View source for Calling from a Substation

== Calling From a Substation ==
Substations have fewer keys than normal intercom stations.  Usually they have no 0-9 dialing keypad but one, two or three call keys, and possibly the M-key and the C-key. The call keys are used for calling predetermined numbers (single-touch keys).

To make a call, just press the appropriate key. Each substation may call up to two freely pre-programmed directory numbers. Substations are useful in a wide range of applications, such as door stations with one key or elevator alarm stations programmed to call or make a Call Request to a control room.

=== Additional Information ===
* Key no 3 on substation 1000 704400 will not work as it makes use of the ID + LT signal, which is not supported by the AlphaCom exchange.
* Keys on other substations modified to use the ID + LT signal will not work with the AlphaCom exchange.