Linksys Dial Plan Tutorial

Linksys/Sipura Dial Plan basics:
A VoIP call is initiated when the caller sends a call request to the VoIP provider’s server. Because this call request must contain the full number to which thecaller wishes to connect, the ATA must wait to send the call request until it ‘knows’ the full number the caller is dialing. The ATA is programmed to consider dialing complete (and send or reject thecall request) in the following circumstances:
1. A certain period of time has passed since the last digit was dialed, or
2. The pound key (#) has been pressed, or
3. A pattern in the dialplan has been uniquely matched (e.g., it’s not possible that a different pattern in the plan could still be matched if more digits are dialed), or
4. A pattern in the dial plan has been matched (notunique—dialing more digits could match a different pattern) and a specified period of time has passed since the last digit was dialed.
Timers:
There are two timer values that work in hand with thedial plan, the “interdigit long timer” and the “interdigit short timer”. The long timer, by default set to 10seconds, is the time the ATA will wait before rejecting a call if the digits dialed so fardo not match any dial plan pattern. The short timer, by default set to 3seconds, is the time the ATA will wait before sending a call if the digits dialed so far match a dial plan pattern, but, ifadditional digits are dialed a different pattern could be matched.
Timer example:
Say your dial plan is very simple—you can dial any 10-digit number or any 7-digit number. Such a dial plan would looklike this (dial plan syntax will be described later):
(xxxxxxx|xxxxxxxxxx)
• If you were to dial six digits, the sequence you’ve dialed does not match any of the dial plan patterns (your choices are 7or 10 digits). The ATA would wait until the long timer expires before rejecting your call due to non-match to your dial plan. The same thing would happen if you dial 8or 9 digits.
• If you were to...