Black Box BRTS-100 User Manual
CUSTOMER
SUPPORT
INFORMATION
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Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
OCTOBER 1994
TS675A
BRTS-100 ISDN Test Set
PASS FAIL
TEST STATUS
PHAN
TO
M
PINS 7-8
AUX
POW
ER
LINE
TEST
RECEIVE
INITIATE
LINE
SPEAKER
TERMINATE
100 OHM
POWER
OFF ON
ON OFF
REV NORM
TRACE
TONE
LEVEL -6dB
TRANSMIT
“D” ACTIVITY
IMPEDANCE
CONTINUITY
GRN “1” RED “0”
BRTS-100
ISDN Test Set
18
18
A
B
1
FCC STATEMENT
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio-frequency energy, and if not
installed and used properly, that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio communication. It has been tested
and found to comply with the limits for a Class A computing device in accordance
with the specifications in Subpart B of Part 15 of FCC rules, which are designed to
provide reasonable protection against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct
the interference.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
2
BRTS-100 ISDN TEST SET
NORMAS OFICIALES MEXICANAS (NOM)
ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de
que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que
sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá
a lo descrito en las instrucciones de operación. Todo otro servicio deberá ser
referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,
alfombra o superficie similar puede bloquea la ventilación, no se debe colocar
en libreros o gabinetes que impidan el flujo de aire por los orificios de
ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del
tipo descrito en el instructivo de operación, o como se indique en el aparato.
3
NOM STATEMENT
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización
del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen del
aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas
de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea
usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
4
BRTS-100 ISDN TEST SET
TRADEMARKS USED IN THIS MANUAL
Any trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.
5
CONTENTS
Contents
Chapter Page
1.Specifications.....................................................................................................2
2.Introduction.......................................................................................................3
2.1 Overview.......................................................................................................3
2.2 How to Use This Manual.............................................................................3
2.3 Features ........................................................................................................4
3.Operation...........................................................................................................5
3.1 Overview.......................................................................................................5
3.2 Connecting the Unit....................................................................................5
3.3 Powering Up the Unit..................................................................................7
3.4 Controls and Indicators...............................................................................7
3.5 Modes of Operation.....................................................................................8
4.Test Procedures..................................................................................................9
4.1 Overview.......................................................................................................9
4.2 Comprehensive Troubleshooting Procedure ..........................................11
4.3 Check Power...............................................................................................14
4.4 Check Loop................................................................................................15
4.5 Passive Bus—Check Terminations............................................................19
4.6 Pair Reversal...............................................................................................22
4.7 Monitor.......................................................................................................26
5.Technical Reference........................................................................................28
5.1 Power-Source Indicators............................................................................28
5.2 Activation/Deactivation Modes ................................................................29
5.3 AC Impedance ...........................................................................................32
5.4 DC Continuity............................................................................................32
5.5 Speaker.......................................................................................................34
Appendix: Maintenance.....................................................................................35
6
BRTS-100 ISDN TEST SET
1. Specifications
Input/Output — (2) modular 8-pin jacks (included)
ISDN Interface — S/T
Line Type — ISDN BRI
Nominal Data Rate — 192 kbps
Power — 9-VDC battery
Size — 7.3"H x 3.3"W x 1.1"D (18.5 x 8.3 x 2.8 cm)
Weight — 11 oz. (311.8 g)
7
CHAPTER 2: Introduction
2. Introduction
2.1 Overview
The BRTS-100 ISDN Test Set is a portable, hand-held, communication-line
tester that helps you troubleshoot and verify ISDN S/T interface lines (see
Figure 2-1). The Test Set supports a variety of comprehensive tests designed
to help telephone and ISDN craft technicians isolate line problems.
2.2 How to Use This Manual
This manual is written for the user who wants a quick guide for
troubleshooting—and for the more technical user who wants to understand
how the unit operates.
The novice user should read chapters one through three inclusively. The
more advanced user can skip chapter three and read chapter four instead.
Refer to the appendix at the end of this user’s guide for maintenance
information, including how to change the 9-volt battery.
The manual is divided into the following sections:
1.Specifications
2.Introduction — Contains an overview of this manual and provides a brief
description of the Test Set’s features.
3.Operation — Describes how the unit operates, including the controls and
indicators. This chapter also contains suggested test configurations.
4.Test Procedures — Explains various product applications and some
suggested step-by-step troubleshooting guides.
5.Technical Reference — Provides an in-depth discussion of Test Set
components and how the Test Set performs a variety of tests.
Appendix — Maintenance — Includes how to replace the 9- VDC battery
and the 8-pin jack.
8
BRTS-100 ISDN TEST SET
Figure 2-1. The BRTS-100 ISDN Test Set.
2.3 Features
This compact, rugged ISDN S/T interface line test set provides many essential
diagnostic functions. It’s easy to use, too, requiring very little knowledge
about complex ISDN protocols. The Test Set:
• Verifies physical layer (Layer 1) parameters.
• Checks for D Channel Access.
• Is lightweight and hand-held.
• Derives power from a 9-volt battery.
• Includes easy-to-use, Pass/Fail LEDs that give instantaneous test results.
• Can monitor a D Channel.
• Samples every frame on the line (one every 250 microseconds).
• Supports various modes of operation for fault isolation.
• Can be used in either passive bus or point-to-point configurations.
• Verifies DC Continuity.
• Features Power Indication lamps that indicate battery presence and
polarity.
• Generates a 4-KHz test tone.
• Includes a speaker that allows audio monitoring of line activity.
P
A
S
S
F
A
IL
TEST STA TUS
P
H
A
N
T
O
M
P
IN
S
7
-
8
A
U
X
POWER
L
IN
E
T
E
S
T
RECEIVE
INITIATE
LINE
SPEAKER
TERMINATE
100 OHM
POWER
OFF ON
ON OFF
REV NORM
T
R
A
C
E
T
O
N
E
LEVEL -6dB
TRANSMIT
“D” ACTIVITY
IMPEDANCE
CONTINUITY
GRN “1” RED “0”
B
R
T
S
-100
IS
D
N
T
est S
et
18
18
A
B
9
CHAPTER 3: Operation
3. Operation
3.1 Overview
You can operate the BRTS-100 ISDN Test Set in a variety of modes. Select
them by turning the selector dial on the left of the unit (see Figure 3-1). The
indicator lights (LEDs) on top of the unit indicate test results. The various
test modes and indicator lights are explained in more detail below.
3.2 Connecting the Unit
In the shipping box, you’ll find:
• The BRTS-100 ISDN Test Set.
• (1) 9-volt battery.
• An RJ-45-to-RJ-45 cable.
• (4) RJ-45-to-alligator-clips cable.
Attach one end of the RJ-45-to-RJ-45 cable to either port A or port B at the top
of the Test Set. Attach the other end to a standard 8-pin phone jack. Attach
one end of the second cable (the RJ-45-to-alligator-clips) to the A or B port on
the Test Set and the other end to a telephone block. The alligator clips are
color coded as follows:
COLOR SIGNAL PIN NUMBER
Black TX 3
Red RX 4
Green RX 5
Yellow TX 6
You can use the Test Set in either a point-to-point or a passive-bus mode
(see Figure 3-2).
10
BRTS-100 ISDN TEST SET
Figure 3-1. BRTS-100 ISDN Test Set controls and indicators.
P
A
S
S
F
A
I
L
TEST STA TUS
P
H
A
N
T
O
M
P
IN
S
7
-
8
A
U
X
POWER
L
IN
E
T
E
S
T
RECEIVE
INITIATE
LINE
SPEAKER
TERMINATE
100 OHM
POWER
OFF ON
ON OFF
REV NORM
T
R
A
C
E
T
O
N
E
LEVEL -6dB
TRANSMIT
“D” ACTIVITY
IMPEDANCE
CONTINUITY
GRN “1” RED “0”
B
R
T
S
-100
IS
D
N
T
est S
et
18
18
A
B
SPEAKER
TEST MODE
SELECT DIAL
INDICATOR LEDS
I/O PORTS A & B
(8-PIN CONNECTORS)
INDICATOR LED
FEATURE BUTTONS
11
CHAPTER 3: Operation
Figure 3-2. Connecting the Test Set for point-to-point or passive-bus
configurations.
18
18
A
B
POINT-TO-POINT
BRTS-100
ISDN TEST UNIT
TO NT1
18
18
A
B
TERMINAL
TO NT1
PASSIVE BUS
BRTS-100
ISDN TEST UNIT
12
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.
13
CHAPTER 3: Operation
NOTE: In reverse mode, the light indicators are opposite.
AUXILIARY POWER LIGHT — Indicates the presence and polarity of
auxiliary power.
Green light — Auxiliary power present, normal polarity.
Red light — Auxiliary power present, reverse polarity.
No light — No auxiliary power present.
TEST STATUS (PASS/FAIL) LIGHTS — Reflects test status.
INITIATE LIGHT (yellow LED) — The INITIATE button and light are
used in testing modes. When performing certain test functions, this LED
indicates that the INITIATE button must be pushed.
3.5 Modes of Operation
You can select a mode of operation by turning the selector dial
(see Figure 3-1).
LINE TEST — Verifies that a terminal will be able to access the D channel.
NOTE: After selecting this function with the selector, depress the INITIATE button and the test
will begin.
Pass — Good line.
Fail — Bad line.
RECEIVE — Monitors activity on the terminal’s receive pair.
Pass — Test Set is in SYNCH with the NT1.
Fail — Test Set is not in SYNCH with the NT1.
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