Installation Port Assignment, Termination, Cable Lengths
49
In the case of the OpenCom 100, the S
0
buses are terminated by software. You
make this setting in the S
0
port configuration in the Configurator on the Web
console.
You can connect up to eight terminals on every internal S
0
bus; up to three of the
terminals can operate without an external power supply. The length of the four-
wire cable of an internal S
0
bus must not exceed 150 m. The power consumption
of each internal S
0
bus is approx. 2 W.
S
0
Ports on Interface Cards
The S
0
bus is terminated at one end by the OpenCom 100.
IAE = ISDN socket (German: “ISDN Anschluss Einheit”) or an 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.
The S
0
bus is terminated by the TR at the ends.
Termination on an ISDN socket
OpenCom
R
IAE IAE
TR
OpenCom
R
IAE
TRTR
IAE
1a
1b
2a
2b
TR
TR
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