Connect NT and ISDN Devices to the S
0
Ports
23
Starting at the PBX you can lay the S
0
bus in one or in two directions
(divided bus).
When laying the S
0
bus into one direction, on the last ISDN wall jack the
termination resistors need to be installed. At the other end the termina-
tion resistors of the PBX are switched on via DIL switches on the circuit
board (see
If you lay the S
0
bus into two directions, the termination resistors on the
circuit board are switched off via DIL switch. Instead you must install the
necessary termination resistors on both bus ends that means in the last
ISDN wall jack (see
). The maximum length of the S
0
bus and the
maximum quantity of ISDN wall jacks is the addition of both bus parts in
this case.
You can lay the S
0
bus starting at the PBX into two directions.
A star formed wiring is not allowed.
☞
Pic. 21: Internal S
0
bus in one direction
Pic. 22: Internal S
0
bus into two directions (divided bus)
Summary of Contents for COMpact 2206 USB
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