You guys are great - I enjoy just reading through your posts. Amazing collective knowledge! It's also amazing how many people want those 4A sets - see what Charlie's Angles did for the 4A.
Don't you need to change out the dial in order to use it the 4A. I seem to recall that you could use the 4A with a special order 2500 set that had extra contacts on the dial. Wasn't that also true for a key set - that you need extra control leads in order to go off hook with the 4A and dial without picking up the headset. Does this make any sense or, as usual, am I confused?
