Black Box ME0006A-V35 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: [email protected]
NOVEMBER 2001
ME0006A-V35
ME0006A-X21
2-Wire Short-Range DSL Line Driver
(HDSL with V.35)
(HDSL with X.21)

1
FCC AND IC 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
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH 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
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Connecting the Twisted-Pair Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Connecting the HDSL Line Driver’s V.35 Serial Interface . . . . . . . . . . . 15
4.2.1 Connecting the V.35 Line Driver to a DTE Device . . . . . . . . . . . . . . 15
4.2.2 Connecting the V.35 Line Driver to a DCE Device . . . . . . . . . . . . . . 15
4.3 Connecting the Line Driver’s X.21 Serial Interface . . . . . . . . . . . . . . . . . 16
4.3.1 Connecting the X.21 Line Driver to a DCE or DTE Device . . . . . . . 16
4.3.2 Opening the Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4 Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 LED Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3.2 Restart Procedure and Timeouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3.3 Loops and Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.3.4 Using the V.52 (BER) Test-Pattern Generator . . . . . . . . . . . . . . . . . . 27
Appendix A. V.35 Interface Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Appendix B. X.21 Interface Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix C. Transmission Distance Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)
1. Specifications
Clocking Modes: Internal, external, or receive recovered
DTE Rate: All 64-kbps increments from 64 to 1152 kbps
DTE Interface: ME0006A-V.35: DCE orientation; ME0006A-X.21: DCE or DTE
DTE Connector: ME0006A-V.35: M/34 female; ME0006A-X21: DB15 female
Diagnostics: V.52-compliant (511/511E) pattern generator and detector with error
injection mode controlled by a front-panel switch; local and remote loopback
controlled by either a front-panel switch or from the DTE interface
Indicators: LEDs: DSL Link (green active); TD (yellow/green) idle yellow; RD
(yellow/green) idle yellow; NS (red active); No signal DSL Link; ER (flashing red)
CRC error during normal operation, bit error during pattern-generation test; TM
(active yellow) Test Mode enabled
Configuration: Externally accessible DIP switches or SNMP managed through
ME0003C
Transmission Line: Single twisted pair
Line Coding: 2B1Q
Line Rates (DSL Line): 144, 272, 400, 528, 784, 1040, 1168 kbps
Line Interface: Transformer coupled, 1500-VAC isolation
Connection: RJ-45, 2-wire, polarity insensitive pins 4 and 5
Operating Temperature: 32 to 122°F (0 to 50°C)
Humidity: 5 to 95% noncondensing
Altitude: Up to 15,000 ft. (4572 m)
Power: External desktop transformer, 100 to 240 VAC, 50 to 60 Hz (universal
input), 10 W
Size: 1.6"H x 4.7"W x 6"D (4.1 x 11.9 x 15.2 cm)
Weight: 0.58 lb. (0.26 kg)

7
CHAPTER 2: Introduction
2. Introduction
2.1 Description
The 2-Wire Short-Range DSL Line Driver (HDSL) V.35 or X.21 provides
high-speed 2-wire connectivity to ISPs, PTTs, and corporations using HDSL (High
Bit-Rate Digital Subscriber Line) technology. Supporting multiple line rates from
144 kbps to 1.168 Mbps, the Line Driver provides megabyte speeds to leased line,
LAN-to-LAN interconnection, and WAN access networks over 3.6 miles/5.8 km
(1.054 Mbps on 24-AWG/0.5-mm wire).
The HDSL Line Driver V.35 (ME0006A-V35) provides a V.35 interface on an M/34
female connector. The HDSL Line Driver X.21 (ME0006A-X21) provides an X.21
interface on a DB15 female connector. Features include loopback diagnostics, and
inband SNMP/HTTP remote management capabilities through a DSL Line Driver
Rack Card (ME0003C) CO and externally accessible configuration switches. Both
versions of the Line Driver are compatible with the popular QuikConnect HDSL
Line Driver (ME0007A-HDSL) standalone and DSL Line Driver Rack Card
(ME0003C) as well as the HDSL Line Driver 10BASE-T (ME0006A-10BT).
As a symmetric DSL NTU, the HDSL Line Driver offers the same data rates in both
directions over a single pair of regular telephone lines using 2B1Q modulation.
Line connection is made by an RJ-45 jack. The Line Driver is powered by a 100- to
240-VAC universal power supply.
2.2 Features
• High bit-rate DSL.
• 2B1Q modulation.
• DTE rates up to 1.152 Mbps.
• V.35 and X.21 interfaces.
• Interoperable with ME0003C and ME0007A.
• SNMP Manageable via Managed Micro Rack SNMP/HTTP Card (RM261C-
SNMP) through ME0003C/CO.
• Universal power supply.
• Front-panel status indicators.
• Small, convenient desktop unit.
• CE marked.

8
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)
3. Configuration
The HDSL Line Driver is equipped with two sets of eight DIP switches. This
chapter describes switch locations and explains all possible configurations.
Configuring the Hardware DIP Switches
The 16 external switches are grouped into two eight-switch sets. They’re externally
accessible from the underside of the HDSL Line Driver (see Figure 3-1).
Figure 3-1. Underside of the HDSL Line Driver,
showing the location of the DIP switches.
The two sets of DIP switches on the underside of the HDSL Line Driver are called
S2 and S3. As Figure 3-2 shows, the orientation of all DIP switches is the same with
respect to ON and OFF positions.
Figure 3-2. Close-up of configuration switches
(all sets are identical in appearance).
ON OFF

9
CHAPTER 3: Configuration
DIP-S WITCH S2
The configuration switches on S2 allow you to specify the clocking mode and to
enable/disable local and remote loop requests from the V.35 DTE. Default settings
are shown in Table 3-1.
Table 3-1. S2 summary.
Position Function Factory Default
S2-1 Reserved Off
S2-2 Reserved Off
S2-3 Reserved Off
S2-4 Reserved Off
S2-5 Reserved Off
S2-6 Clock Mode On
S2-7 Clock Mode Off
S2-8 Enable loop from DTE Off Disabled
Switch S2-1, S2-2, S2-3, S2-4, and S2-5:
Reserved for factory use and must remain in the OFF position.
}Receive Recover

10
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)
Switches S2-6 and S2-7: Clock Mode
Use Switches S2-6 and S2-7 to configure the HDSL Line Driver for internal,
external, or receive recover clock mode.
Table 3-2. Clock mode.
CO/CP S2-6 S2-7 Clock Mode Description
Unit
CO On On Internal Transmit clock
generated internally
CO Off On External (DTE) Transmit clock
derived from terminal
interface
CP On Off Receive Transmit clock
Recover derived from the
received line
Off Off Reserved
Switch S2-8: Enable/Disable Loop Tests from DTE
Switch S2-8 may be used to allow the HDSL Line Driver to enter loopback
diagnostic tests (Local or Remote) when the V.35 DTE raises the appropriate loop
request pin (LLB: Pin L or RDL: Pin N). When Switch S2-8 is in the On position,
the HDSL Line Driver will enter local loopback or remote loopback at the request
of the DTE. When Switch S2-8 is in the Off position, the HDSL Line Driver ignores
DTE loop requests. In the Off position, loop requests may still be initiated by the
front-panel switch.
Table 3-3. Enable/disable loop tests.
S2-8 Setting
On DTE Loopback Request Enabled
Off DTE Loopback Request Disabled

11
CHAPTER 3: Configuration
DIP-S WITCH S3
Use the eight DIP Switches in Switch S3 to enable the DTE bit rate. Table 3-4
summarizes the default positions. Detailed descriptions of each switch follow the
table.
Table 3-4. S3 summary.
Position Function Factory Default
S3-1 DTE Rate On
S3-2 DTE Rate Off
S3-3 DTE Rate Off
S3-4 DTE Rate Off
S3-5 DTE Rate On
S3-6 DTE Rate On
S3-7 Reset Software Defaults On Normal Operation
S3-8 Transmit Data Sample Point On Normal Operation
Switches S3-1 through S3-6: DTE Bit Rate
Table 3-5. DTE bit rate.
S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 DTE Rate (kbps)
Off Off On On On On 64
On On Off On On On 128
Off On Off On On On 192
On Off Off On On On 256
Off Off Off On On On 320
On On On Off On On 384
Off On On Off On On 448
On Off On Off On On 512
Off Off On Off On On 576
On On Off Off On On 640
Off On Off Off On On 704
On Off Off Off On On 768
Off Off Off Off On On 832
On On On On Off On 896
}768 kbps

12
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)
Table 3-5 (continued). DTE bit rate.
S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 DTE Rate (kbps)
OffOnOnOnOffOn 960
On Off On On Off On 1024
Off Off On On Off On 1088
On On Off On Off On 1152
NOTE
The actual line rate of the Line Driver is determined by the selection of
the DTE rate. To see the line rate associated with various DTE rates,
refer to the distance charts in Appendix C.
Switch S3-7: Reset Software Defaults
Switch S3-7 allows you to reset the software-configured factory defaults. This will
only be needed when using the Managed Micro Rack SNMP/HTTP Card (part
number RM261C-SNMP) to SNMP manage your units. For more information,
please refer to the Managed Micro Rack SNMP/HTTP Card Users’ Manual.
Table 3-6. Reset software defaults.
S3-7 Setting
On Normal Operation
Off Reset

13
CHAPTER 3: Configuration
Switch S3-8: Transmit Data (TD) Sampling Point
Table 3-7. Transmit data sampling point.
S3-8 Setting Description
On Normal TD sampled on the falling edge of the
HDSL Line Driver Transmit Clock (TC)
Off Invert TD sampled on the rising edge of the
HDSL Line Driver Transmit Clock

14
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)
4. Installation
Once the HDSL 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 chapter tells
you how to make these connections.
4.1 Connecting the Twisted-Pair Interface
The HDSL 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 HDSL 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.
IMPORTANT!
The HDSL Line Driver has been optimized for performance at high bit
rates (DTE rates greater than 512 kbps). To ensure accurate
performance at these rates, please use twisted-pair line interface cable
that is at least 330 ft. (100.6 m) long.
The RJ-45 connector on the HDSL 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 4-1.
Figure 4-1. RJ-45 twisted-pair line interface.

15
CHAPTER 4: Installation
4.2 Connecting the HDSL Line Driver’s V.35 Serial Interface
The HDSL 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 V.35 L INE D RIVER TO A DTE D EVICE
The HDSL Line Driver V.35 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 4-2). Appendix A describes pin assignments and signal sources
for the Line Driver’s V.35 interface. When purchasing or constructing an interface
cable, please refer to the pin diagrams in Appendix A as a guide.
Figure 4-2. Connecting the Line Driver to a V.35 serial DTE.
4.2.2 C ONNECTING THE V.35 L INE D RIVER TO A DCE D EVICE
The Line Driver provides a V.35 (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 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 required 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).
Straight-through
M/34 cable
DSL span
V.35 router (DTE)
HDSL Line Driver (ME0006A-V35) (DCE)
Remote HDSL Line
Driver (ME0006A-V35)

16
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)
Figure 4-3. Connecting the Line Driver to a V.35 serial DCE.
4.3 Connecting the Line Driver‘s X.21 Serial Interface
The Line Driver 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 X.21 L INE D RIVER TO A DCE OR DTE 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 4-4).
Figure 4-4. Connecting the Line Driver to a X.21 DTE or DCE.
Crossover M/34
cable
DSL span
V.35 multiplexor (DCE)
HDSL Line Driver (ME0006A-V35) (DCE)
Remote HDSL Line
Driver (ME0006A-V35)
Straight-through
DB15 cable
DSL span
Router (DTE) or
Multiplexor (DCE)
HDSL Line Driver (ME0006A-X21)
(DCE or DTE)
Remote HDSL Line
Driver (ME0006A-X21)

17
CHAPTER 4: Installation
To modify the DCE/DTE orientation from the default position (DCE), you must
open the X.21 Line Driver’s case.
4.3.2 O PENING THE C ASE
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 4-5. Twist the screwdriver head slightly, and the
top half of the case will separate from the lower half (see Figure 4-5). Take caution
not to damage of the PC-board mounted components.
Figure 4-5. Opening the case with a small screwdriver.
The DCE/DTE strap is located on the top side of the Line Driver’s PC board (see
Figure 4-6). 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.

18
2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)
Figure 4-6. Setting the DCE/DTE strap.
4.4 Connecting Power
The Line Driver V.35 and X.21 models use a 5-VDC, 2-A universal input 100- to
240-VAC power supply (center pin is +5V). The power supply has a male IEC 320
power entry connector. Connect the power supply 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.
WARNING
There are no user-serviceable parts in the power supply. Only qualified
service personnel should replace the fuse. Contact Black Box Technical
Support at 724-746-5500 for details.
DB15
connector

19
CHAPTER 5: Operation
5. Operation
Once the 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 Line Driver, first be sure that you have read Section 4.4. The
unit powers up when it is plugged into the power source.
5.2 LED Status Indicators
The 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.
Figure 5-1. Front panel.
• 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.