[cisco-voip] CUCM Shared Line Appearance (SIP phones)

[Mark Holloway]

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 at 10.232.50.81:49422;transport=tcp <sip:8cc951b7-86b6-0c74-1e4d-c0108c268dc2 at 10.232.50.81:49422;transport=tcp> SIP/2.0
INVITE sip:8cc951b7-86b6-0c74-1e4d-c0108c268dc2 at 10.232.50.91:51945;transport=tcp <sip:8cc951b7-86b6-0c74-1e4d-c0108c268dc2 at 10.232.50.91:51945;transport=tcp> SIP/2.0


Thanks,
Mark

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