Assigning digit analysis for Precedence Routing

Last Updated : Oct 04, 2016 |

About this task

Digit analysis determines what routes are used for outgoing calls based on the digits dialed.

Procedure

  1. Enter change precedence-routing analysis n, where n is the digit or digits being analyzed.

    Except for the Preempt Method field, the digit analysis administration is the same as Automatic Route Selection (ARS) and Automatic Alternate Routing (AAR) digit analysis.

  2. Format the Dialed String field for routing DSN numbers:

    • For non-WNDP dialing, enter the precedence digit and the address digits. The precedence digit is usually a number from 0 to 4.

    • For WNDP dialing, enter the precedence digit, the route code, and the address digits. The precedence digit is usually a number from 0 to 4.

      An x in the digit string is a wildcard that matches any single digit.

      The Preempt Method field has two possible values, group and route. The default preemption is group.

      With group preemption:

    1. The system checks the first trunk group in the route pattern to determine if any trunks are idle.

      If the system finds an idle trunk, the system connects the call.

    2. If no trunks are idle, the system checks the same trunk group to determine if any trunks are preemptable.

      If the system finds a preemptable trunk, the system preempts the current call and connects the new call.

    3. If no trunks are idle or preemptable, the system checks the next trunk group to determine if any trunks are idle.

      If the system finds an idle trunk, the system connects the call.

    4. If no trunks are idle, the system checks the same trunk group to determine if any trunks are preemptable.

      If the system finds a preemptable trunk, the system preempts the current call and connects the new call.

    5. If the system does not find an idle trunk or a preemptable trunk within the Precedence Call Timeout interval, the caller hears either the Blocked Precedence recorded announcement or reorder tone.

      For more information, see Announcements for Precedence Calling. Calls with Routine precedence cannot preempt any other calls. If a call with Routine precedence does not find an idle trunk, the caller receives busy tone.