Black Box ME445C-530, ME444AE-530-R3, ME444A-R3, ME444AE-R3, ME445C-35 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 724-746-0746
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
MARCH 2004
ME444A-R3
ME444AE-R3
ME444A-530-R3
ME444AE-530-R3
ME445C-35
ME445C-530
ME445C-X.21
256-kbps Line Driver
(V.35, RS-530, or X.21)
1
FCC AND IC RFI STATEMENTS
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
256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
Safety Warnings
Always observe standard safety precautions during installation,
operation, and maintenance of this product. Only qualified and
authorized service personnel should adjust, maintain, or repair this
instrument. Do not attempt to adjust, maintain, or repair the equipment.
Telecommunication Safety
The safety status of each of the ports on the line driver appears below:
Ports
Safety Status
V.24, V.35, V.36, X.21, RS-530 SELV Circuit operating with
LAN Safety Extra-Low Voltage
G.703, Line TNV-1 Circuit whose normal
operating voltage is
within the limits of SELV,
on which overvoltages
from telecommunications networks are
possible.
FCC Part 15 User Information
This equipment has been tested and found to comply with the limits of a
Class A digital device, pursuant to Part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy, and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to the radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Warning per EN 55022
This is a Class A product. In a domestic environment, this product may
cause interference, in which case the user may be required to take
adequate measures.
3
Declaration of Conformity/Supplementary Information
Declaration of Conformity
The line driver conforms to the following standard(s) or other normative
document(s);
EMC: EN 55022 (1994) Limits and methods of measure-
ment of radio disturbance
characteristics of information
technology equipment.
EN 50082-1 (1992) Electromagnetic compatibility—
Generic immunity standards for
residential, commercial, and light
industry.
Safety: EN 60950 (1992/3) Safety of information technology
equipment, including electrical
business equipment.
Supplementary Information
This product complies with the requirements of the EMC Directive
89/336/EEC and the Low Voltage Directive 73/23/EEC. The product was
tested in a typical configuration by the manufacturer.
4
256-KBPS LINE DRIVER (V.35, RS-530, 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.
5
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.
6
256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
TRADEMARKS USED IN THIS MANUAL
AS/400 and IBM are registered trademarks of International Business
Machines Corporation.
Any other trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.
7
CONTENTS
Contents
Chapter Page
1. Specifications ............................................................................................. 8
2. Introduction ...............................................................................................10
2.1 Physical Description ............................................................................10
2.2 Functional Description ..................................................................... 11
2.2.1 Encoder Modulator ................................................................. 11
2.2.2 Modulation Timing ................................................................ 12
2.2.3 Signal Levels ........................................................................... 12
2.2.4 Receiver .................................................................................. 12
2.2.5 V.54 Diagnostics ..................................................................... 13
2.2.6 Test-Pattern Generator and Receiver ................................... 13
2.3 Applications ........................................................................................ 13
3. Configuration...............................................................................................15
3.1 Placement of the Standalone Version .................................................15
3.2 Installing the Card Version in the RackNest 2/14..............................15
3.3 Configuring the Standalone or Card Version.....................................17
4. Installation....................................................................................................21
4.1 Installing the Standalone Version in 19" Racks ..................................21
4.1.1 Overview .....................................................................................21
4.1.2 Installing a Single Unit in a 19-Inch Rack ................................21
4.1.3 Installing Two Standalone Units in a 19-Inch Rack.................22
4.2 Installing the 256-kbps Rackmount Card Version ..............................24
4.3 Connecting Data Cables .......................................................................33
4.3.1 Power Connection......................................................................33
4.3.2 LINE Connection.......................................................................34
4.3.3 DTE Connection ........................................................................34
5. Operation ...................................................................................................36
5.1 Controls and Indicators .................................................................... 36
5.2 Operating Procedure ........................................................................ 38
6. Troubleshooting ........................................................................................39
6.1 Loop Tests ...........................................................................................39
6.2 Bit-Error-Rate Tester (BERT) ..............................................................39
6.3 The Modem Self-Test ........................................................................ 41
6.4 Local Analog Loopback ......................................................................41
6.5 Remote Digital Loopback ...................................................................43
6.6 Local Digital Loopback ......................................................................44
6.7 Calling Black Box .............................................................................. 45
6.8 Shipping and Packaging .................................................................... 46
Appendix: Maximum Distances ...................................................................... 47
8
256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
1. Specifications
Compliance: FCC Class A, IC Class/classe A
Protocol: Synchronous or asynchronous
Clock Source: Internal, external (from attached device), or receive clock derived
from the receive signal
Flow Control: None
Operation: 4-wire, full- or half-duplex, point-to-point or multipoint
Data Rate: Sync: 19.2, 32, 48, 56, 64, 72, 96, 112, 128, 144, 192, or 256 kbps
(user-selectable); Async: 19.2, 28.8, 38.4, 57.6, or 115.2 kbps (user-selectable)
Maximum Distance: See the tables in the Appendix
User Controls: (4) Front-mounted buttons: (1) DIG, (1) ANA, (1) REM, (1) PATT;
(1) Internal data-rate screwdial; (14) Internal jumpers and (1) internal 3-position
DIP switch for timing, testing, signal levels/impedances, and other features
Diagnostics: V.54-compliant loopback tests; V.52-compliant BERT
Standards: Loopback tests: ITU-TSS V.54; BERT: ITU-TSS V.52
Leads/Signals Supported: See Tables 4-2 through 4-5
MTBF: 75,500 hours
Interfaces: Line side: Proprietary; Device side: ITU-TSS V.35
Connectors: ME444A-R3, ME444AE-R3: (1) 34-pin M-block female, (1) 5-position
terminal block;
ME444A-530-R3, ME444AE-530-R3, ME445C-530, ME445C-35,
ME445C-X21: (1) DB25 female, (1) 5-position terminal block
Indicators: (7) Front-mounted LEDs: PWR (power), RTS, TD, RD, DCD, TEST,
ERR (error)
Temperature Tolerance: 32 to 122°F (0 to 50°C)
Humidity Tolerance: Up to 90% noncondensing
9
CHAPTER 1: Specifications
Maximum Altitude: 8000 ft. (2438.4 m)
Enclosure: High-impact plastic
Power: ME444A-R3: Directly from outlet through detachable 5-ft. (1.5-m) power
cord (included); Optimal input: 115 VAC, 60 Hz; Input ranges: 103.5 to
126.5 VAC, 47 to 63 Hz; Consumption: 5 watts;
ME444AE-R3: Directly from outlet through detachable 5-ft. (1.5-m) power cord;
Optimal input: 230 VAC, 60 Hz; Input ranges: 207 to 253 VAC, 47 to 63 Hz;
Consumption: 5 watts;
ME445C: From the RackNest 2/14; Consumption: 5 watts
Size: ME444A/E-R3: 1.8"H x 7.6"W x 9.6"D (4.6 x 19.3 x 24.4 cm), but the buttons
protrude up to 0.3" (0.8 cm) from the front panel and the connectors protrude
up to 0.8" (2 cm) from the rear panel;
ME445C: 6.2"H x 0.9"W x 9"D (15.7 x 2.3 x 22.9 cm)
Weight: ME444A/E-R3: 3.1 lb. (1.4 kg); ME445C: 0.8 lb. (0.4 kg)
10
256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
2. Introduction
The 256-kbps Line Driver is a short-range modem for synchronous or
asynchronous transmission—full- or half-duplex—over unconditioned lines. With a
range of up to 11.8 miles (19 km), the line driver operates at user-selectable
synchronous data rates from 19.2 to 256 kbps or asynchronous data rates from
19.2 to 115.2 kbps. The line driver is available in standalone V.35 or RS-530
(ME444A/E-R3) or rackmount card V.35, RS-530, or X.21 (ME445C) versions.
The line driver uses conditional differential diphase modulation (EUROCOM Std.
D1) to provide immunity from background noise, eliminate normal line distortion,
and enable efficient transmission and reception of serial data over twisted-pair
cable. The modem is coupled to the line through isolation transformers which, in
conjunction with protective circuitry, safeguard against AC or DC overvoltages.
With this protective circuitry, the line driver can operate even when DC is
connected to the line.
Transmit timing is provided internally, derived externally from the PC or terminal,
or regenerated from the receive signal. Receive timing is always regenerated from
the receive signal.
The line driver features V.54 diagnostic capabilities for local analog loopback and
local and remote digital loopback testing. In the digital loopback mode, the
operator at either end of the line may test both modems and the line. The
loopback is controlled either by pressing front-panel buttons or by manipulating
signals on the V.35, RS-530, or X.21 (DTE) interface.
The line driver incorporates a built-in Bit Error Rate Tester (BERT). The internal
BERT enables complete testing of both modems and the line without external test
equipment. Pressing the line driver’s front-panel PATT button causes the unit to
generate a pseudo-random test pattern (511-bit, according to ITU-TSS V.52) for
testing end-to-end connectivity. The ERR LED flashes when a bit error occurs.
2.1 Physical Description
The line driver stands alone as a desktop unit, or can be mounted in a 19-inch rack
with optional brackets (see Section 4.1). Also available is a rackmount card version
that installs in the RackNest 2/14 (see Section 4.2). For descriptions of the line
driver’s controls and indicators, see Section 5.1.
11
CHAPTER 2: Introduction
2.2 Functional Description
This section describes the operation of the line driver’s circuit blocks, primarily the
circuits required for correctly configuring the modem (see Figure 2-1 below).
Figure 2-1. Line driver block diagram.
2.2.1 E
NCODERMODULATOR
The encoder modulator receives data from the DTE, then modulates the data
using the “conditional diphase modulation” technique. You can configure the
encoder to operate in one of three modes:
• 4-wire full-duplex (point-to-point)
• 4-wire half-duplex (point-to-point)
• 4-wire multipoint
The appropriate mode is determined by the setting of two jumpers: CARRIER (J2)
and RTS-CTS DLY (J4). For multipoint applications, two additional jumpers must
be set: XMT IMP (J13) and RCV IMP (J10). See Section 3.3 for a more detailed
explanation of the correct jumper settings.
12
256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
NOTE
In multipoint applications, do not use the 0-msec option for the
RTS–CTS delay.
2.2.2 M
ODULATION
T
IMING
This circuit supplies the transmit clock to the encoder. Three clock sources are
available on the XMT CLK jumper (J3):
• INT—Internal clock. From the modem’s internal crystal oscillator.
• EXT—External clock. From DTE.
• RCV—Receive clock. Recovered from the receive signal.
There is also an ASY (asynchronous) setting, but this has no function and should
not be selected.
2.2.3 S
IGNALLEVELS
Two options are available for the transmit and receive signal levels: 0 and -6 dBm.
You can control the transmit level with the XMT LVL jumper. You can control the
receive level with the RCV LVL jumper.
2.2.4 R
ECEIVER
The receiver comprises several circuits, as shown in the block diagram (see
Figure 2-1):
• The RECEIVE FILTER, which removes all the out-band frequencies.
• The EQUALIZER, which comprises several equalizers activated according to
data rate.
• The digital Automatic Gain Control (AGC), which automatically compensates
for the attenuation of the line.
13
CHAPTER 2: Introduction
2.2.5 V.54 D
IAGNOSTICS
V.54 loops are activated manually with the front-panel buttons, or through the
DTE interface. The buttons and the DTE interface can be enabled or disabled
separately by jumpers J7 and J8 (shown in Figure 3-1 and described in Table 3-1).
When you use the line driver as a tail-end to a digital network, the V.54 DLY
jumper in the modems located close to the network should be set to ON to prevent
multiple loopbacks. The delay switch is used to prevent the last modem from
receiving the complete V.54 data sequence and, in turn, being induced into a loop.
2.2.6 T
EST-PATTERNGENERATOR ANDRECEIVER
This feature allows for easy and quick testing of the local modem as well as the
communication link. When the PATT button on the front panel is pressed, the
circuit sends and checks a standard 511-bit pseudo-random pattern. If the modem
encounters errors, the ERR LED remains ON or blinks.
The test can be carried out in local analog loopback, in remote digital loopback, or
in normal point-to-point operation opposite a remote line driver modem. Press the
PATT pushbutton on the remote unit or connect a Bit Error Rate Tester that uses
the standard 511-bit pattern.
2.3 Applications
The diagrams on this page and the following pages illustrate the line driver
operating in various applications.
Figure 2-2. Point-to-point application.
AS/400
®
256-kbps
Line Driver
256-kbps
Line Driver
AS/400
19.2 to
256 kbps
4-wire
Up to 11.8 mi. (19 km)
14
256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
Figure 2-3. Tail-circuit application.
Figure 2-4. Multipoint application.
Sync host
Sync host
CSU/DSU
DDS
(56 kbps)
External
clock
4-wire
twisted pair
Receive
clock
CSU/DSU
Tail circuit
256-kbps
Line Driver
256-kbps
Line Driver
IBM®S/3X
mainframe
V.35 interface
V.35
cable
4-wire
twisted pair
(64 kbps)
256-kbps
Line Driver
256-kbps
Line Driver
256-kbps
Line Driver
V.35
cable
V.35
cable
V.35
cable
V.35 interface
V.35 interface
V.35 interface
IBM 3274
controller
IBM 3274
controller
IBM 3274
controller
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