ADTRAN 1203019L2 User Manual

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10 NT1 ACE User Manual 61203019L1-1NT1 ACE User ManualExtended Passive Bus ConfigurationThis configuration allows you to connect up to eight TEs atgreater ranges than the Short Passive Bus. This group of TEscan be located at up to 3000 feet from the NT1, as shown inFigure 6. To select the Extended Passive Bus configuration,the CONFIGURATION switch must be set to the LONGposition. A termination resistor must be centrally located tothe TEs. If the TEs have internal terminating resistors thatcan be optioned, only one TE’s terminating resistor shouldbe enabled. The TERMINATION switch should be placedin the 100 position, and only one of the TEs connectedshould be terminated with 100 ohm. These switch settingsshould always be maintained, unless an external 100 ohmresistor is being used. If an external termination resistor isinstalled, set the TERMINATION switch to the NONE posi-tion.Figure 6. Extended Passive Bus ConfigurationTR TR NT1TE TE3,000 Feet** Not needed if NT1'sTermination Resistors(TR ) are used.160 Feet