Black Box ME0002A-V35, ME0002A-X21 User Manual

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]

DECEMBER 2001

ME0002A-V35
ME0002A-X21

IDSL Line Driver w/V.35

IDSL Line Driver w/X.21

1

FCC AND RFI STATEMENTS/CE NOTICE

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.

EUROPEAN UNION DECLARATION OF CONFORMITY

This equipment complies with the requirements of the European EMC Directive
89/336/EEC.

2

IDSL LINE DRIVER W/V.35 OR X.21

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

IDSL LINE DRIVER W/V.35 OR X.21

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 SNMP Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3. Configuring the Hardware DIP Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.1 Configuring DIP-Switch S1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1.1 Switches S1-1 and S1-2: Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1.2 Switch S1-3: Data Set Ready During Line Loopback Test . . . . . . . . 12

3.1.3 Switch S1-4: Must Be Set to the ON Position (Reserved) . . . . . . . . 12

3.1.4 Switch S1-5: Asynchronous/Sync Operation . . . . . . . . . . . . . . . . . . 12

3.1.5 Switches S1-6 and S1-7: System Clock Mode. . . . . . . . . . . . . . . . . . . 13

3.1.6 Switch S1-8: Response to RDL Request. . . . . . . . . . . . . . . . . . . . . . . 13

3.2 Configuring DIP-Switch S2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2.1 Switch S2-1: 19.2 kbps Synchronous Rate Enable . . . . . . . . . . . . . . 14

3.2.2 Switch S2-2: Front-Panel Switch Disable . . . . . . . . . . . . . . . . . . . . . . 15

3.2.3 Switch S2-3: Response to Local Line Loop Requests from DTE . . . 15

3.2.4 Switches S2-4 and S2-5: Not Assigned . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2.5 Switch S2-6: Response to RDL Requests from DTE . . . . . . . . . . . . . 16

3.2.6 Switch S2-7: Compatibility Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2.7 Switch S2-8: Not Assigned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.1 Connecting the Twisted-Pair Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.2 Connecting the IDSL Line Driver V.35 Serial Interface. . . . . . . . . . . . . . 18

4.2.1 Connecting the IDSL Line Driver V.35 to a DTE Device . . . . . . . . 18

4.2.2 Connecting the IDSL Line Driver V.35 to a DCE Device . . . . . . . . 19

4.3 Connecting the IDSL Line Driver X.21 Serial Interface . . . . . . . . . . . . . 19

4.3.1 Connecting the IDSL Line Driver X.21 to a DCE or DTE Device . 19

4.3.2 Opening the Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.4 Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6

IDSL LINE DRIVER W/V.35 OR X.21

Contents (continued)

Chapter Page

5. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.1 Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.2 LED Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.3 Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.3.1 Local Line Loopback (LLB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.3.2 Remote Digital Loopback (RDL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.4 Using the V.52 (BER) Test-Pattern Generator . . . . . . . . . . . . . . . . . . . . . 26

Appendix A. V.35 Interface Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Appendix B. X.21 Interface Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7

CHAPTER 1: Specifications

1. Specifications

Transmission Format: Synchronous or asynchronous

Transmission Line: Single unconditioned twisted pair

Clocking: Internal, external, or receive loopback

Distance:

• 10.1 miles (16.3 km) on 19-AWG (0.9-mm) wire

• 7.2 miles (11.6 km) on 22-AWG (0.64-mm) wire

• 5 miles (8 km) on 24-AWG (0.5-mm) wire

• 3.4 miles (5.5 km) on 26-AWG (0.4-mm) wire

Data Rates: Synchronous: 19.2, 32, 56, 64, and 128 kbps; Asynchronous: 0 to

38.4 kbps

Diagnostics: V.52-compliant bit error rate pattern (511/511E pattern) generator
and detector with error injection mode; Local Line Loopback and Remote Digital
Loopback, activated by front-panel switch or via serial interface

Indicators: LEDs: TD, RD, DSL Link, NS (no signal), ER (error), and TM (test
mode)

Line Interface: Transformer-coupled 1500-VAC isolation

Connectors: ME0002A-V35 (1) RJ-45, (1) M/34 female; ME0002A-X21: (1) RJ-45,

(1) DB15 female

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

Humidity: 5 to 95%, noncondensing

Power: 100 to 240 VAC, 50 to 60 Hz (universal input option), 5 watts

Size: 1.6"H x 4.1"W x 6"D (4.1 x 10.4 x 15.2 cm)

Weight: 2 lb. (0.9 kg)

8

IDSL LINE DRIVER W/V.35 OR X.21

2. Introduction

2.1 Description

The IDSL Line Driver w/V.35 or X.21 is a high-speed, AC-powered short-range
modem that is able to operate synchronously or asynchronously—full duplex—
over a single twisted pair. Supporting data rates to 128 kbps (synchronous) or

38.4 kbps (asynchronous), the IDSL Line Driver is capable of point-to-point
distances up to 5 miles (8 km) using 24-AWG wire.

The Line Driver supports internal, external, or receive loopback clocking in
synchronous mode. Data rates and asynchronous data format may be configured
locally using DIP switches.

ME0002A-V35 provides a V.35 interface on an M/34 female connector.
ME0002A-X21 provides an X.21 interface on a DB15 female connector.

Line connection is via an RJ-45 jack. Standard versions of the Line Driver are
powered by a 100- to 240-VAC universal power supply.

2.2 Features

• Synchronous data rates: 19.2, 32, 56, 64, and 128 kbps.

• Asynchronous data rates: 0 to 38.4 kbps.

• Full-duplex operation over a single twisted pair (2-wires).

• Point-to-point distances up to 5 miles (all data rates) on 24-AWG twisted pair.

• Remote digital loopback, local line loopback diagnostic modes.

• Multi-rate symmetric DSL.

• V.35 and X.21 interfaces.

• Interoperable with models ME0001C-V35, ME0001C-X21, and ME0009A-IDSL.

• SNMP manageable with ME0001C-V35 or ME0001C-X21 and RM261C-SNMP
as SNMP agent rack card.

• Universal power options.

• Front-panel status indicators.

9

CHAPTER 2: Introduction

• Small, convenient desktop unit.

• CE marked.

2.3 SNMP Management

The IDSL Line Driver (ME0002A-V35 or ME0002A-X21) is SNMP manageable
when it is connected to a rackmounted model ME0001C. SNMP management is
enabled through a RM261C-SNMP rack management card located in the Managed
Micro Rack (part number RM260).

Figure 2-1. Typical application.

HTTP/HTML M

ANAGEMENT

The Managed Micro Rack SNMP/HTTP Card (RM261C-SNMP) maintains HTML
pages that can be viewed through a Web browser. You can display remote statistics
and configure IDSL Line Driver parameters simply by entering the SNMP Card’s
IP address into the browser

Management Station

Managed Micro Rack (RM260)

with SNMP/HTTP Card

(RM261C-SNMP)

IDSL Line Driver

(ME0002A)

IDSL Line Driver

(ME0002A)

10BASE-T

connection to

IDSL Rack Card

(ME0001C)

2B1Q connections to

remote IDSL Line Drivers

(ME0002A)

10

IDSL LINE DRIVER W/V.35 OR X.21

3. Configuring the Hardware DIP
Switches

The IDSL Line Driver w/V.35 or X.21 is equipped with two sets of eight DIP
switches. This chapter describes switch locations and explains all possible
configurations.

Using a small flat-tip screwdriver, remove the protective cover located on the
underside of the IDSL Line Driver (see Figure 3-1).

Figure 3-1. Removing the cover to access DIP-switches S1 and S2.

Figure 3-2 shows the orientation of the DIP switches in the ON and OFF positions.

Figure 3-2. DIP-switches S1 and S2.

Switch toggle

Push toggle up for

ON position

Push toggle down

for OFF position

11

CHAPTER 3: Configuring the Hardware DIP Switches

3.1 Configuring DIP-Switch S1

DIP-switch S1 is where you configure the data rate, asynchronous or synchronous
data format, transmit clock source, and response to RDL request. Table 3-1
summarizes default positions of DIP-switches S1-1 through S1-8. Detailed
descriptions of each switch follow the table.

Table 3-1. S1 summary.

Position Function Factory Default

S1-1 Data Rate On

S1-2 Data Rate Off

S1-3 DSR during Local Line Loop On DSR On

S1-4 Reserved On

S1-5 Async/Sync Data Format Off

S1-6 TX Clock Source On

S1-7 TX Clock Source On

S1-8 Response to RDL Request On Enable

NOTE

When setting the IDSL Line Driver for SNMP management, the DTE rate
switches (S1-1, S1-2, and S2-1) must also be set to the ON position.

3.1.1 S

WITCHES

S1-1

AND

S1-2: D

ATARATE

Use Switches S1-1 and S1-2 to configure the asynchronous or synchronous data
rate of the IDSL Line Driver. Each setting represents one synchronous data rate
and one asynchronous data rate.

Table 3-2. Data rate switches.

S1-1 S1-2 Sync Data Rate Async Data Rate

On On 32 kbps Reserved

Off On 56 kbps Reserved

On Off 64 kbps Reserved

Off Off 128 kbps 0 to 38.4 kbps

Off Off 19.2 kbps Reserved

} 64 kbps Sync

} Internal Clock

12

IDSL LINE DRIVER W/V.35 OR X.21

NOTE

The IDSL Line Driver can also operate at the 19.2 kbps synchronous
rate. To operate at 19.2 synchronous, set Switches S1-1 and S1-2 both
to the OFF position and Switch S2-1 to the ON position (see Section

3.2.1 for a description of Switch S2-1).

3.1.2 S

WITCH

S1-3: D

ATASETREADYDURINGLINELOOPBACKTEST

Use Switch S1-3 to control the behavior of the DSR signal at the EIA interface
during the line loopback test.

Table 3-3. Data Set Ready switch setting.

S-3 Setting

On DSR is on during local line loop

Off DSR is off during local line loop

3.1.3 S

WITCH

S1-4: M

USTBESET TO THE

ON P

OSITION(RESERVED

)

Table 3-4. Switch S1-4 setting.

S1-4 Setting

On Reserved

3.1.4 S

WITCH

S1-5: A

SYNCHRONOUS/SYNCOPERATION

Use Switch S1-5 to configure the IDSL Line Driver for async/sync operation.
Switch S1-5 must be set in the Off position. There is no other valid setting.

Table 3-5. Async/sync operation.

S1-5 Setting

Off Async/Sync

13

CHAPTER 3: Configuring the Hardware DIP Switches

3.1.5 S

WITCHES

S1-6

AND

S1-7: S

YSTEMCLOCKMODE

Use Switches S1-6 and S1-7 to configure the IDSL Line Driver for internal,
external, or receive recover clock mode.

Table 3-6. System clock mode.

S1-6 S1-7 Clock Mode Description

On On Internal System clock generated internally

Off On External (DTE) System clock derived from terminal

interface

On Off Receive Recover System clock derived from the

received line signal

Off Off Hardware Reset

IMPORTANT!

A pair of IDSL line drivers communicate synchronously across the
twisted-pair line connection. Therefore, you must set these switches
regardless of whether your application is async or sync. For X.21 or
async applications, configure one unit for internal clock mode and the
other unit for receive recover clock mode.

3.1.6 S

WITCH

S1-8: R

ESPONSE TO

RDL R

EQUEST

Use Switch S1-8 to allow the IDSL Line Driver to enter the Remote Digital
Loopback diagnostic test when requested to do so by the far end Line Driver. For
example, when switch S1-8 is set to “ON,” it will enter RDL mode (see

Section 5.3.2) when requested to do so by the remote Line Driver.

Table 3-7. Remote digital loopback test.

S1-8 Setting

On Response to RDL Request Enabled

Off Response to RDL Request Disabled

14

IDSL LINE DRIVER W/V.35 OR X.21

3.2 Configuring DIP-Switch S2

Use the eight DIP switches in Switch S2 to enable 19.2 kbps synchronous
operation, set the loopback modes, and set the speed of the control port. The
following table summarizes default positions of DIP-switch S2. Detailed
descriptions of each switch follow the table.

Table 3-8. S2 summary.

Position Function Factory Default

S2-1 19.2 kbps enable On

S2-2 Front-panel switch Off

S2-3 Response to LAL from DTE Off Disabled

S2-4 Not assigned Off

S2-5 Not assigned Off

S2-6 Response to RDL from DTE On Enabled

S2-7 Compatibility mode Off

S2-8 Not assigned Off

3.2.1 S

WITCHES

S2-1: 19.2

KBPSSYNCHRONOUSRATEENABLE

Use Switch S2-1 to allow the IDSL Line Driver to operate at the 19.2 kbps
synchronous data rate.

Table 3-9. Sync rate enable.

S2-1 Activation Description

Off Disabled Synchronous data rate is 32 to

128 kbps as defined by switches S1-1

and S1-2

On Enabled IDSL Line Driver operates at

synchronous 19.2 kbps data rate*

*NOTE

To operate at 19.2 kbps, Set Switches S1-1 and S1-2 to the OFF position
(see Section 3.1.1).

15

CHAPTER 3: Configuring the Hardware DIP Switches

3.2.2 S

WITCH

S2-2: F

RONT-PANELSWITCHDISABLE

Use Switch S2-2 to enable or disable the front-panel toggle switches.

Table 3-10. Front-panel toggle switches.

S2-2 Setting

On Disable the front-panel switches

Off Enable the front-panel switches

3.2.3 S

WITCH

S2-3: R

ESPONSE TOLOCALLINELOOPREQUESTS FROM

DTE

Use Switch S2-3 to enable Local Line Loopback from the local DTE interface (see

Section 5.3.1).

Table 3-11. Local line loopback.

S2-3 Activation Description

Off Disabled Ignore Line Loopback request from DTE

interface

On Enabled Respond to Line Loopback request from

DTE interface

16

IDSL LINE DRIVER W/V.35 OR X.21

3.2.4 S

WITCHES

S2-4

AND

S2-5: NOTA

SSIGNED

3.2.5 S

WITCH

S2-6: R

ESPONSE TO

RDL R

EQUESTS FROM

DTE

Use Switch S2-6 to determine the IDSL Line Driver response to RDL requests from
the local DTE. In the enabled setting, the Line Driver responds to RDL requests
from the local DTE by sending an RDL loop request to the remote Line Driver
(see Section 5.3.2).

Table 3-12. Remote digital loopback.

S2-6 Activation Description

Off Disabled Ignore Remote Digital Loopback request

from DTE interface

On Enabled Respond to Remote Digital Loopback

request from DTE interface

3.2.6 S

WITCH

S2-7: C

OMPATIBILITYMODE

In some instances, you may need to connect an IDSL Line Driver to a third-party
IDSL modem. By enabling S2-7, the Line Driver will negotiate and link up to a non
Black Box IDSL modem. When using two Black Box units, please set S2-7 to the
default position.

Table 3-13. Compatibility mode.

S2-7 Activation Setting

Off Disabled Default position

On Enabled Compatibility mode

3.2.7 S

WITCH

S2-8: NOTA

SSIGNED

17

CHAPTER 4: Installation

4. Installation

Once the IDSL Line Driver is properly configured, it is ready to connect to the
twisted-pair interface, to the serial port, and to the power source. This section tells
you how to make these connections.

Figure 4-1. Rear view.

4.1 Connecting the Twisted-Pair Interface

The IDSL Line Driver supports communication between two DTE devices at
distances to 5 miles (8 km) over 24-AWG (0.5-mm) twisted-pair wire. Two things
are essential:

1. These units work in pairs. Both units at the end of the twisted-pair DSL span
must be set for the same DTE rate.

2. To function properly, the IDSL Line Driver needs one twisted pair of metallic
wire. This twisted pair must be unconditioned, dry, metallic wire, between 19
(0.9 mm) and 26 AWG (0.4 mm); the higher-number gauges will limit
distance. Standard dial-up telephone circuits, or leased circuits that run
through signal equalization equipment, or standard, flat modular telephone
type cable, are not acceptable.

The RJ-45 connector on the Line Driver’s twisted-pair interface is polarity
insensitive and is wired for a two-wire interface. The signal/pin relationships are
shown in Figure 4-2.

V.35 connector

Line interface

Power input

connector

18

IDSL LINE DRIVER W/V.35 OR X.21

Figure 4-2. RJ-45 twisted-pair interface.

4.2 Connecting the IDSL Line Driver V.35 Serial Interface

The IDSL Line Driver supports V.35 serial port connections. This section describes
how to connect the serial ports to your V.35 equipment.

4.2.1 C

ONNECTING THE

IDSL L

INEDRIVER

V.35

TO A

DTE D

EVICE

The Line Driver provides a V.35 DCE (Data Circuit Terminating Equipment)
interface on an M/34 female connector. As a DCE, this interface is designed to
connect to DTE equipment, such as a router. When connecting the V.35 interface
of the Line Driver to your DTE device, use a V.35 straight-through cable (see
Figure 4-3). Appendix A describes pin assignments and signal sources for the Line
Driver’s V.35 interface. When purchasing or constructing an interface cable, please
use Appendix A as a guide.

Figure 4-3. Connecting the Line Driver to a V.35 serial DTE.

- - - - - - - - - - - - - - - - - 1 Not connected

- - - - - - - - - - - - - - - - - 2 Not connected

- - - - - - - - - - - - - - - - - 3 Not connected

- - - - - - - - - - - - - - - - - 4 (2-wire Tip)

- - - - - - - - - - - - - - - - - 5 (2-wire Ring)

- - - - - - - - - - - - - - - - - 6 Not connected

- - - - - - - - - - - - - - - - - 7 Not connected

- - - - - - - - - - - - - - - - - 8 Not connected

IDSL Line Driver

(ME0002A-V35)

IDSL Line Driver

(ME0002A-V35)

DSL span

V.35 router (DTE)

Straight-through

M/34 cable

19

CHAPTER 4: Installation

4.2.2 C

ONNECTING THE

IDSL L

INEDRIVER

V.35

TO A

DCE D

EVICE

The Line Driver (ME0002A-V35) provides a V.35 DCE (Data Circuit Terminating
Equipment) interface on an M/34 female connector. As a DCE, this interface is
designed to connect to DTE equipment, such as a router. However, tail-circuit
applications require connection to another piece of DCE equipment, such as a
multiplexor. When connecting the V.35 interface of the Line Driver to your DCE
device, use a V.35 null-modem cable. Some applications may also require the
installation of a V.35 tail-circuit buffer to account for small differences in clock
frequency between the Line Driver and the V.35 DCE (multiplexor).

Figure 4-4. Connecting the Line Driver to a V.35 serial DCE.

4.3 Connecting the IDSL Line Driver X.21 Serial Interface

The Line Driver (ME0002A-X21) supports X.21 serial port connections. This
section describes how to connect the serial ports to your X.21 equipment.

4.3.1 C

ONNECTING THE

IDSL L

INEDRIVER

X.21

TO A

DCE ORDTE D

EVICE

The Line Driver provides an X.21 interface on a DB15 female connector. The X.21
interface default configuration is DCE (Data Circuit Terminating Equipment) for
connection to DTE (Data Terminal Equipment) such as a router. However, the
X.21 interface on the Line Driver may be configured as DTE (Data Terminal
Equipment) for connection to DCE such as a modem or multiplexor. When
connecting the X.21 interface of the Line Driver to your DTE device, use a X.21
straight-through cable (see Figure 4-5).

IDSL Line Driver

(ME0002A-V35)

IDSL Line Driver

(ME0002A-V35)

DSL span

V.35 multiplexor (DCE)

20

IDSL LINE DRIVER W/V.35 OR X.21

Figure 4-5. Connecting the Line Driver to an X.21 DTE or DCE.

To change the DCE/DTE orientation from the default position (DCE), you must
open the case Line Driver’s case.

4.3.2 O

PENING THECASE

To open the Line Driver’s case, insert a flat-head screwdriver into an open slot on
both sides of the case, as in Figure 4-6. Twist the screwdriver head slightly, and the
top half of the case will separate from the rest of the case.

Figure 4-6. Opening the case with a small screwdriver.

IDSL Line Driver

(ME0002A-X21)

IDSL Line Driver

(ME0002A-X21)

DSL span

Router (DTE) or

Multiplexor (DCE)

Straight-through

DB15 cable

21

CHAPTER 4: Installation

The DCE/DTE strap is located on the top side of the Line Driver PC board (see
Figure 4-7). The arrows on the top of the strap indicate the configuration of the
X.21 port (for example, if the DCE arrows are pointing toward the DB15
connector, the X.21 port is wired as a DCE). Change the DCE/DTE orientation by
pulling the strap out of its socket, rotating it 180º, then plugging the strap back
into the socket. You will see that the DCE/DTE arrows now point in the opposite
directions, showing the new configuration of the X.21 port. To close the case, fit
the two halves together snugly and snap them back in place.

Figure 4-7. Setting the DCE/DTE strap.

4.4 Connecting Power

The Line Driver uses a 5-VDC, 2-A 100- to 240-VAC universal input power supply
(center pin is +5V). The power supply has a male IEC 320 power entry connector.
This power supply connects to the Line Driver via a barrel jack on the rear panel.

The Line Driver powers up as soon as it is plugged into an AC outlet—there is no
power switch. The universal AC supply is equipped with a male IEC 320 connector.

DB15 (X.21)

connector

In this example, the DCE/DTE strap is configured
for DTE because the “DTE” label on the strap is
pointed toward the DB15 connector.

22

IDSL LINE DRIVER W/V.35 OR X.21

5. Operation

Once the IDSL Line Driver is properly configured and installed, it should operate
transparently. This chapter describes power-up, reading the LED status indicators,
and using the built-in loopback test modes.

5.1 Power-Up

To apply power to the IDSL Line Driver, first be sure that you have read
Section 4.4, and that the unit is connected to the appropriate power source. Then
power-up the unit.

5.2 LED Status Indicators

The IDSL Line Driver features six front-panel LEDs that monitor power, the DTE
signals, network connection, and test modes. Figure 5-1 shows the location of each
LED. Following Figure 5-1 is a description of each LED’s function. See also
Table 5-1.

Figure 5-1. Front panel.

23

CHAPTER 5: Operation

Table 5-1. LED descriptions.

LED Description

DSL Link (Active Green) Solid green (On) indicates that the end-to-

end DSL Framer Link is up, signifying that the link across

the DSL span is active. The DSL Link LED is Off when the

link is down.

TD and RD Glows yellow to indicate an idle condition of Binary “1”

data on the respective terminal interface signals. Green

indicates Binary “0” data.

NS (No Signal) glows red to indicate that the local Line Driver

is not connected with the remote Line Driver.

ER Blinks ON/OFF after a 511/511E test has timed out. See

Section 5.4 (Test-Pattern Generator) for more

information.

TM Glows yellow to indicate test mode.

5.3 Test Modes

The IDSL Line Driver offers two proprietary loopback test modes (plus a built-in
V.52 BER test-pattern generator) to evaluate the condition of the modems and the
communication link. These tests can be activated via the interface or physically
from the front panel.

5.3.1 L

OCALLINELOOPBACK

(LLB)

The Local Line Loopback (LLB) test checks the operation of the local IDSL Line
Driver, and is performed separately on each unit. Any data sent to the local Line
Driver in this test mode will be echoed (returned) back to the user device. For
example, characters typed on the keyboard of a terminal will appear on the
terminal screen.

24

IDSL LINE DRIVER W/V.35 OR X.21

Figure 5-2. Local line loopback.

To perform an LLB test, follow these steps:

1. Activate LLB. This may be done in one of two ways:

Move the front-panel toggle switch up to “Local.”

Raise the LLB signal on the interface.

Once LLB is activated, the IDSL Line Driver transmitter output is connected
to its own receiver. Data is also looped back to the line. The TM LED should
be lit.

2. Verify that the data terminal equipment is operating properly and can be
used for a test.

3. Perform a V.52 BER (bit error rate) test as described in Section 5.4. If the
BER test equipment indicates no faults, but the data terminal indicates a fault,
follow the manufacturer’s checkout procedures for the data terminal. Also,
check the interface cable between the terminal and the Line Driver.

5.3.2 R

EMOTEDIGITALLOOPBACK

(RDL)

The Remote Digital Loopback (RDL) test checks the performance of both the
local and remote Line Drivers, and the communication link between them. Any
characters sent to the remote Line Driver in this test mode will be returned back to
the originating device. For example, characters typed on the keyboard of the local
terminal will appear on the local terminal screen after having been passed to the
remote Line Driver and looped back.

LLB

initiated

25

CHAPTER 5: Operation

Figure 5-3. Remote digital loop.

IMPORTANT

Do not send a 511 test pattern from the test equipment when you
connect external test equipment to the Line Driver.

To perform an RDL test, follow these steps:

1. Activate RDL. This may be done in two ways:

Move the front-panel toggle switch Down to “Remote.”

Raise the RDL signal on the interface.

2. Perform a V.52 BER test as described in Section 5.4. If the BER test
equipment indicates a fault and the Local Line Loopback test was successful
for both Line Drivers, you may have a problem with the twisted-pair line
between the modems. You should then check the twisted-pair line for proper
connections and continuity.

Local IDSL Line

Driver (ME0002A)

RDL initiated

Remote IDSL Line

Driver (ME0002A)

26

IDSL LINE DRIVER W/V.35 OR X.21

5.4 Using the V.52 (BER) Test-Pattern Generator

To use the V.52 BER tests in conjunction with the Remote Digital Loopback tests
(or with Local Line Loopback tests), do the following:

1. Locate the 511/511E toggle switch on the Line Driver’s front panel and set
the toggle to the down position. This activates the V.52 BER test mode and
transmits a 511 test pattern into the loop. If any errors are present, the local
modem’s red ER LED will blink continuously.

2. If the above test indicates that no errors are present, move the V.52 toggle
switch to the up position, activating the 511E test with errors present. If the
test is working properly, the local modem’s red ER LED will blink. A
successful 511E test will confirm that the link is in place, and that the Line
Driver’s built-in 511 generator and detector are working properly.

27

APPENDIX A: V.35 Interface Pin Assignments

Appendix A. V.35 Interface Pin

Assignments

Listed below are the V.35 interface pin assignments (M/34 female connector, DCE
orientation).

Pin # Signal

B SGND (Signal Ground)

C RTS (Request to Send) (DTE Source)

D CTS (Clear to Send) (DCE Source)

E DSR (Data Set Ready) (DCE Source)

F CD (Carrier Detect) (DCE Source)

H DTR (Data Terminal Ready) (DTE Source)

L LLB (Local Line Loop) (DTE Source)

M TM (Test Mode) (DTE Source)

N RDL (Remote Digital Loop) (DTE Source)

P TD (Transmit Data) (DTE Source)

R RD (Receive Data) (DCE Source)

S TD/ (Transmit Data-B) (DTE Source)

T RD/ (Receive Data-B) (DCE Source)

U XTC (External Transmit Clock) (DTE Source)

V RC (Receiver Clock) (DCE Source)

W XTC/ (External Transmit Clock) (DTE Source)

X RC/ (Receiver Clock) (DCE Source)

Y TC (Transmitter Clock-A) (DCE Source)

AA TC/ (Transmit Clock-B) (DCE Source)

28

IDSL LINE DRIVER W/V.35 OR X.21

Appendix B. X.21 Interface Pin

Assignments

Listed below are the X.21 interface pin assignments (DB15 female connector,
DTE/DCE orientation).

Pin # Signal

1 Frame Ground

2 T (Transmit Data-A) (DTE Source)

3 C (Control-A) (DTE Source)

4 R (Receive Data-A) (DCE Source)

5 I (Indication-A) (DCE Source)

6 S (Signal Element Timing-A) (DCE Source)

7 BT (Byte Timing-A) (DCE Source)

8 SGND (Signal Ground)

9 T/ (Transmit Data-B) (DTE Source)

10 C/ (Control-B) (DTE Source)

11 R/ (Receive Data-B) (DCE Source)

12 I/ (Indication-B) (DCE Source)

13 S/ (Signal Element Timing-B) (DCE Source)

14 BT/ (Byte Timing-B) (DCE Source)

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]

© Copyright 2001. Black Box Corporation. All rights reserved.