Phone system using Norstar M7208 in an office. Some phones are programmed to get an outside line when you pick them up. Others are programmed to require one to hit "Intercom" and then dial 9. Can we make it uniform by reprogramming some aspect of the system? How?

Here is a bit more detail. I apologize for not providing this earlier.

We have a phone system based on the Norstar M7208. First one phone maintenance person visited to set up some phones, which I call Group A. Then another person visited and set up another set of phones, that I call Group B. Both sets of phones are part of the same system in one small office. The problem is that the two Groups behave differently, as follows:
(1) On a Group A phone, one picks up the handset and an outside line dial tone is heard. On Group B, one has to push a button labeled Intercom and then press 9 to get an outside line.
(2) On an incoming call, Group A phones can pick up the call, just by picking up the handset. On Group B, one has to press Intercom and then dial the extension number of the main (receptionist) phone to pick up the call.

We would like all the phones to behave as do Group A. Here is a bit more detail. I apologize for not providing this earlier. We have a phone system based on the Norstar M7208. First one phone maintenance person visited to set up some phones, which I call Group A. Then another person visited and set up another set of phones, that I call Group B. Both sets of phones are part of the same system in one small office. The problem is that the two Groups behave differently, as follows: (1) On a Group A phone, one picks up the handset and an outside line dial tone is heard. On Group B, one has to push a button labeled Intercom and then press 9 to get an outside line. (2) On an incoming call, Group A phones can pick up the call, just by picking up the handset. On Group B, one has to press Intercom and then dial the extension number of the main (receptionist) phone to pick up the call. We would like all the phones to behave as do Group A.

Understood for sure, but the maintenance company cannot be found, probably discorporated.... Understood for sure, but the maintenance company cannot be found, probably discorporated....