Black Box MT210A User Manual

JANUARY 1999

MT210A

Multiport 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: [e-mail]

Test Mode

Error

No Signal

DTR

DSR

DCD

CTS

RTS

RD

TD

P

Line Rate

ON I

DTE Status

Quick-Connect Interface Module

64 kbps

56 kbps

38.4 kbps

19.2 kbps

er

9.2 kbps

4.8 kbps

2.4 kbps

ow

Status

Line

Local-

Normal­Remote-

Interface Port

Multiport CSU/DSU

Test Modes

-Errored

-Off

-Normal

Loop Pattern

Control Port

Line

OFF O

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MULTIPORT 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.

This equipment complies with the Electromagnetic Compatibility (EMC) directive
and the Low Voltage Directive (LVD) of the European Union (EU).

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MULTIPORT CSU/DSU

FCC REQUIREMENTS FOR

DIGITAL EQUIPMENT

1. This equipment complies with Part 68 of the FCC rules. The unit bears a
label that contains the FCC registration number. If requested, you must
provide this information to the telephone company.

2. This equipment contains an FCC-compliant modular jack. It is designed
to be connected to the digital telephone network or premises wiring
using compatible modular plugs and cabling that comply with the
requirments of FCC Part 68 rules.

3. In the unlikely event that this equipment causes harm to the telephone
network, the telephone company may temporarily disconnect your
service. The telephone company will try to warn you in advance of any
such disconnection, but if advance notice is not practical, it may
disconnect the service first and notify you as soon as possible afterwards.
If such a disconnnection is necessary, you will be advised of your right to
file a complaint with the FCC.

4. From time to time, the Telephone Company may make changes in its
facilities, equipment, or operations that could affect the operation of this
equipment. If this occurs, the Telephone Company is required to provide
you with advance notice so you can make the modifications necessary to
maintain uninterrupted service.

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MULTIPORT 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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MULTIPORT CSU/DSU

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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MULTIPORT 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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MULTIPORT CSU/DSU

TRADEMARKS

The trademarks mentioned in this manual are the sole property of their owners.

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MULTIPORT CSU/DSU

Contents

1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3. Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1 Configuring the Hardware DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1.1 DIP Switch Set S1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1.2 DIP Switch Set S2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1.3 DIP Switch Set S3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.2 Configuring the Software Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.2.1 Introduction to the Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.2.2 Configuring the Multiport CSU/DSU . . . . . . . . . . . . . . . . . . . . . . . . . 23

4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.1 Connecting the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.1.1 Changing the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.1.2 Connecting a DTE Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.1.3 Connecting a DCE Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.1.4 Configuring the X.21 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.2 Connecting the Twisted Pair Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.3 Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.1 Power-On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.2 LED Status Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.3 Loop (V.54 and Telco) Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.3.1 Operating Local Analog Loopback (LAL) . . . . . . . . . . . . . . . . . . . . . . 34

5.3.2 Operating Remote Digital Loopback (RDL) . . . . . . . . . . . . . . . . . . . . 35

5.3.3 Telco Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.4 Bit Error Rate (V.52) Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Appendix A: Interface Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Appendix B: Control Port Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Appendix C: Quick Reference for DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . 42

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MULTIPORT CSU/DSU

1. Specifications

Compatibility—AT&T 62310

DDS Line Interface—Externally accessible RJ-48 female

Transmission Format—Synchronous or asynchronous

Transmission Line—Two unconditioned twisted pair

Clock Options—Internal, external, receive loopback, and campus

Interfaces—Modules: RS-232 (DB25 female), RS-422/530 (DB25 female), V.35

(M/34 female), X.21 (DB15), G.703 (RJ-45), Ethernet Bridge

Speeds—Synchronous: 2.4, 4.8, 9.6, 19.2, 56, and 64 kbps; Asynchronous: 2.4,

4.8, 9.6, 19.2, 38.4, and 57.6 kbps

Diagnostics—V.54-compliant local and remote loopbacks; V.52-compliant 511

and 2047 BER tests

Indicators—Front-panel LEDs: DDS line rates (2.4, 4.8, 9.6, 19.2, 38.4, and 57.6

kbps), Power, TD, RD, RTS, CTS, DCD, DSR, DTR, No Signal, Test Mode,
Error Indication

Distance— -49 dBm receiver sensitivity or better

RTS/CTS Delay—0 ms/50 ms

Front-Panel Switches—Loopback indication and Bit Error Rate Test

Temperature Range—32 to 122 °F (0 to 50 °C)

Altitude—Up to 15,000 feet (4572 m)

Humidity—5 to 95% noncondensing

Surge Protection—600 W Power Dissipation

Lightning Protection—Gas Tube

Isolation—1500 V via isolation transformers

Approvals—FCC Part 68, FCC Part 15, Class A, CE marked per EMC Directive

89/336/EEC and Low Voltage Directive 73/23/EEC, UL and cUL safety
approvals

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MULTIPORT CSU/DSU

Power—Universal Input (UI): 100 to 253 VAC; Input: DC: 18 VDC to 72 VDC,

48 V nominal

Size—1.6"H x 7.3"W x 6.6"D (4.1 x 18.5 x 16.8 cm)

Weight—2 lb. (0.9 kg)

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MULTIPORT CSU/DSU

2. Introduction

2.1 Description

The Multiport CSU/DSU (part number MT210A) provides Digital Data Service
(DDS) access. It connects to your network devices via your choice of
interchangeable interface modules. With sync operation at up to 64 kbps or async
at up to 57.6 kbps, the CSU/DSU is versatile, reliable, and hassle-free.

The CSU/DSU complies with AT&T 62310 and supports DDS, Clear Channel
64, and other digital services available from major service providers. Configure the
CSU/DSU for the application using externally accessible hardware DIP switches or
via menu-driven software switches. After installation, easy-to-read front-panel LED
indicators monitor data and control signals. The CSU/DSU also offers convenient
V.52 BER and V.54-compliant loop diagnostics.

Replaceable modules come with a variety of interfaces. Select from the
following:

• RS-232 (DB25 female) (part number ME481C-232)

• RS-422/530 (DB25 female) (part number ME481C-422)

• V.35 (M/34 female) (part number ME481C-35)

• X.21 (DB15) (part number ME481C-X21)

• G.703 (RJ-45) (part number ME481C-G703)

• Ethernet Bridge (part number ME530A)

The CSU/DSU connects to the line side via an RJ-48 female jack. It receives
power from an included 100–253 VAC universal power supply.

For how to connect the modules to a DTE or DCE device, see Sections 4.1.2 and

4.1.3. For more information about a specific interface module, refer to the manual
supplied with that module.

2.2 Features

• Operates over 4-wire dedicated digital lines.

• Synchronous Data Rates: 2.4, 4.8, 9.6, 19.2, 56, and 64 kbps

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MULTIPORT CSU/DSU

• Asynchronous Data Rates: 2.4, 4.8, 9.6, 19.2, 38.4, and 57.6 kbps

• Field-replaceable DTE-DCE interface modules: V.24/RS-232, V.35,
RS-422/530, G.703, X.21, and Ethernet Bridge

• V.52 BER and V.54-compliant loop diagnostics

• 511 and 2047 Bit Error Rate Tests

• 24 easy-to-read LED indicators to monitor data signals

• Internal, external, received loopback, and campus clock modes

• AT&T 62310 compliant

• Can be used as a high-speed modem for private twisted-pair lines

• Made in the USA

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MULTIPORT CSU/DSU

3. Configuration

You can configure the Multiport CSU/DSU via hardware switches or a software
control port. This section describes all possible configurations.

3.1 Configuring the Hardware DIP Switches

The CSU/DSU has 24 DIP switches that you can configure for a wide variety of
applications. The 24 switches are grouped into three eight-switch sets. You can
access them externally from the underside of the CSU/DSU (see Figure 3-1).

Figure 3-1. Underside of the CSU/DSU, Showing the Location of the DIP

Switches.

The three sets of DIP switches on the underside of the CSU/DSU will be
referred to as S1, S2, and S3. Figure 3-2 shows the orientation of all DIP switches
with respect to “ON” and “OFF” positions.

Figure 3-2. Close-up of Configuration Switches (all three sets are identical

in appearance).

Front

Back

OFF ON

S1

S2

S3

ON

ON

12345678

OFF

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MULTIPORT CSU/DSU

3.1.1 DIP S

WITCHSET

S1

You can use the DIP switches on set S1 to configure the DTE rate, RTS/CTS delay,
anti-stream timer, data format, character length, and Extended Signalling Rate
(ESR). Default settings are shown in Table 3-1. All settings are shown in Table

C-1. Detailed descriptions for each switch in the set appear below and on pages
13–14.

Table 3-1. S1 Summary Table.

Position Function Factory Default

S1-1 DTE Rate Off DTE Rate equals

S1-2 DTE Rate Off Line Rate

S1-3 DTE Rate Off

S1-4 RTS/CTS Delay Off Normal

S1-5 Anti-Stream Timer Off Off

S1-6 Data Format Off Synchronous

S1-7 Character Length Off 10 Bits

S1-8 Extended Signal Rate Off Off

Switches S1-1, S1-2, and S1-3: Data Rate

Use switches S1-1, S1-2, and S1-3 to configure the DTE rate of the CSU/DSU. This
rate represents the synchronous or asynchronous rate at which the DTE must
connect to the CSU/DSU’s interface module.

Table 3-2. Settings for Switches S1-1, S1-2, and S1-3.

S1-1 S1-2 S1-3 DTE Rate

On On On 2.4 kbps

On On Off 4.8 kbps

On Off On 9.6 kbps

Off On Off 19.2 kbps

On On Off 38.4 kbps

Off On On DTE Rate=Line Rate*

*NOTE

To achieve 56 kbps or 64 kbps, use this switch combination.

}