[cisco-voip] MS Teams Direct Routing

[Danilo Peguero]

Here are some key elements in the SIP INVITE message:
    1. From: "| Albert Einstein | March 14, 1879" sip:+16462931236 at 10.100.101.41;tag=3962664~ec5b4b96-a721-4d7a-97e1-93e2cb320577-17937987
    * This indicates the caller information, including the display name ("Albert Einstein | March 14, 1879") and the caller's SIP URI.
    2. To: sip:+16462931240 at 10.104.253.47
    * This is the destination SIP URI, representing the called party's number.
    3. Call-ID: 61229780-1ef1532f-26efc7-2965640a at 10.100.101.41
    * A unique identifier for the call.
    4. P-Asserted-Identity: "| Albert Einstein | March 14, 1879" sip:+16462931236 at 10.100.101.41
    * This header provides information about the caller's identity, similar to the "From" field.
    5. Remote-Party-ID: "| Albert Einstein | March 14, 1879" sip:+16462931236 at 10.100.101.41;party=calling;screen=yes;privacy=off
    * This header contains information about the remote party (caller) and their screen status.
    6. Contact: sip:+16462931236 at 10.100.101.41:5060;transport=tcp;video;audio;+u.sip!devicename.ccm.cisco.com="CSFAEINSTEIN";bfcp;x-cisco-client=desktop
    * The contact header specifies the SIP URI where the calling party can be reached.
    7. Session-Expires: 1800
    * This header indicates the duration (in seconds) that the session is valid before it needs to be refreshed.
    8. Diversion: sip:1248 at 10.100.101.41;reason=follow-me;privacy=off;screen=yes
    * The diversion header indicates that the call is being diverted to a specific number for a specific reason.









On Monday, August 7, 2023 at 10:16:38 AM EDT, Jeffrey McHugh <jmchugh at fidelus.com> wrote: 





  


Morning folks .. curious as to what, if anything, folks are doing with MS teams direct routing via CUBE and hunt groups in CUCM? We have a client that’s looking to throw out jabber/Webex for softphone but keep CUCM hardphones. They have a quite a few hunts and would like to keep the CUCM hunt functionality intact while routing the line group DN’s to  MS Teams via SNR. My particular issue is this: 

 

What I’m seeing is that CUCM sends the initial invite, to the DNs of the users in a line group, to CUBE with the calling party name of the user being called and no info/indication that it’s a hunt. For instance, if you’re in a line group that rings in jabber, you see that the call is for that hunt group. In my scenario, in Teams, Teams only shows that the incoming call is to the user originally being called and not from the hunt. 

 

So flow is like this … user Albert Einstein calls William Shakespeare, William Shakespeare’s devices ring, then covers to a broadcast hunt. Users Nikoal Tesla and Alexander Graham Bell are in that hunt group and in Webex and jabber we see the call is for the hunt group.. On Tesla and Bell’s MS Teams client, they see the incoming call from Albert Einstein not that its from his hunt coverage. 

 

Snippet of original invite from CUCM to CUBE (albert Einstein being the original caller and the FROM: sip:+16462931240 at 10.104.253.47      being the 4 digit to e164 translation to route into MS Teams via SNR): 

 

Received:

INVITE sip:+16462931240 at 10.104.253.47:5060 SIP/2.0

Via: SIP/2.0/TCP 10.100.101.41:5060;branch=z9hG4bK26f30b32a44dc2

From: "| Albert Einstein | March 14, 1879"  sip:+16462931236 at 10.100.101.41;tag=3962664~ec5b4b96-a721-4d7a-97e1-93e2cb320577-17937987

To: sip:+16462931240 at 10.104.253.47

Date: Mon, 07 Aug 2023 14:12:04 GMT

Call-ID:  61229780-1ef1532f-26efc7-2965640a at 10.100.101.41

Supported: timer,resource-priority,replaces

Min-SE:  1800

User-Agent: Cisco-CUCM14.0

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

Supported: Geolocation

Call-Info: sip:10.100.101.41:5060;method="NOTIFY;Event=telephone-event;Duration=500"

Call-Info: <urn:x-cisco-remotecc:callinfo>;x-cisco-video-traffic-class=DESKTOP

Session-ID: 00002db800105000a000ef3dfa7b6e40;remote=00000000000000000000000000000000

Cisco-Guid: 1629656960-0000065536-0000000299-0694510602

Session-Expires:  1800

Diversion: sip:1248 at 10.100.101.41;reason=follow-me;privacy=off;screen=yes

Diversion: "William Shakespeare"  sip:1248 at 10.100.101.41;reason=unconditional;privacy=off;screen=yes

P-Asserted-Identity: "| Albert Einstein | March 14, 1879"  sip:+16462931236 at 10.100.101.41

Remote-Party-ID: "| Albert Einstein | March 14, 1879"  sip:+16462931236 at 10.100.101.41;party=calling;screen=yes;privacy=off

Contact:  sip:+16462931236 at 10.100.101.41:5060;transport=tcp;video;audio;+u.sip!devicename.ccm.cisco.com="CSFAEINSTEIN";bfcp;x-cisco-client=desktop

Max-Forwards: 69

Content-Length: 0


Jeffrey McHugh | Solutions Architect  --end attach--



Fidelus Technologies, LLCNamed Best UC Provider in the USA

300 Knickerbocker Rd, Suite 3300, Cresskill, NJ 07626

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