Linksys WIP310 SPA500 Series and WIP310 IP Phone Administration Guide - Page 185

Configuring Dial Plans About Dial Plans 8 • Informational numbers EXAMPLE: ( [1-8]xx | 9, xxxxxxx | 9, [2-9]xxxxxxxxx | 8, xxxxxxx | 9, 1 [2-9] xxxxxxxxx | 9, 1 900 xxxxxxx ! | 9, 011xxxxxx. | 0 | [49]11 ) 0 | [49]11 This example includes two digit sequences, separated by the pipe character. The first sequence allows a user to dial 0 for an operator. The second sequence allows the user to enter 411 for local information or 911 for emergency services. Acceptance and Transmission of the Dialed Digits When a user dials a series of digits, each sequence in the dial plan is tested as a possible match. The matching sequences form a set of candidate digit sequences. As more digits are entered by the user, the set of candidates diminishes until only one or none are valid. When a terminating event occurs, the IP PBX either accepts the user-dialed sequence and initiates a call, or else rejects the sequence as invalid. The user hears the reorder (fast busy) tone if the dialed sequence is invalid. The following table explains how terminating events are processed. Terminating Event Processing The dialed digits do not match any The number is rejected. sequence in the dial plan. The dialed digits exactly match one sequence in the dial plan. • If the sequence is allowed by the dial plan, the number is accepted and is transmitted according to the dial plan. • If the sequence is blocked by the dial plan, the number is rejected. A timeout occurs. The number is rejected if the dialed digits are not matched to a digit sequence in the dial plan within the time specified by the applicable interdigit timer. • The Interdigit Long Timer applies when the dialed digits do not match any digit sequence in the dial plan. The default value is 10 seconds. • The Interdigit Short Timer applies when the dialed digits match one or more candidate sequences in the dial plan. The default value is 3 seconds. Cisco SPA 500 Series and WIP310 IP Phone Administration Guide 174