Designating Alternate Routes For Calls - Nortel Norstar System Administration Manual

Designating alternate routes for calls

Uniform numbering plan
How Routing service works
P0607114 Issue 01
The programming for Routing service decides what path an
outgoing call takes using the digits that are dialed.
When you select an internal line and dial, the numbers you enter
are checked against the routes. If the number you dialled starts
with a destination code, the system uses the line pool and dials out
digits specified by the route assigned to that destination code, and
then dials the number that you dialled.
Routing service replaces a number of tasks that otherwise have to
be done manually, including
• entering a line pool code
• dialling an access code for a long-distance carrier
• accessing an alternate route if the Prime line is busy or
unavailable
Compact Plus can be programmed to provide dialling
transparency by using a uniform numbering plan. For example, a
worker at the head office in London can call a colleague at a
branch office in Birmingham as though they were calling an
extension in their own office.
Dialling transparency depends on establishing a numbering plan
where all extension numbers are unique and of a uniform length.
For example, if you have three company sites (two in London and
one in Birmingham), then all three sites should have the same
number of digits in their extension numbers, and each extension
number should be unique.
When performing System Start-up, you can change the starting
value and length of extension numbers as well as the Received
number length. If you apply the PBX template at System Start-up,
received numbers and the Received number length are set
automatically to match the extension numbers.
There are two headings for Routing service: Routes and
Dest codes. Under Routes, you programme DialOut and Use.
• Dial Out—specifies the digits (up to 24) to be dialled out to
reach the called extension.
• Use—defines a specific line pool to be used to make the call.
Compact Plus System Administration Guide
Services 161