Black Box ISU2011-4-EURO manual Operation, Maintenance, Displays and Controls Displays, Cleaning

BRI-Hub

Operation

No service is needed during operation.

Cable shorts at one TE port only affect the power feeding voltage of all ports if they are internally connected. To reduce this effect self-healing fuses are connected to each port.

The current version of the BRI-Hub cannot clear problems with cable reversals of the TE pair (Pins 3 and 6 of the RJ-45). If one of the connected TEs has such a pair reversal, no operation is possible since the pulses sent by different TEs have different polarity.

Displays and Controls

Displays

Pwr	is on (green), when the BRI-Hub is operating. I.e. the power supply is active.
	This may be the power adaptor or the power feeding when using the 'S' option
	(BRI-Hub-S)
Controls
Term	On: (down position). Both pairs of the NT port are terminated (100Ω ).
	Off: (up position). Termination resistors off.

Maintenance

Cleaning

To clean the BRI-Hub use a damp piece of cloth or antistatic cloth. Please do not use scoring or alcoholic fluids.

Caution! Never clean the BRI-Hub wet. This may cause short circuits inside the device.

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