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BRTS-100 ISDN TEST SET
To connect the Test Set in a point-to-point configuration, simply connect the
8-pin plug to either the A or B port located on top of the unit. To connect
the Test Set in a passive bus configuration, connect the line from the NT1 to
either the A or B port, and connect the termi-nal to the other port. The ports
are parallel, so they can be used interchangeably (see Figure 3-2).
3.3 Powering Up the Unit
Power up the Test Set up by depressing the POWER feature button (Figure 3-
1). During operation, the unit automatically performs a battery check. If the
battery is low, the unit will beep for approximately 30 minutes.
AUTOMATIC POWER DOWN. If the Test Set does not sense any activity on
the line for approximately 10 minutes, it will automatically power down. In a
4-KHz Tone Trace, the Automatic Power Down circuit is disabled.
3.4 Controls and Indicators
Feature Buttons
Feature buttons (Figure 3-1) operate in two modes—in or out. Pushing the
button will toggle it to the other mode.
INITIATE — Certain test modes require that you press the INITIATE key.
Whenever this is necessary, the INITIATE lamp (yellow LED) will light.
LINE — Lets the user put the loop in NORMal or REVerse modes. In
REVerse mode, the Test Set transposes the transmit and receive pairs.
When the LINE button is out, the unit is in NORMal mode.
SPEAKER — Turns on the speaker. The speaker lets you hear all the
transmissions on the line. Voice transmissions are digitized over the ISDN
line and therefore will not be decipherable over the speaker.
TERMINATE — The Test Set normally provides a 100-ohm termination
to the line. When pressed (in), the Test Set removes the 100-ohm
termination from the line.
POWER — Turns the Test Set on and off.
Indicators
PHANTOM LIGHT — Indicates the presence and polarity of battery power.
Green light — Battery present, normal polarity.
Red light — Battery present, polarity reversed.
No light — No battery present.