The External Caller ID feature provides the subscriber with a second number which must be used for all external calls, incoming and outgoing.
The external caller ID customization feature provides the ability to provision a secondary calling party number, rather than the actual calling party number, to be used for presentation to called parties located outside the BG (Business Group).
This ability is useful if the subscriber:
when the subscriber's Directory Number (Home DN) is a Private number (i.e. L2, L1 or L0 number). In this case, the subscriber's Directory Number cannot be used for external calls.
if the subscriber wants to hide his Directory Number for calls to (or from) the public network.
The administrator uses Lotus Sametime Unified Telephony Assistant to create a BG for the gateway to be used by the NP (Numbering Plan) of the subscribers that require the distinctive external caller ID handling. When creating this BG, the administrator performs the usual tasks associated with doing so.
The administrator then uses the Calling Number Permanent Presentation Status service to specify the secondary calling party number in the External Caller ID field.
The external caller ID is subject to display number modification.
Parent topic: Routing and Translation