The display number modification feature provides administrators the capability to modify the display format of a number (for example, from international to national format) or to add or remove the PNAC (Public/Private Network Address Code) and prefixes to or from the number before it is presented to a user.
Doing so ensures that the digits that appear in the display of the EP (Endpoint) or application (such as Desktop PE) represent a dialable number, in the format required to dial back the c partner. Depending on the call and the wishes of the customer, this can be an extension number, national number, international number, and so forth. As applicable, the dialable number can also have prefixes and PNACs prepended to it.
These capabilities are applicable for display numbers for e.g. calling parties, called parties, and connected parties. redirected parties, transferred parties, alerting parties, busy parties and connected parties.
In order for Lotus Sametime Unified Telephony to be able to transform numbers to dialable numbers, it needs to be fed with information regarding the numbers that are 'in play' in Lotus Sametime Unified Telephony.
It needs to know about network access codes and prefixes used by specific user groups.
It needs to know the definition of the public and the private numbering plans.
It needs to know how to normalize a received number.
It needs to know how to convert a public number to a private number or vice versa a private number to a public number.
It needs to know what type of number needs to be shown when presenting a user's number to another user. Users can be external (in the public network) or internal (in the private network)
For this purpose an administrator can populate the follwoing six tables in Lotus Sametime Unified Telephony:
Display Number Prefixes tableParent topic: Routing and Translation
Display Number Definitions table
Display Number Conversions table
Display Number Normalizations table
Display Number Modification table
Display Number Local Toll table
Display Number Modification Concept
Lotus Sametime Unified Telephony supports modification of presentation numbers. All numbers which are sent out by the Lotus Sametime Unified Telephony are provided either by Translation or by Display Number Modification. Display Number Modification is responsible to provide all numbers which are used for presentation purposes (e.g. calling number, alerting number, connected number, forwarding number).
Display Number Modification - Specifics
Creating Dialable Numbers
Dialable numbers are created by analyzing a given number and finding a number modification rule that applies to the presenter of the number (from) and the receiver of the number (to).
Creating Normalized Numbers
Normalized numbers are created for CSTA and also for requests that come in on the SOAP interface. An administrator can force sending normalized numbers on the SIP network interface by setting the Send Uri in Telephone Subscriber Format attribute on the SIP endpoint representing the gateway or media server to which normalized numbers need to be sent.
XLA Endpoints Table - Default Home DN
To support creating Modifications table rules where a default Home DN of an endpoint is chosen over the input number to be presented to an endpoint, the endpoints table needs to allow provisioning a default Home DN.
XLA Endpoints Table - Send Unknown Numbers
It is possible to record on the SIP-Q endpoint that numbers need to be sent with Numbering Plan Identifier and Type of Number Unknnown.
Filtered BG-specific View on DNM Tables
The Lotus Sametime Unified Telephony Assistant allows the administration of the Display Number Modification tables from the Business Groups tab. This is mainly to support hosted scenarios.