Need to make extensions from purchased lines

[Daaani]

We have bought aditional DID's from our provider and I need some help converting those in actual usable extensions.
For example last didgits of the actual number we own are xxx.255.1262. and I need to convert it to a working extension that ends in xxx.315.5105
I have a NEC (NEAX2000 IVS2)system and Dterm series E terminals

Thank you in advance and your haste in response is GREATLY appreciated.

 

[3racefan3]

Digit Conversion is done in CMD 76XX.
7600>1262>XXX XXX = 000 thru 999
7601>000>5105 Day mode
7602>000>5105 Night mode
If memory serves me you will also need set up 12 as 804 in CMD200.