Home DN (Directory Number) dialing via the PNP (Private Numbering Plan) and extension to the GNP (Global Numbering Plan) tables allows digit-based dialing to be routed to a globally usable set of entries for all business groups and PNPs, to include globally defined gateways/endpoints.
Like home DN dialing via PNP, it does not leverage any of the extension-based services of the PNP (location code and extension tables), providing a quick and minimal set of entries in the PNP and extending them to be further processed in the GNP tables that mirror the configuration of routing strategies for external gateways/endpoints. It can be used to process calls both within a PNP, between PNPs in the same business group, and even between business groups defined in the Lotus Sametime Unified Telephony, as it uses the global tables accessible to all Lotus Sametime Unified Telephony business groups and PNPs.
This strategy uses the PAC (Prefix Access Code) prefix type of On-Net Access or Off-Net Access to mark this call type as digit-based calling, and sends the digits to a GNP PAC with an NOA (Nature of Access) of Unknown and E.164 destination selected, so that it can be processed and routed via global tables.
This method requires the definition of a PNP PAC that is used to send digits to a GNP PAC that can further provide translations, but most specifically to change the NOA to the required type that will allow a match to the Home DN tables. From the GNP PAC, the digits are processed by the Global E.164 Code table, then sent to the proper Home DN table required.
Parent topic: Routing and Translation