [1
>>> AES_CM_128_HMAC_SHA1_80 inline:i8vqmBeU4+/sjJBndCbEQ4G87gmpYeVnqxh8Xuzu]
>>> 2013-01-17 00:25:27.753511 [DEBUG] sofia_glue.c:5277 No 2833 in SDP.
>>> Disable 2833 dtmf and switch to INFO
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_channel.c:2994
>>> (sofia/external/1000 at 116.214.15:45:5080) Callstate Change DOWN -> HANGUP
>>> 2013-01-17 00:25:27.753511 [NOTICE] sofia.c:5878 Hangup sofia/external/
>>> 1000 at 116.214.15.45:5080 [CS_NEW] [INCOMPATIBLE_DESTINATION]
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_channel.c:3017 Send signal
>>> sofia/external/1000 at 116.214.15.45:5080 [KILL]
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_session.c:1291 Send signal
>>> sofia/external/1000 at 116.214.15.45:5080 [BREAK]
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:415
>>> (sofia/external/1000 at 116.214.15.45:5080) Running State Change CS_HANGUP
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:667
>>> (sofia/external/1000 at 116.214.15.45:5080) State HANGUP
>>> 2013-01-17 00:25:27.753511 [DEBUG] mod_sofia.c:503 Channel sofia/external/
>>> 1000 at 116.214.15.45:5080 hanging up, cause: INCOMPATIBLE_DESTINATION
>>> 2013-01-17 00:25:27.753511 [DEBUG] mod_sofia.c:633 Responding to INVITE
>>> with: 488
>>> nua.c:879 nua_respond() nua: nua_respond: entering
>>> nua_stack.c:529 nua_signal() nua(0x7f91840c4c50): sent signal r_respond
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:48
>>> sofia/external/1000 at 116.214.15.45:5080 Standard HANGUP, cause:
>>> INCOMPATIBLE_DESTINATION
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:667
>>> (sofia/external/1000 at 116.214.15.45:5080) State HANGUP going to sleep
>>> nua_stack.c:573 nua_stack_signal() nua(0x7f91840c4c50): recv signal
>>> r_respond 488 Not Acceptable Here
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:446
>>> (sofia/external/1000 at 116.214.15.45:5080) State Change CS_HANGUP ->
>>> CS_REPORTING
>>> nua_params.c:480 nua_stack_set_params() nua: nua_stack_set_params: entering
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_session.c:1291 Send signal
>>> sofia/external/1000 at 116.214.15.45:5080 [BREAK]
>>> soa.c:405 soa_set_params() soa_set_params(static::0x7f91840b25e0, ...)
>>> called
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:415
>>> (sofia/external/1000 at 116.214.15.45:5080) Running State Change CS_REPORTING
>>> nua_session.c:2316 nua_invite_server_respond() nua:
>>> nua_invite_server_respond: entering
>>> soa.c:1214 soa_clear_remote_sdp()
>>> soa_clear_remote_sdp(static::0x7f91840b25e0) called
>>> tport.c:3238 tport_tsend() tport_tsend(0x26036f0) tpn = UDP/
>>> 121.245.35.150:5065
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:749
>>> (sofia/external/1000 at 116.214.15.45:5080) State REPORTING
>>> tport.c:4026 tport_resolve() tport_resolve addrinfo = 121.245.35.150:5065
>>> tport.c:4660 tport_by_addrinfo() tport_by_addrinfo(0x26036f0): not found
>>> by name UDP/121.245.35.150:5065
>>> tport.c:3574 tport_vsend() tport_vsend(0x26036f0): 784 bytes of 784 to udp/
>>> 121.245.35.150:5065
>>> tport.c:3472 tport_send_msg() tport_vsend returned 784
>>> nta.c:6678 incoming_reply() nta: sent 488 Not Acceptable Here for INVITE
>>> (2141)
>>> nua_dialog.c:397 nua_dialog_usage_remove_at() nua(0x7f91840c4c50):
>>> removing session usage
>>> nua_session.c:4135 signal_call_state_change() nua(0x7f91840c4c50): call
>>> state changed: received -> terminated
>>> nua_stack.c:271 nua_stack_event() nua(0x7f91840c4c50): event i_state 488
>>> Not Acceptable Here
>>> nua_stack.c:271 nua_stack_event() nua(0x7f91840c4c50): event i_terminated
>>> 488 Not Acceptable Here
>>> soa.c:358 soa_destroy() soa_destroy(static::0x7f91840b25e0) called
>>> nta.c:4366 nta_leg_destroy() nta_leg_destroy(0x7f91840356d0)
>>> nua_stack.c:359 nua_application_event() nua: nua_application_event:
>>> entering
>>> nua_stack.c:359 nua_application_event() nua: nua_application_event:
>>> entering
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> nua.c:342 nua_handle_bind() nua: nua_handle_bind: entering
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering
>>> nua.c:921 nua_handle_destroy() nua: nua_handle_destroy: entering
>>> nua_stack.c:569 nua_stack_signal() nua(0x7f91840c4c50): recv signal
>>> r_destroy
>>> nta.c:4366 nta_leg_destroy() nta_leg_destroy((nil))
>>> nua_stack.c:529 nua_signal() nua(0x7f91840c4c50): sent signal r_destroy
>>> 2013-01-17 00:25:27.753511 [DEBUG] mod_cdr_sqlite.c:102 Writing SQL to DB:
>>> INSERT INTO cdr VALUES ("1000","1000","30201009","public","2013-01-17
>>> 00:25:27","","2013-01-17
>>> 00:25:27",0,0,"INCOMPATIBLE_DESTINATION","4aec7fd8-600e-11e2-8706-1365ba01ad52","","")
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:92
>>> sofia/external/1000 at 116.214.15.45:5080 Standard REPORTING, cause:
>>> INCOMPATIBLE_DESTINATION
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:749
>>> (sofia/external/1000 at 116.214.15.45:5080) State REPORTING going to sleep
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:440
>>> (sofia/external/1000 at 116.214.15.45:5080) State Change CS_REPORTING ->
>>> CS_DESTROY
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_session.c:1291 Send signal
>>> sofia/external/1000 at 116.214.15.45:5080 [BREAK]
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_session.c:1499 Session 1794
>>> (sofia/external/1000 at 116.214.15.45:5080) Locked, Waiting on external
>>> entities
>>> 2013-01-17 00:25:27.753511 [NOTICE] switch_core_session.c:1517 Session
>>> 1794 (sofia/external/1000 at 116.214.15.45:5080) Ended
>>> 2013-01-17 00:25:27.753511 [NOTICE] switch_core_session.c:1521 Close
>>> Channel sofia/external/1000 at 116.214.15.45:5080 [CS_DESTROY]
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:556
>>> (sofia/external/1000 at 116.214.15.45:5080) Callstate Change HANGUP -> DOWN
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:559
>>> (sofia/external/1000 at 116.214.15.45:5080) Running State Change CS_DESTROY
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:569
>>> (sofia/external/1000 at 116.214.15.45:5080) State DESTROY
>>> 2013-01-17 00:25:27.753511 [DEBUG] mod_sofia.c:396 sofia/external/
>>> 1000 at 116.214.15.45:5080 SOFIA DESTROY
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:99
>>> sofia/external/1000 at 116.214.15.45:5080 Standard DESTROY
>>> 2013-01-17 00:25:27.753511 [DEBUG] switch_core_state_machine.c:569
>>> (sofia/external/1000 at 116.214.15.45:5080) State DESTROY going to sleep
>>> nta.c:1294 agent_timer() nta: timer set next to 322 ms
>>> tport.c:2730 tport_wakeup_pri() tport_wakeup_pri(0x26036f0): events IN
>>> tport.c:2845 tport_recv_event() tport_recv_event(0x26036f0)
>>> tport.c:3186 tport_recv_iovec() tport_recv_iovec(0x26036f0) msg
>>> 0x7f9198220070 from (udp/116.214.15.45:5080) has 339 bytes, veclen = 1
>>> tport.c:3004 tport_deliver() tport_deliver(0x26036f0): msg 0x7f9198220070
>>> (339 bytes) from udp/121.245.35.150:5080/sip next=(nil)
>>> nta.c:2803 agent_recv_request() nta: received ACK
>>> sip:30201009 at 116.214.15.45 SIP/2.0 (CSeq 2141)
>>> nta.c:2938 agent_recv_request() nta: ACK (2141) is going to INVITE (2141)
>>> nta.c:1294 agent_timer() nta: timer set next to 4823 ms
>>> nta.c:7010 _nta_incoming_timer() nta: timer I fired, terminate 488 response
>>> nta.c:5718 incoming_reclaim_queued() incoming_reclaim_all((nil), (nil),
>>> 0x7f91aa98ac20)
>>> nta.c:7061 _nta_incoming_timer() nta_incoming_timer: 0/0 resent, 0/0 tout,
>>> 1/1 term, 1/1 free
>>> nta.c:1279 agent_timer() nta: timer not set
>>> ================================================================
>>> 
>>> Here is the Log from JsSIP in the browser that receives messages from
>>> FreeSWITCH :
>>> ===========================================================
>>> JsSIP | TRANSPORT | Received WebSocket text message: SIP/2.0 180 Ringing
>>> Via: SIP/2.0/TCP 29.62.109.242;branch=z9hG4bK1565615 Record-Route:
>>> <sip:192.168.1.8:5060;transport=udp;lr;ovid=69d4d6a0> Record-Route:
>>> <sip:774f80554e at 192.168.1.8:10080;transport=ws;lr;ovid=69d4d6a0> From: <
>>> sip:1000 at 116.214.15.45:5080>;tag=rj2nc38qem To: <
>>> sip:30201009 at 116.214.15.45>;tag=j4X0e04aZjU2K Call-ID:
>>> joshempnx2kuh7smrt3x CSeq: 1974 INVITE Contact:
>>> <sip:30201009 at 116.214.15.45:5080;transport=udp> User-Agent:
>>> FreeSWITCH-mod_sofia/1.3.13b+git~20130108T190107Z~30e4c71bbe Accept:
>>> application/sdp Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO,
>>> UPDATE, REGISTER, REFER, NOTIFY Supported: timer, precondition, path,
>>> replaces Allow-Events: talk, hold, conference, refer Content-Length: 0
>>> P-Asserted-Identity: "30201009" <sip:30201009 at 116.214.15.45>
>>> jssip-0.2.1.js:684<http://example.com:8080/static/did/tryit/jssip-0.2.1.js>
>>> JsSIP | DIALOG | New UAC dialog created: 1 jssip-0.2.1.js:2171<http://example.com:8080/static/did/tryit/jssip-0.2.1.js>
>>> JsSIP | EVENT EMITTER | Emitting event: progress jssip-0.2.1.js:170<http://example.com:8080/static/did/tryit/jssip-0.2.1.js>
>>> JsSIP | TRANSPORT | Received WebSocket text message: SIP/2.0 488 Not
>>> Acceptable Here Via: SIP/2.0/TCP 29.62.109.242;branch=z9hG4bK1565615
>>> Max-Forwards: 10 From: <sip:1000 at 116.214.15.45:5080>;tag=rj2nc38qem To: <
>>> sip:30201009 at 116.214.15.45>;tag=j4X0e04aZjU2K Call-ID:
>>> joshempnx2kuh7smrt3x CSeq: 1974 INVITE User-Agent:
>>> FreeSWITCH-mod_sofia/1.3.13b+git~20130108T190107Z~30e4c71bbe Allow: INVITE,
>>> ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
>>> Supported: timer, precondition, path, replaces Allow-Events: talk, hold,
>>> conference, refer Reason: Q.850;cause=88;text="INCOMPATIBLE_DESTINATION"
>>> Content-Length: 0 P-Asserted-Identity: "30201009" <
>>> sip:30201009 at 116.214.15.45>
>>> =============================================================================
>>> 