[cisco-voip] Specific Off-net Called Numbers Being Dropped When Called From Jabber

Fri Jan 27 08:13:16 EST 2023

Thanks Mark, that looks really promising, but I’m on 15.5 and that feature doesn’t look to have been introduced until 15.6

I’ll get a change request for an IOS upgrade in, thanks for the tip

Gary

From: Mark Turpin <mark at 9line911.com>
Date: Friday, 27 January 2023 at 13:06
To: Gary Parker <G.J.Parker at lboro.ac.uk>
Cc: voip puck <cisco-voip at puck.nether.net>, Telecommunication Managers <telecoms-managers at jiscmail.ac.uk>
Subject: Re: [cisco-voip] Specific Off-net Called Numbers Being Dropped When Called From Jabber

** THIS MESSAGE ORIGINATED OUTSIDE LOUGHBOROUGH UNIVERSITY **

** Be wary of links or attachments, especially if the email is unsolicited or you don't recognise the sender's email address. **
Try adding voice-classs sip audio forced on your ITSP facing dial-peer.

Cisco Unified Border Element Configuration Guide Through Cisco IOS XE 17.5 - Video Suppression [Cisco Unified Border Element]<https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-audio-forced.html>
cisco.com<https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-audio-forced.html>
[favicon.ico]<https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-audio-forced.html>

This will remove all m= lines like video and bfcp, etc.

—
Mark Turpin

On Jan 27, 2023, at 06:44, Gary Parker <G.J.Parker at lboro.ac.uk> wrote:

Hi folks, we’re using CUCM 12.5.1.14900-63, and CUBE on a pair of 2921 routers running IOS 15.5(3)M2. We’ve been using this configuration to route inbound and outbound PSTN calls via our TSP in the UK, Gamma, for a few years now with no major problems.

Recently, however, we changed our travel booking agent to a new company called Clarity BT and have found that none of our Cisco Jabber softphone users can call their number, 03330100045, which appears to be hosted with a company called Redcentric. Calls from any of our Cisco deskphones, and a small volume of users we have on MS Teams Voice, who also route out via Gamma using Direct Routing, can connect with no problems, as do calls from our mobiles.

The calls from Jabber fail within a second or two of being placed, with no message or tone. Looking at the SIP traces, they’re rejected with “403 Forbidden”/” Reason: Q.850;cause=57“, the CDR records this as a destCause of 57,  “Bearer capability not authorized”

I’ve raised a support case with Gamma and they’re focussing on the fact that calls from Jabber clients appear to be including SDP video information in the call setup and have asked me if it’s possible to stop Jabber sending this. I’ve set my Jabber client to not “Always start my calls with video”, but this didn’t change anything, and it’s notable that I’m successfully placing calls to the problem number from a Cisco 8865 handset that is also video enabled and sends similar video SDP information.

It's worth mentioning that the SIP sessions are all sending the bare minimum of g711ulaw, g711alaw and g729 annex b along with whatever else the device is capable of, so it’s not like it’s failing to negotiate and audio codec.

So, has anyone had similar experience and know a solution? I tried looking for ways to filter out the SDP video stuff at the CUBE, but my Google-fu failed me (although I think this is a red herring due to the 8865 always connecting.

Below is a capture of a failed call from a Jabber client to the problem number with the IP addresses obfuscated:

Jan 23 11:06:03.383: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
INVITE sip:903330100045 at xxx.xxx.xxx.xxx:5060 SIP/2.0
Via: SIP/2.0/TCP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK1ec5d7b7426e8
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.162.135> ;tag=1460625~6c2496f4-28ae-4afc-bfa9-0620307b8c3e-103494796
To: sip:903330100045@ xxx.xxx.xxx.xxx <sip:903330100045 at 158.125.3.167>
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: ebb22500-1ee1b910-1cb56-87a27d9e@ xxx.xxx.xxx.xxx <mailto:ebb22500-1ee1b910-1cb56-87a27d9e at 158.125.162.135>
Supported: timer,resource-priority,replaces
Min-SE:  1800
User-Agent: Cisco-CUCM12.5
Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY
CSeq: 101 INVITE
Expires: 180
Allow-Events: presence, kpml
Supported: X-cisco-srtp-fallback,X-cisco-original-called
Call-Info: sip: xxx.xxx.xxx.xxx:5060<sip:158.125.162.135:5060>;method="NOTIFY;Event=telephone-event;Duration=500"
Call-Info: <urn:x-cisco-remotecc:callinfo>;x-cisco-video-traffic-class=DESKTOP;x-cisco-qos-tcl=true
Session-ID: 7b390f7500105000a000a860b63b96d1;remote=00000000000000000000000000000000
Cisco-Guid: 3954320640-0000065536-0000002092-2275573150
Session-Expires:  1800
P-Asserted-Identity: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.162.135>
Remote-Party-ID: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.162.135> ;party=calling;screen=yes;privacy=off
Contact: sip:+441509635635@ xxx.xxx.xxx.xxx:5060;transport=tcp<sip:+441509635635 at 158.125.162.135:5060;transport=tcp>;video;audio;+u.sip!devicename.ccm.cisco.com="JFWCCGJP";bfcp
Max-Forwards: 69
Content-Type: application/sdp
Content-Length: 1583
v=0
o=CiscoSystemsCCM-SIP 1460625 1 IN IP4 xxx.xxx.xxx.xxx
s=SIP Call
c=IN IP4 xxx.xxx.xxx.xxx
b=TIAS:3968000
b=AS:3968
t=0 0
a=cisco-mari:v1
a=cisco-mari-rate
m=audio 22946 RTP/AVP 114 9 104 105 0 8 18 111 101
a=extmap:14/sendrecv http://protocols.cisco.com/timestamp#100us
a=rtpmap:114 opus/48000/2
a=rtpmap:9 G722/8000
a=rtpmap:104 G7221/16000
a=fmtp:104 bitrate=32000
a=rtpmap:105 G7221/16000
a=fmtp:105 bitrate=24000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:111 X-ULPFECUC/8000
a=fmtp:111  max_esel=1420;m=8;max_n=32;FEC_ORDER=FEC_SRTP
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=trafficclass:conversational.audio.avconf.aq:admitted
m=video 27310 RTP/AVP 126 97 111
b=TIAS:3968000
a=label:11
a=extmap:14/sendrecv http://protocols.cisco.com/timestamp#100us
a=rtpmap:126 H264/90000
a=fmtp:126 profile-level-id=42801F;packetization-mode=1;max-mbps=244800;max-fs=8161;max-rcmd-nalu-size=32000;level-asymmetry-allowed=1
a=imageattr:126 recv [x=[32:1:1920],y=[18:1:1080],par=1.7778,q=1.00]
a=rtpmap:97 H264/90000
a=fmtp:97 profile-level-id=42801F;packetization-mode=0;max-mbps=244800;max-fs=8161;level-asymmetry-allowed=1
a=imageattr:97 recv [x=[32:1:1920],y=[18:1:1080],par=1.7778,q=1.00]
a=rtpmap:111 X-ULPFECUC/90000
a=fmtp:111  max_esel=1420;m=8;max_n=32;FEC_ORDER=FEC_SRTP
a=content:main
a=rtcp-fb:* ccm fir
a=rtcp-fb:* ccm tmmbr
a=rtcp-fb:* nack pli
a=trafficclass:conversational.video.avconf.aq:admitted
m=application 32782 RTP/AVP 125
a=rtpmap:125 H224/4800
a=rtcp:32783

Timestamp: 3757316763383
UTC Timestamp:3757316763383

Jan 23 11:06:03.399: //3261567/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Sent:
INVITE sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.49.229>  SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACA21CA
Remote-Party-ID: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 157.231.232.90> ;party=calling;screen=yes;privacy=off
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 157.231.232.90> ;tag=EEDE6F4-203B
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.49.229>
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE:  1800
Cisco-Guid: 3954320640-0000065536-0000002092-2275573150
User-Agent: Cisco-SIPGateway/IOS-15.5.3.M2
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Timestamp: 1674471963
Contact: sip:+441509635635@ xxx.xxx.xxx.xxx:5060<sip:+441509635635 at 157.231.232.90:5060>
Expires: 180
Allow-Events: telephone-event
Max-Forwards: 68
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 723
v=0
o=CiscoSystemsSIP-GW-UserAgent 8484 5909 IN IP4 xxx.xxx.xxx.xxx
s=SIP Call
c=IN IP4 xxx.xxx.xxx.xxx
t=0 0
m=audio 18606 RTP/AVP 0 8 18 101
c=IN IP4 xxx.xxx.xxx.xxx
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
m=video 19886 RTP/AVP 119 98
c=IN IP4 xxx.xxx.xxx.xxx
b=TIAS:3968000
a=rtpmap:119 H264/90000
a=fmtp:119 profile-level-id=42801F;packetization-mode=1;max-mbps=245000;max-fs=8192
a=rtpmap:98 H264/90000
a=fmtp:98 profile-level-id=42801F;packetization-mode=0;max-mbps=245000;max-fs=8192
a=label:11
a=content:main
m=application 32130 RTP/AVP 125
c=IN IP4 xxx.xxx.xxx.xxx
a=rtpmap:125 H224/4800

Timestamp: 3757316763399
UTC Timestamp:3757316763399

Jan 23 11:06:03.399: //3261564/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 100 Trying
Via: SIP/2.0/TCP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK1ec5d7b7426e8
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.162.135> ;tag=1460625~6c2496f4-28ae-4afc-bfa9-0620307b8c3e-103494796
To: sip:903330100045@ xxx.xxx.xxx.xxx <sip:903330100045 at 158.125.3.167>
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: ebb22500-1ee1b910-1cb56-87a27d9e@ xxx.xxx.xxx.xxx <mailto:ebb22500-1ee1b910-1cb56-87a27d9e at 158.125.162.135>
CSeq: 101 INVITE
Allow-Events: telephone-event
Server: Cisco-SIPGateway/IOS-15.5.3.M2
Content-Length: 0

Timestamp: 3757316763399
UTC Timestamp:3757316763399

Jan 23 11:06:03.415: //3261567/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACA21CA
From: sip:#133415#+441509635635@ xxx.xxx.xxx.xxx <sip:#133415#+441509635635 at 157.231.232.90> ;tag=EEDE6F4-203B
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.49.229>
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
CSeq: 101 INVITE
Timestamp: 1674471963
Content-Length: 0

Timestamp: 3757316763415
UTC Timestamp:3757316763415

Jan 23 11:06:03.539: //3261567/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 403 Forbidden
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACA21CA
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.49.229> ;tag=3883460763-1759542453
From: sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 157.231.232.90> ;tag=EEDE6F4-203B
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
CSeq: 101 INVITE
Allow: PUBLISH,MESSAGE,UPDATE,PRACK,SUBSCRIBE,REFER,INFO,NOTIFY,OPTIONS,BYE,INVITE,ACK,CANCEL
Contact: sip:03330100045@ xxx.xxx.xxx.xxx:5060<sip:03330100045 at 88.215.49.229:5060>
Content-Length: 0

Timestamp: 3757316763539
UTC Timestamp:3757316763539

Jan 23 11:06:03.543: //3261567/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Sent:
ACK sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.49.229>  SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACA21CA
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 157.231.232.90> ;tag=EEDE6F4-203B
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.49.229> ;tag=3883460763-1759542453
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
Max-Forwards: 70
CSeq: 101 ACK
Allow-Events: telephone-event
Content-Length: 0

Timestamp: 3757316763543
UTC Timestamp:3757316763543

Jan 23 11:06:03.543: //3261567/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Sent:
INVITE sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.61.3>  SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACB1AD5
Remote-Party-ID: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.3.167> ;party=calling;screen=yes;privacy=off
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.3.167> ;tag=EEDE784-154C
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.61.3>
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE:  1800
Cisco-Guid: 3954320640-0000065536-0000002092-2275573150
User-Agent: Cisco-SIPGateway/IOS-15.5.3.M2
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 102 INVITE
Timestamp: 1674471963
Contact: sip:+441509635635@ xxx.xxx.xxx.xxx:5060<sip:+441509635635 at 158.125.3.167:5060>
Expires: 180
Allow-Events: telephone-event
Max-Forwards: 68
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 723
v=0
o=CiscoSystemsSIP-GW-UserAgent 8484 5909 IN IP4 xxx.xxx.xxx.xxx
s=SIP Call
c=IN IP4 xxx.xxx.xxx.xxx
t=0 0
m=audio 18606 RTP/AVP 0 8 18 101
c=IN IP4 xxx.xxx.xxx.xxx
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
m=video 19886 RTP/AVP 119 98
c=IN IP4 xxx.xxx.xxx.xxx
b=TIAS:3968000
a=rtpmap:119 H264/90000
a=fmtp:119 profile-level-id=42801F;packetization-mode=1;max-mbps=245000;max-fs=8192
a=rtpmap:98 H264/90000
a=fmtp:98 profile-level-id=42801F;packetization-mode=0;max-mbps=245000;max-fs=8192
a=label:11
a=content:main
m=application 32130 RTP/AVP 125
c=IN IP4 xxx.xxx.xxx.xxx
a=rtpmap:125 H224/4800

Timestamp: 3757316763543
UTC Timestamp:3757316763543

Jan 23 11:06:03.559: //3261567/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACB1AD5
From: sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.3.167> ;tag=EEDE784-154C
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.61.3>
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
CSeq: 102 INVITE
Timestamp: 1674471963
Content-Length: 0

Timestamp: 3757316763559
UTC Timestamp:3757316763559

Jan 23 11:06:03.719: //3261567/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 403 Forbidden
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACB1AD5
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.61.3> ;tag=3883460763-92077787
From: sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.3.167> ;tag=EEDE784-154C
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
CSeq: 102 INVITE
Allow: UPDATE,PRACK,INFO,NOTIFY,REGISTER,OPTIONS,BYE,INVITE,ACK,CANCEL
Contact: sip:03330100045@ xxx.xxx.xxx.xxx:5060<sip:03330100045 at 88.215.61.3:5060>
Content-Length: 0

Timestamp: 3757316763719
UTC Timestamp:3757316763719

Jan 23 11:06:03.723: //3261564/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 403 Forbidden
Via: SIP/2.0/TCP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK1ec5d7b7426e8
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.162.135> ;tag=1460625~6c2496f4-28ae-4afc-bfa9-0620307b8c3e-103494796
To: sip:903330100045@ xxx.xxx.xxx.xxx <sip:903330100045 at 158.125.3.167> ;tag=EEDE83C-F2E
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: ebb22500-1ee1b910-1cb56-87a27d9e@ xxx.xxx.xxx.xxx <mailto:ebb22500-1ee1b910-1cb56-87a27d9e at 158.125.162.135>
CSeq: 101 INVITE
Allow-Events: telephone-event
Server: Cisco-SIPGateway/IOS-15.5.3.M2
Reason: Q.850;cause=57
Content-Length: 0

Timestamp: 3757316763723
UTC Timestamp:3757316763723

Jan 23 11:06:03.723: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
ACK sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.61.3>  SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK21EACB1AD5
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.3.167> ;tag=EEDE784-154C
To: sip:03330100045@ xxx.xxx.xxx.xxx <sip:03330100045 at 88.215.61.3> ;tag=3883460763-92077787
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: C2BCC425-9A4411ED-87C69C55-4AD4D9AA@ xxx.xxx.xxx.xxx <mailto:C2BCC425-9A4411ED-87C69C55-4AD4D9AA at 157.231.232.90>
Max-Forwards: 70
CSeq: 102 ACK
Allow-Events: telephone-event
Content-Length: 0

Timestamp: 3757316763723
UTC Timestamp:3757316763723

Jan 23 11:06:03.723: //3261564/EBB225000000/SIP/Msg/ccsipDisplayMsg:
Received:
ACK sip:903330100045@ xxx.xxx.xxx.xxx:5060<sip:903330100045 at 158.125.3.167:5060> SIP/2.0
Via: SIP/2.0/TCP xxx.xxx.xxx.xxx:5060;branch=z9hG4bK1ec5d7b7426e8
From: "Gary Parker" sip:+441509635635@ xxx.xxx.xxx.xxx <sip:+441509635635 at 158.125.162.135> ;tag=1460625~6c2496f4-28ae-4afc-bfa9-0620307b8c3e-103494796
To: sip:903330100045@ xxx.xxx.xxx.xxx <sip:903330100045 at 158.125.3.167> ;tag=EEDE83C-F2E
Date: Mon, 23 Jan 2023 11:06:03 GMT
Call-ID: ebb22500-1ee1b910-1cb56-87a27d9e@ xxx.xxx.xxx.xxx <mailto:ebb22500-1ee1b910-1cb56-87a27d9e at 158.125.162.135>
User-Agent: Cisco-CUCM12.5
Max-Forwards: 70
CSeq: 101 ACK
Allow-Events: presence, kpml
Content-Length: 0

Timestamp: 3757316763723
UTC Timestamp:3757316763723

--
Gary Parker
Unified Communications Service Manager
Loughborough University, IT Services
Phone - +441509635635<tel:+441509635635>
Teams - g.j.parker at lboro.ac.uk<callto:g.j.parker at lboro.ac.uk>
https://www.osx.ninja/pubkey.txt

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