Adding to this... This is also the URI contained in the Contact header for SIP requests transmitted *from* the IP phone, allowing CUCM to send future requests to the phone within the same dialog using the PKID URI you're seeing. The PKID for the DN is obtained by the phone via TFTP configuration file:
<contact>ae97ba4b-2397-4b52-5ddc-07589fb380ab</contact> Hope this helps. - Dan From: cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] On Behalf Of Daniel Pagan Sent: Monday, September 14, 2015 10:44 AM To: Mark Holloway <m...@markholloway.com>; voip puck <cisco-voip@puck.nether.net> Subject: Re: [cisco-voip] CUCM Shared Line Appearance (SIP phones) The request-URI in this case is the PKID of the DN followed by the IP address of the phone. Check it out: https://10.10.13.100/ccmadmin/directoryNumberEdit.do?key=ae97ba4b-2397-4b52-5ddc-07589fb380ab ^^^URL of a test DN. Key= ae97ba4b-2397-4b52-5ddc-07589fb380ab INVITE sip:ae97ba4b-2397-4b52-5ddc-07589fb380ab@10.10.31.6:50926;transport=tcp SIP/2.0 ^^^ Check out the request URI above. Hope this helps. - Dan From: cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] On Behalf Of Mark Holloway Sent: Saturday, September 12, 2015 8:39 AM To: voip puck <cisco-voip@puck.nether.net<mailto:cisco-voip@puck.nether.net>> Subject: [cisco-voip] CUCM Shared Line Appearance (SIP phones) Hi all. When CUCM sends a SIP Invite to shared lines on SIP phones the user portion contains some sort of (what appears to b) a randomly calculated alpha-numeric string. Is there any information or documentation available on how Cisco actually calculates what this string will be? Here is an example of a SIP Invite going to two SIP phones sharing the same phone number INVITE sip:8cc951b7-86b6-0c74-1e4d-c0108c268dc2@10.232.50.81:49422;transport=tcp SIP/2.0 INVITE sip:8cc951b7-86b6-0c74-1e4d-c0108c268dc2@10.232.50.91:51945;transport=tcp SIP/2.0 Thanks, Mark
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