Interfaces and Connectible Terminals
107
Forum 550 Card 8 S0/T0: Terminating resistors activated
One end of the S
0
bus is terminated by the Forum Gateway 560; the
terminating resistors must be activated (DIP switches set to “on”).
IAE = ISDN socket (German: “ISDN Anschluss Einheit”) or ISDN terminal.
TR = Terminating Resistor, the S
0
termination. The TR must be at the
termination of the line. This can also be done by an appropriately wired IAE.
Termination on an ISDN socket
The illustration
terminating resistors.
Bus configuration: Forum Gateway 560 in the middle of an S
0
bus
If a Forum 5004/5008/5012 is connected in the middle of an S
0
bus, the
terminating resistors of the relevant S
0
interface cards must be deactivated.
1.
Remove the interface card by following the instructions in
2.
The DIP switches are protected by a plastic foil. Use a pointed tool such as
a screwdriver to slide the DIP switches down (see arrow in the illustration
Forum 550 Card 8 S0/T0: Terminating resistors deactivated
1
2
ON
IAE
IAE
TR
Forum 550
1a
1b
2a
2b
TR
TR