To Build A Route For A Secondary Carrier; Programming For Least-Cost Routing; Using Multiple Routes And Overflow Routing - Nortel BCM50 Configuration Manual

252 Chapter 25 Dialing plan: Routing configurations
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Tips: To minimize the effort involved in preparing destination codes, set the digit
absorption to 0. When digital absorption is set to 0, the actual digits dialed by a caller are
preserved in the dial-out sequence. The need to program a dial out sequence as part of the
route depends on the required dialout.

Programming for least-cost routing

It can be less expensive to use another long distance carrier at a different time of day. Continuing
with the example used in
used for long distance service after 6 p.m. because that is when rates become competitive. For the
system to do this automatically, you must build another route.

To build a route for a secondary carrier

1
Create a route for the trunks and assign it to the Normal schedule. Refer to
through a dedicated trunk" on page
2
If all the required numbers are defined in the dial string, clear the External Number field.
3 Choose the line pool that contains the local service carrier lines.
4 Now you need to create a destination code and assign the route to the Night schedule.
In this case, the change in route uses the start and stop times for Night Schedule.
5 Create 91 as a Destination code.
6 Make sure Absorbed length is set at 1.
7
Under Night schedule: enter the route you defined in step 1.
Calls that begin with the digits 91 travel out without using the access code when the Night
schedule becomes active or when you turn it on at a control telephone.

Using multiple routes and overflow routing

If all the lines used by a route specified by a destination code are busy when a call is made, you can
program other routes that the system automatically flows the calls to, or you can allow the call to
overflow directly to the Normal route schedule (usually the most expensive route). However, this
only takes effect if an active schedule is applied to the line. Overflow routing is not available in
Normal mode.
You must create overflow routes for each destination code for which you want to allow overflow
routing.
NN40020-603 NN40020-603
Figure 74, the lines that supply local service in normal mode are also
250.
"Setting up a route