MERLIN LEGEND Communications System Release 6.1 | Issue 1 |
Network Reference 555-661-150 | August 1998 |
5 Network Management | |
General Programming in Private Networks | Page 5-4 |
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used for emergency or other N11 calls, it should be assigned to the main pool. In this case, IXC calls determine the number of loop-starts required. Refer to Feature Reference guide for details on the PFT feature.
At the system where calls are delivered to the PSTN, digit manipulation may also be required. In the example above where calls are routed from the 908 area code to the 617 area code, the system in the 617 area code absorbs . ARS tables can be used, under some circumstances, to send calls to yet another private network system. It may be necessary to add or absorb digits for further routing.
3.Subpatterns. At the system where calls originate, set up the subpatterns for the table. In doing so, you may wish to check with the non-local system manager to ensure that the local system routes associated with the primary time period (sub-pattern A) take advantage of non-local system routes associated with the secondary time period (sub-pattern B). If the non-local system is in a different time zone from your own, you may need to take this into consideration as well.
4.Facility Restriction Levels. At the system where calls originate, assign appropriate FRLs to the routes and to the extensions that will use the private network lines. Factory settings do not restrict toll calls. At the system where calls reach the PSTN, assign an FRL to the default class-of- restriction (COR) for the type of tandem trunk (non-tie for PRI and tie for all others). “Facility Restriction Levels and Remote Access” on page 5 discusses this in detail.
Facility Restriction Levels for Extensions | 5 |
FRLs are assigned to extensions. These FRLs apply not only to ARS but to non- local UDP routing as well. Plan UDP, ARS, and extension FRLs carefully so that extension users can reach non-local extensions as needed and still be subject to required limitations on toll calling.
When local system users employ ARS in order to call out over PSTN facilities connected to a non-local system, the user’s local system applies necessary restrictions using the ARS or UDP route FRL and the extension FRL. If the caller has dialed a Remote Access code included in the non-local dial plan on the calling system, the barrier code FRL on the called system is used instead of the extension FRL (barrier codes must be required for the default COR setting applied to the type of tandem trunk used). For the call to leave the local system, the extension or barrier code FRL must be equal to or higher than the route FRL. The extension FRL has no effect after the call leaves the local system. At the remote system, the route FRL is compared to the remote access default COR FRL, which acts in place of an extension FRL on a local system. For the call to go through, the remote access default COR FRL must be equal to or higher than the route FRL.
