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associated terminals by programming as required. All 100 Ohm terminating
resistors must be connected in the last ISDN jack installed in the ISDN bus (Fig.
19 ).
ISDN telep hone
Fig. 19: Short passive bus interface
2.4.1
"Expanded passive bus"
We recommend not installing more than three (3) ISDN jacks at the node. The
terminating resistors must be located at this node. A telecommunications
distributor frame like those available at most special dealerships can, for
example, be used as the node. There must be no further terminating resistors
installed in the subsequent ISDN jacks. The wire diameter for the example used
here is 0.6 mm.
PAB X
B us m ax. 200 m
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ISDN jac ks
ISDN telep hone
ISDN telefax
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ISDN jac k w ith
term inating resistors
PC
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