18 Overview | Nortel Networks Confidential |
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authentication fails since the database does not have the subscriber's information. As a result, the call is blocked.
Administrators can configure whether they want a call from an unknown foreign domain authenticated or not. System administrators can also specify foreign proxies in the NodalAuth field of the Authentication tab. In this way, no requests originating from those proxies are failed because of authentication.
Note: The following definitions apply:
•Local Domain: Local domains are provisioned for and serviced by a particular SIP Application Module. Subscribers for a particular system belong to local domains. Local domains are provisioned through the Provisioning Client.
•Foreign Domain: A foreign domain is a domain that is either provisioned as foreign for this SIP Application Module or not provisioned at all for this specific system. It basically represents a domain that is not served.
Converged PC service
The Converged PC service allows end users to use their PCs for the multimedia portion of their communications while using their existing telephony system for voice. The service uses the simring feature on an existing telephony system to send mirrored calls to the SIP Application Module through the SIP PRI Gateway. This allows the SIP Application Module to present a call window on the end user's PC when the user's desktop phone rings.
If both parties in a call are Converged users, they will each get a call window from which they can initiate multimedia sessions such as Instant Messaging and collaborative applications between each other.
Some benefits of providing multimedia services using the Converged service are:
•End users can keep using their existing telephone and its capabilities.
•There is no need to replace an existing telephony switch to add multimedia capabilities.
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