OK, I have a customer with one door phone & a door unlock unit which works fine, using '6' to open it (default settings).

What they want to do is open a 2nd door (its actually a gate), but don't want to run another cable to the 2nd gate.
Can the existing door station be configured to dial another digit 7? to open the 2nd door unlock?
As this gate isn't normally used for incoming vehicles (exit only), dialling up the door phone & pressing '7' would be adequate. Can this be done, or would it be easier to put a 2nd door phone next to the system, as a dummy?

Thanks in advance.

Kevin