I have 3 lines from our provider, the lines already connected on the PABX. Only 1 line is program.. the other 2 line is not program on the telephone.. can u give me how to program the 2 line in the telephone.

For a couple of reasons, No. However, if you access system programming, you can look at a couple of program locations to see whether the lines are turned on in software and how the system was restricted. Generally, program 400 assigns CO lines (in a TA cabinet) if the original installer used that method. The lines have to be enabled and appear on a phone to work. If you press lines 2 and 3 on the phone and the display says something, then it probably was the method used to turn them off. The other possibility was that they just restricted access by extension :-(.

It's a lot of work for nothing. That's changed in the 400's (407-409) IIRC.

Pick up a copy of your system's programming guide (PG) and it will tell you how to do it.

Carl