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: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:8cc951b7-86b6-0c74-1e4d-c0108c268dc2@10.232.50.91:51945;transport=tcp> 
SIP/2.0


Thanks,
Mark

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