Lucent Technologies 555-661-150 manual Automatic Route Selection ARS

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 5-3
	Automatic Route Selection (ARS)	5

This topic describes two aspects of ARS as it is used in private networks:

■The general steps for setting up ARS in order to facilitate the use of PSTN facilities by non-local users

■ARS Facility Restriction Levels (FRLs) assigned to extensions and how their operation differs in a private network.

There are no new ARS programming procedures for private networked systems. However, existing procedures are used differently and the planning required for ARS takes the whole private network into consideration rather than just a single system.

Setting Up ARS for Private Network Use 5

This topic describes the steps for modifying ARS in order to allow calling out on PSTN facilities connected to a non-local system in the private network. It also provides tips for system managers whose local PSTN lines/trunks are being accessed by remote users. This section does not summarize ARS procedures but instead points out the factors that you must consider. Before reviewing this information, read Chapter 2,”Call-Handling Scenarios” and Chapter 4, “Security.” For programming procedures and details, see “Automatic Route Selection” in System Programming.

Follow these general steps:

1.Pools. Assign tandem trunks to pools.

2.ARS Tables and Digit Manipulation. At the system where calls originate, use one or more ARS tables for routing private network calls. The type of table required depends upon how users in your system will employ private networked lines. Typically, you might need an Area Code table. For example, if the remote system is in the 617 area code and your local system is in the 908 area code, the Area Code Table that you set up might include the entry ￿￿￿.

All tables that specify tandem trunk pools must prefix the ARS access code of the remote system.

For all fully programmable ARS tables, ARS tables 17 & 18, Dial 0 table, and Special Numbers table, the Remote Access code must not be programmed in the prepended digits attributes table of each table.

!CAUTION:

Unless private networked systems are collocated, each system should have at least one loop-start line connected to the PSTN. The line is required to allow connection of a power-failure telephone to the Power-Failure Transfer (PFT) jack on a module as a power outage backup and for correct routing of emergency and other N11 calls. To ensure that the correct services are reached, if the loop-start line is