$CALL command used in AlphaNet (Event Handler)

The $CALL command can have local station dir. no. (9/x) or a global station dir. no. (83/x) as A-subscriber parameter. If the A-subscriber is a global station dir. no. the whole message will be forwarded to that node, and executed there.
This means that the B-subscriber must be defined in that node as a local or global number.

Example:
- An external data device (PC) is connected to node 1
- Station 1234 is node 2
- Station 5678 is node number 3

$Call L1234 L5678 will set up the call betwen the stations. Requires that:
- 1234 is defined as global number (83/2) in node 1
- 5678 is defined as global number (83/3) in node 2

Alternatively:
$CALL L1234 L(3)5678 will set up the call betwen the stations. Requires that:
- 1234 is defined as global number (83/2) in node 1