# ARS Leading Digits

## Purpose

The Automatic Route Selection (ARS) Leading Digits form initiates the routing of trunk calls when certain digits are dialed from a station. A number of forms can be used to arrange digit strings into groups, each group with aunique set of Leading Digits. For example, an ARS assignment for the Leading Digits 9416 (the trunk access code "9" plus the area code "416") might list in the Digits Dialed field all office codes within the 416 area code.

Use this form to perform the following tasks:

- Program Automatic Route Selection

- Program Advanced Automatic Route Selection

- Program Dial Tone - Outgoing Calls

- Program Direct Outward Dialing (DOD)

- IP Networking Programming

- XNET Programming

## Conditions

None

## Field Descriptions

Parameter | Description | Default Value
Leading Digits | Leading digits is a read-only field that displays leading digits that were specified in the ARS Digits Dialed form. |
Second Dial Tone | Select "Yes" to enable second dial tone after the Leading Digits have been dialed. Select "No" to disable second dial tone. Select "Alternate" to hear dial tone from the CO after the ARS route is selected. "Alternate" Second Dial Tone will permit a user to receive trunk seizure confirmation before dialing all digits. This is useful when trunk to extension ratio is such that trunks are often busy. If the digits a user dials, after receiving CO dial tone, are permitted and COR is satisfied then the digits will be sent to the Central Office and the call proceeds. After receiving dial tone, if a user dials digits that are COR restricted then the call is denied, the trunk is dropped, and the system provides Toll Denial - Route Digits intercept handling to the caller. | No
COR Group Number | Enter a COR Group Number to impose a COR check on the calling device as soon as the Leading Digits are received. The COR Group Number is defined in the Class of Restriction Groups form where the Classes of Restriction that do NOT have access to the routes are listed. | Blank

## Example

To view examples of ARS entries, refer to ARS Programming example .