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OCS R2 sip trunk with mitel 3300 ICP

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Last Modified: 2013-11-29
We have successfully configured communications (Mitel---sip trunk---Mediation Server) between OCS and Mitel ordinal users, however we have one small problem:
calling from Communicator to Mitel local user, Mitel user can only see calling number without name.
Name resolution works between mitel users and when calling from Mitel to OCS (OCS user can see caller's name, but Mitel user still can see only dialed number without name).

Does any one have any ideas?
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Apply all the latest updates to OCS 2007 R2.  They are available on Windows Updates when you configure for all Microsoft Updates.
Next you can enable OCS Debug Logging on the OCS Mediation server and select Mediation and S4 under Components and set Level to All and Flags to All and start logging and make a call out from Communicator to Mitel to see how the number is being passed.  That may help in understand what Mitel is receive to do the lookup against.  Inbound in Enterprise Voice Scenario OCS is going to match against Active Directory using the Location Profile Normalization Rules which you say are working.  Not sure how Mitel does the matching but between the Mediation Server logs and the Mitel logs you might find your answer.

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Commented:
We have OCS R2, all parts are fully patched.

I've done a bit of sniffing(wireshark) from mediation server along with session logging.
It seems mediation server does not pass caller's name to Mitel, so To and From fields look like:
From: <sip:+755@domain.com;user=phone>...
To: <sip:+235@<Mitel IP>;user=phone>...
Between OCS and Mediation server conversation looks a bit different:
From: <sip:+UserName@domain.com;user=phone>...
To: <sip:+235@<Mitel IP>;user=phone>...


So is there any registry keys, or hidden features, I should enable in any of OCS components, to pass name to Mitel in format
From: "UserName"<sip:+755@domain.com;user=phone>...
To: <sip:+235@<Mitel IP>;user=phone>...
or I should look in Mitel side (I have a Telephony Directory in Mitel and I expect, that Mitel should resolve 755 to UserName from there...)
OCS does not use if received or pass the "UserName" in the From.  Only what comes after the sip:.  You will need to look in the Mitel side.
Commented:
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