Operational Features
41-001160-04 Rev 02, Release 2.5
5-17
Configuring Operational Features
Emergency Dial Plan and Pattern Matching
The IP Phones support emergency dialing using pattern matching and prepend
dial plan functionality.
There are two ways to dial a number on the phone:
•
dialing digit-by-digit (i.e., select line and dial)
•
dialing by string (i.e., pre-dial then go off-hook)
When a user dials digit-by-digit, the phone adds every digit to a dialed string and
checks against the dial plan. If the phone is not locked, it checks against the
regular dial plan. If the phone is locked, it checks against the emergency dial plan.
When a user dials by string, (pre-dial, speed-dial, etc., and then goes off-hook),
and the phone is not locked, it checks to see if the number matches the emergency
dial plan. If it doesn’t match, it blocks the call from going through. If the phone is
locked, and the number matches the emergency dial plan it allows the call to go
through.
Adding a pre-pend to a dial plan also works with both dialing digit-by-digit and
dialing by string.
Limitation
The following is a limitation for emergency dial plans with pattern matching:
•
Secondary dial tone is not supported.
You can set the emergency dial plan via the configuration files or the Aastra Web
UI.
Configuring an Emergency Dial Plan
Use the following procedures to specify the numbers to use on your phone for
dialing emergency services in your area.
Configuration Files
For specific parameters you can set in the configuration files, see Appendix A, the section,
“Emergency Dial
Plan Settings”
on
page A-16.
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