Black Box Micro T1 CSU User manual

JUNE 1999
MT120A-R2
Micro T1 CSU/DSU
CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]

1
CE NOTICE
Trademarks Used In This Manual
AT&T is a registered trademark of American Telephone and Telegraph Company.
Any trademarks mentioned in this manual are acknowledged to be the property of
the trademark owners.
CE Notice
The CE symbol on your Micro T1 CSU/DSU indicates that it is in compliance with
the Electromagnetic Compatibility (EMC) directive and the Low Voltage Directive
(LVD) of the Union European (EU).
WARNING
This device is not intended to be connected to the public telephone
network.

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MICRO T1 CSU/DSU
FEDERAL COMMUNICATIONS COMMISSION
AND
CANADIAN DEPARTMENT OF COMMUNICATIONS
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 J 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 the Canadian Department of
Communications.
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 le ministère des Communications du Canada.

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NOM STATEMENT
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.

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MICRO T1 CSU/DSU
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.

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FCC REQUIREMENTS
FCC REQUIREMENTS FOR
TELEPHONE-LINE EQUIPMENT
1. If you have problems with your telephone equipment after installing this
device, disconnect this device from the line to see if it is causing the
problem If it is, contact your supplier or an authorized agent.
2. The telephone company may make changes in its technical operations
and procedures. If any such changes affect the compatibility or use of
this device, the telephone company is required to give adequate notice
of the changes.
3. If the telephone company requests information on what equipment is
connected to their lines, inform them of:
a. The telephone number that this unit is connected to.
b. The ringer equivalence number.
c. The USOC jack required: RJ-11C.
d. The FCC registration number.
Items (b) and (d) can be found on the unit’s FCC label. The ringer
equivalence number (REN) is used to determine how many devices can
be connected to your telephone line. In most areas, the sum of the RENs
of all devices on any one line should not exceed five (5.0). If too many
devices are attached, they may not ring properly.
4. In the event of an equipment malfunction, all repairs should be
performed by your supplier or an authorized agent. It is the
responsibility of users requiring service to report the need for service to
the supplier or to an authorized agent.

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MICRO T1 CSU/DSU
CERTIFICATION NOTICE FOR
EQUIPMENT USED IN CANADA
The Canadian Department of Communications label identifies certified
equipment. This certification means that the equipment meets certain
telecommunications-network protective, operation, and safety
requirements. The Department does not guarantee the equipment will
operate to the user’s satisfaction.
Before installing this equipment, users should ensure that it is permissible
to be connected to the facilities of the local telecommunications company.
The equipment must also be installed using an acceptable method of
connection. In some cases, the company’s inside wiring associated with a
single-line individual service may be extended by means of a certified
connector assembly (extension cord). The customer should be aware that
compliance with the above conditions may not prevent degradation of
service in some situations.
Repairs to certified equipment should be made by an authorized
Canadian maintenance facility—in this case, your supplier. Any repairs or
alterations made by the user to this equipment, or equipment malfunctions,
may give the telecommunications company cause to request the user to
disconnect the equipment.
Users should ensure for their own protection that the electrical ground
connections of the power utility, telephone lines, and internal metallic water
pipe system, if present, are connected together. This precaution may be
particularly important in rural areas.
CAUTION:
Users should not attempt to make such connections themselves, but
should contact the appropriate electric inspection authority, or
electrician, as appropriate.
The LOAD NUMBER (LN) assigned to each terminal device denotes the
percentage of the total load to be connected to a telephone loop which is
used by the device, to prevent overloading. The termination on a loop may
consist of any combination of devices, subject only to the requirement that
the total of the load numbers of all the devices does not exceed 100.

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CONTENTS
Contents
Chapter Page
1. Specifications ........................................................................................................8
2. Introduction ..........................................................................................................9
2.1 Description ..................................................................................................9
2.2 Features ........................................................................................................9
2.3 Supported Applications ..............................................................................9
2.3.1 As an Interface Between the Telco and CPE ................................10
2.3.2 As a High-Speed Short-Range Modem ..........................................10
3. Configuration ......................................................................................................11
4. Installation............................................................................................................18
4.1 DTE Interface Connection........................................................................18
4.2 Network Interface Connection ................................................................18
4.3 Power Connection ....................................................................................18
5. Operation ............................................................................................................19
5.1 LED Descriptions ......................................................................................19
5.2 Central Office Loops ................................................................................20
Appendix A: Cable Recommendations ..................................................................22
Appendix B: Pin Assignments ..................................................................................23
Appendix C: Power-Supply Interface ......................................................................24

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MICRO T1 CSU/DSU
1. Specifications
WAN Speed — 1.544 Mbps
WAN Connection — RJ-48C
Nominal Impedance — 100 ohms
DTE Interface — Integral V.35, M/34 male
Line Coding — AMI/B8ZS
Line Framing — D4/ESF
Receive LBO — Automatic
Transmit LBO — Selectable: 0, 7.5, 15, or 22.5 dB
Clock Options — Internal, external, and network clock
Diagnostics — Responds to CO-initiated D4 loop-up and loop-
down codes, ESF line loop and payload loop
FDL messages, universal loopback de-activate
message
Standards — AT&T®TR62411, ANSI T1.403, TR54016
Power Supply — 120 VAC, 60 Hz to 5 VDC 300-mA wallmount
transformer (for DTE power options, see
Appendix C)
Size — 0.8"H x 2.1"W x 4.5"D (2 x 5.3 x 11.4 cm)

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CHAPTER 2: Introduction
2. Introduction
2.1 Description
The Micro T1 CSU/DSU supports a single T1 or Fractional T1 connection at data
rates of 1.544 Mbps (unstructured), n × 64, and n × 56. Plug the Micro T1
CSU/DSU directly into the WAN port of a switch, router, or multiplexor.
The Micro T1 CSU/DSU is easily configurable using two PC-board-mounted DIP
switches. Use the DIP switches to set D4 or ESF framing modes, AMI or B8ZS line
coding, clocking modes, T1 starting channel, Line Build Out, and data rate.
Connecting directly to the V.35 interface, the ultra-compact Micro T1 CSU/DSU
attaches without using additional cables. Twisted-pair line connections are made
through a modular RJ-48 female jack on the rear of the unit.
Seven easy-to-read LED indicators monitor data, network, and test signals.
2.2 Features
• Operates over 4-wire T1 (DS1) circuits.
• Supports unstructured rates at 1.544 Mbps.
• Supports common framed n × 56/64 rates up to 1.536 mbps.
• Seven easy-to-read LEDs monitor data and diagnostics.
• Internal or external network clocking.
• Also works as a high-speed point-to-point modem.
• Compact size; plugs directly into a router, switch, or other DTE.
2.3 Supported Applications
The Micro T1 CSU/DSU supplies the interface between the telephone-company
and customer-premises equipment (such as a router). The Micro T1 CSU/DSU
can also be used as a high-speed short-haul modem for campus applications.