In order for a dialed number from the global numbering plan to be routed, it must have a matching entry in the PAC (prefix access code) table controlled via Lotus Sametime Unified Telephony Assistant. If Lotus Sametime Unified Telephony has subscribers in the public number block 1-561-923-xxxx, an appropriate entry needs to be made in the PAC table. This will normally be done by the Quick Add Business Group wizard, but in some cases it may need to be done manually.
Within Telephony Control Server Assistant, the administrator must make an appropriate entry in the PAC table. For this example, assume that home DN subscribers are defined in international form (including the country code – 1561923xxxx) and that the numbers supplied by gateway are in form (561923xxxx). The appropriate entry in the PAC table consists of the following items:
Prefix Access Code: As many digits as appropriate to define the dialed number block (for example, 561923).
Directory Number minimum and maximum length: Dialed number length limits (both 10 in this example).
Digit Position: number of prefix digits to delete before proceeding to the next translation step (in the example, 0).
Digits to Insert: Enter prefix digits to add to the dialed number before proceeding to the next translation step. These digits are added after the delete operation specified by the digit position is executed. In this example, the digit 1 must be added to translate the number supplied by the gateway into the form used internally.
Nature of Address: Indicates the type of the resulting number (after the delete and insert steps are completed). Possible values include national, international, PNP level 0, and so on. In this example, home DN numbers are in international form, so the correct selection is “international.”
Destination Type: Select “none” to indicate the resulting digit string will be passed to the E.164 code table for further analysis.
Destination Name: Left blank in this case, since destination type is non
It is possible (even common) that different gateways will present dialed numbers differently, so there may be a PAC table entry for (in this example) 1561923, 561923, and 8923 – all of which lead to the same entry in the E.164 code table through the PAC digit translation mechanism described above.
Generally SIP gateways do not supply a destination number “type,” such as national or international, in an incoming call seizure. For that reason, the PAC table is used to evaluate the number and (usually) assign a valid type before the number is forwarded to the E.164 code table for routing. SIP-Q gateways may supply a number type in addition to the number itself. If the incoming number type is supplied, and it is any valid value other than “unknown”, the number is not passed through the PAC table, and instead goes directly to the E.164 code table for routing.
By selecting “none” in the destination type field of the PAC access code table entry, the administrator is indicating that the number should be passed to the E.164 code table for the next routing step. Therefore, an appropriate entry is required in this table as well.
Parent topic: PAC (Prefix Access Codes)