Section 700 - Operation

Appendix A. ARS and TRS Operation

Leading Digits Table

The leading digits table considers the initial dialed digits in determining the restriction TRS level.

Up to 10 digits can be considered. The digits may be any number 0, 1-9. In addition a wild card (*) may be used to occupy any digit position. For instance *11 would consider the numbers 011, 111, 211, 311, 411, 511, 611, 711, 811, 911.

When considering the prefix string, the system will always consider the longest exact match first. For instance, the prefix string 404 match would be followed before 40.

A wild card is always considered last. For instance if 911 were dialed and both 911 and *11 were prefix strings, the 911 would be followed.

If additional digits need to be considered, a prefix ID can be used to cross-reference the Analyze Digits Table.

Once the system determines an exact match, the system will determine from this table the number of digits that are to be dialed and the restriction TRS level. (There are two other entries in the Leading Digits Table - Route Type and Route Number. These are not used for TRS-only operation.)

Note that TRS operation is a match then restrict feature. If there is no match, there is no restriction. Make certain that there is a match. As a catch all, use the * wild card.

Note: With TRS is used in a system behind another PBX, the PBX access code does not have to be processed by TRS

Analyze Digits Table

If the Leading Digits Table contains a Prefix ID, the system will consider all appearances of this Prefix ID to look for an exact match. Up to 8 digits are considered (in addition to the prefix dial digits).

Once the system determines an exact match, the system determines from this table the number of digits that can are expected to be dialed and the restriction TRS level. (There are two other entries in the Analyze Digits Table - Route Type and Route Number. There are not used for TRS-only operation.)

ARS/TRS Features

When ARS is used in the DBS 576 system, TRS also operates.

TRS Class Features

These are the same features as for TRS (see above).

TRS Class - ARS Routing

TRS Level

For each of the 50 TRS classes, a TRS Level of 0-9may be assigned. (This is not done on a Trunk group basis since the ARS system determines the trunk group used.)

When a call is originated, this TRS value is used to determine the originator’s TRS level. From the dialed digits, a restriction TRS level (0-8) is determined. If the originator’s TRS level does not exceed the restriction TRS level, the call is restricted. The higher the originator’s TRS level, the less the restriction. If the originator’s TRS level is 0, no outside calls are allowed. If the originator’s TRS level is 9, all outside calls are allowed since this will always exceed the restriction TRS value (maximum of 8).

576-13-700

DBS 576 (USA), Revised 6/11/98

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Panasonic 524X07801B manual ARS/TRS Features, Leading Digits Table