Understanding Route Patterns and Their Digit Patterns

A route pattern is an entity configured for a dial plan to allow calls that meet its criteria to be routed and to specify the trunks to be used for that purpose. A route pattern specifies a digit pattern against which called numbers are matched.

A digit pattern determines which called numbers are routed through a trunk belonging to the route pattern.

A digit pattern can be:

• A pattern that allows for a broad or narrow range of matches. For example, if a called number matches the digit pattern 91xxxxxxxxxx, which allows for calls to anywhere in the United States, the call is routed using one of the trunks configured for the route pattern.
• A trunk access code prefix. Calls can be directed to a specific trunk using a trunk access code. When a called number specifies a trunk access code prefix and a route pattern in the dial plan contains the trunk access code as its digit pattern, the call is routed out a trunk configured for that route pattern. For example, an administrator might decide to dedicate a trunk to be used specifically for calls to the Bangalore office. A trunk access code could be used for this purpose.
• A specific number, for example 9-1-1 for emergency calls.

Trunks used to route matching calls are added to a trunk group that is included in a route pattern. A route pattern specifies the type of call that it pertains to. For example, the call type (call-type) for the digit pattern 91xxxxxxxxxx, which allows for long-distance calls, would be specified as long-distance-call. A route pattern can also specify a digit transform rule to specify how the digits of the called number are manipulated before the call is routed.

Integrated Convergence Services supports the following special characters that you can use to specify digit patterns:

Related Topics

• Understanding the SRX Series Survivable Call Server Dial Plan
• Understanding Digit Transform Rules and Digit Manipulation
• Example: Configuring Integrated Convergence Services to Provide VoIP Support for a Branch Using a PBX Device