Controlling outbound calls using different prefixes

Whenever we need to route outbound calls through different trunks, we can use different prefixes, or patterns, or use a set of passwords (PIN Sets), or even use a trunk sequence. When our PBX has more than one trunk or line and we want to route calls in a more intelligent way, we must take advantage of the features that we currently have in our system. In this section, we will show a set of recipes for controlling outbound calls.

How to do it…

Just create an outbound route with a different prefix. If we want to use the E1 trunks, we use prefix 9; if we'd like to call through the analog lines, we use prefix 8; and so on. The next picture shows the different routes associated to different trunks: