Nortel Networks NN43001-121 manual MCM 3.0 configuration

MCM 3.0 configuration 149

Configuring MCM for Remote Call Control For Remote Call Control, the Nortel MCM application that resides within the Office Communications Server domain provides support for authorizing TR/87 service requests and redundancy.

Authorization of TR/87 service MCM supports authorization of Remote Call Control service requests from Office Communicator clients. The following is a summary of the authorization algorithm:

1.The SIP INVITE "from" header provides the Requestor Identity (for example, the Office Communications Server user identity).

2.The CSTA XML message provides the Controlled Device Identity (for example, the phone URI).

3.The Owner Identity is found by a reverse lookup using the Controlled Device Identity found in Item 2 as a query to Active Directory (Search Active Directory, Find the User whose msRTCSIP-Line equals "Controlled Device ID", then find the msRTCSIP-PrimaryUserAddress of that User).

4.If a result is found in Item 3, the Owner Identity is equal to the Requestor Identity, and msRTCSIP-OptionFlags has RCC enabled, then approve the request. Otherwise, reject the request.

The primary function of MCM when authorization is enabled, is to ensure that an Office Communicator user can use Remote Call Control only for the phone URI, and that Remote Call Control SIP URI as configured in Active Directory for that user by the System Administrator as depicted in Figure 51 "Enable phone integration on the client" (page 150). Placing control in the hands of the System Administrator is necessary in environments where users must not override their phone integration configuration through the manual phone integration option in Office Communicator.

Note: Disabling TR/87 authorization on the MCM is strongly discouraged. When this functionality is disabled, users can override their active directory configuration and control any DN in the system that is provisioned to support SIP CTI.

Nortel Communication Server 1000

Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007

NN43001-121 01.03 Standard

Release 5.0 30 April 2008

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