How to correctly create dialing rules for a specific group?

Question

Asterisk

Good day,
There is Elastix 2.4
There is a group of numbers 6000-6020
It is necessary to do something so that when they dial the city number of Taganrog XXX-XXX automatically substituted the city code 8634
It seems that I already looked everywhere, it’s not visible, but I’m not a special specialist in Elastix, I could and skip, tell me, I will be very grateful.

Answer 1

In Outbound Routes, specify in the template
Prepend: 8634
Pattern: XXXXXX