Mapping dial strings to SIP endpoints

When you configure SIP-based calling, you will define routes that map each device's dial string to its designated SIP endpoint, and rules that define how that mapping works. When a user dials a string to initiate a call, the routing rules are consulted and if a matching dial string format is found, the call is routed to the associated SIP endpoint, which in turn directs the call to the corresponding telephone or device. Create a table like the one shown here, where you specify a dial string pattern, the name of the SIP endpoint that services calls matching that pattern, and the name of the end-user device that receives the call; this will help you define routes and routing rules.

The dial string specifies a pattern that the user must exactly match when initiating a call to a particular device. In the dial string, each "X" represents exactly one digit from 0 through 9. For example, if you use the mapping shown in the table, 514XX means that the Sametime® user could dial 514[0-9][0-9] and this five-digit number would route to the Avaya Session Manager and from there be directed to a user's Avaya desk phone.