
Chapter 6 Setting up VoIP trunks for outgoing calls 117
IP Telephony Configuration Guide
The number you choose will also depend on the type of dialing plan the network is using.
Networks with CDP dialing plans have unique system codes. However, with networks using
UDP, this is not always the case, therefore, you need to be careful with the routing to ensure
that the codes you choose are unique to the route. This will also affect the number of digits that
have to be added or absorbed. It is helpful to use the Programming Records to plan network
routing so you can determine if there will be any conflicts with the destination codes you want
to use.
4 Click the Save button to close the dialog box.
Configuring the schedules for the destination codes
Under the destination code heading you created in the previous section, click the Schedules key,
then choose the appropriate schedules:
VoIP schedule for all fallback destination codes
Figure 36 VoIP schedule
1 Change First Route to the route you configured for your VoIP line.
2 Set the Absorbed length to absorb the amount of the destination code that is not part of the
dialout for the trunk.
For example: If the remote gateway destination digit is 2, which is part of the remote system
DN structure (CDP network), and you specified a destination code of 82, set this field to 1, so
that the 2 is still part of the dialout.
If the destination code is different from the remote gateway destination digits, and you entered
an External # into the route record (the destination digit for the remote system), set the
absorbed length to the number of digits in the destination code. The system will dial out the
External # you entered in front of the rest of the number that the user dialed. This would occur
if the network is set up with a UDP dialing plan.
Note: Do not add alternative routes (second or third). Since fallback is active, the system
immediately falls back to the Normal schedule if the first route is not available.
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