I belive you can button map the Co lines from other cabs, however, if someone does an intercom call, it causes all sort of confusion.
Say 700-112 calls 701-140. 701-140 puts the other guy on hold. Now the guy on cab 700 is hearing hold music, however guy at 701 shows nothing on his display as to where the hold is. No hold light, nothing.
So after the hold time out, the caller at cab 700, will follow his call forwarding (which will happen, as cab 701 cannot recover the call). So now 700-112 is getting answered by 700-100 (or whatever his forwarding goes to).
