User guide

Technical Details164
PBX Networking
The code digits to be used for seizing a route with open number-
ing are not transmitted to the destination PBX and thus cannot be
evaluated by it. To reseize a route (for example for a callback),
you must set the appropriate digit prefixes in the bundle configu-
ration for the routes to be reseized.
Tip: If, for example, you are configuring a route which can be
seized using routing code “5” and have selected one or more bun-
dles for this route, change the Prefix for dest. call number at
incoming internal setting to “5” for this bundle in order to ena-
ble the route to be reseized.
Due to their hardware properties, not all S
0
ports of the
Forum 523/524 can be fully used for TK system networking.
Depending on the type of system, some ports can only be oper-
ated in the L1-Master mode or the L1-Slave mode. The external
S
0
ports can be set according to the following table.
Legend
S = Slave
M/S = Master/Slave
Note: The S
0
ports on extension cards can be operated in both
the L1-Master mode as well as the L1-Slave mode.
S
0
1S
0
2
Forum 523/524 S M/S