ME270A-R3, ME271,272,275C 1

ME270A-R3, ME271,272,275C 1
ME270A-R3
ME270A-R3
ME270C-35-R2
ME270C-530-R2
JANUARY 2003
ME271A-R3
ME272A-R3
ME275C-35-R2
ME275C-530-R2
ME275C-X21-R2
2.048-Mbps Short-Range Driver
2.048-Mbps Short-Range Driver/X.21
2.048-Mbps Short-Range Driver/422
19" Card Versions for RackNest 2/14
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
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.
WARNING!
Always observe standard safety precautions during installation,
operation, and maintenance of this product. To avoid the possibility of
electrical shock, disconnect the power cord from the power source
before you remove the line driver’s cover.
CAUTION
Shielded DTE cables should be used with this unit to ensure compliance
with the Class A limits mentioned above.
Changes or modifications to this unit not expressly approved by the
party responsible for compliance could void the user’s authority to
operate the equipment.
1
2.048-MBPS SHORT-RANGE DRIVER
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
2
NOM STATEMENT
tipo descrito en el instructivo de operación, o como se indique en el aparato.
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.
3
2.048-MBPS SHORT-RANGE DRIVER
TRADEMARKS USED IN THIS MANUAL
Any trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.
4
CONTENTS
Contents
Chapter
Page
1.
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 DTE Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.8 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.1 Timing Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.2 G.703-HDB3 Interface Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.
Installing the Standalone Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1 Site Requirements and Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3 Installation and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3.1 Configuring the Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3.2 Connecting the Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.3 Connecting the Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.
Installing the 19" Card Versions in the RackNest 2/14 . . . . . . . . . . . . . . . 26
4.1 The RackNest 2/14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1.1 Line Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1.2 DB25 DTE Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.1 AC Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.2 Power Supply with Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.3 The 2.048-Mbps Short-Range Driver Card’s Front Panel . . . . . . . . . . 28
4.4 Installing the Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.4.1 Setting Internal Jumpers and Switches . . . . . . . . . . . . . . . . . . . 29
4.4.2 Installing the Card in the RackNest 2/14 . . . . . . . . . . . . . . . . . 30
4.4.3 Connecting the Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5
2.048-MBPS SHORT-RANGE DRIVER
Contents (continued)
Chapter
Page
5.
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.1 Front-Panel Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2 Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2.1 Powering On the Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2.2 Normal Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2.3 Powering Off the Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.
Troubleshooting and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.1 V.54 Loopback Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.1.1 Local Analog Loopback (LLB). . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.1.2 Remote Digital Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.1.3 Local Digital Loopback (DIG) . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.2 Internal BERT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.2.1 Modem Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.2.2 Two-BER Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.3 Calling Black Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.4 Shipping and Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Appendix. Interface Connector Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
A.1 V.24, V.35, X.21, and RS-530 DTE Interfaces . . . . . . . . . . . . . . . . . . . . 42
A.2 V.36 Interface Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
A.3 DB15 Line Connector (Standalone Driver) . . . . . . . . . . . . . . . . . . . . . 46
6
CHAPTER 1: Specifications
1. Specifications
1.1 Line Interface
Line Type: Unloaded 4-wire twisted-pair (19 to 26 gauge preferred)
Line Code: Strap to HDB3 or AMI (both comply with ITU G.703) or B8ZS
Framing: Unframed format
Transmit Level: According to G.703
Data Rate: 2048, 1920, 1544, 1536 kbps
Impedance: 75Ω for 2048 and 1920 kbps unbalanced (BNC coax);
100Ω for 1544 and 1536 kbps balanced (terminal block or DB15);
120Ω for 2048 and 1920 kbps (terminal block or DB15)
Return loss: Better than 15 dB
Line Attenuation: Up to 40 dB
Range: Up to 1 mile (1.6 km) over 24 AWG wire
Connector: DB15 or 5-screw terminal block
1.2 DTE Interface
Interface: ME270A-R3, ME270E-R3, ME270C-35-R2, ME275C-35-R2:
ITU-TSS V.35;
ME271A-R3, ME275C-X21-R2: ITU-TSS X.21;
ME272A-R3, ME270C-530-R2, ME275C-530-R2:
EIA RS-530/449/422 (ITU-TSS V.36)
Protocol: Synchronous
Operation: Full- or half-duplex over unloaded 4-wire twisted-pair cable
Data Rates: 32, 64, 128, 192, 256, 384, 512, 768, 1024, 1536, 1544, 1920, or
2048 kbps
7
2.048-MBPS SHORT-RANGE DRIVER
Connectors: ME270A-R3, ME270A-R3, ME270C-35-R2: (1) 34-pin M-block
female, (1) 5-screw terminal block;
ME275C-35-R2: (1) 34-pin M-block female;
ME271A-R3, (1) DB15 female, (1) 5-screw terminal block;
ME275C-X21-R2: (1) DB15 female;
ME272A-R3, ME270C-530-R2: (1) DB25 female, (1) 5-screw terminal block;
ME275C-530-R2: (1) DB25 female; (EIA RS-530; DB25-to-DB37 adapter cable
included for EIA RS-449/422 [ITU-TSS V.36] interfaces)
1.3 Timing
Transmit and Receive Clocks: Derived from three alternative sources:
1. Internal oscillator,
2. External from the DTE, or
3. Receive clock derived from the receive signal, looped back as a transmit
clock.
1.4 Diagnostics
Buttons: (4) front-panel pushbuttons: REM, PATT, DIG, and ANA
V.54 Loopbacks: Local loopback: activated by front-panel LLB button or by
the DTE interface signal (V.24, V.35, and RS-530 only);
Remote loopback: activated by front-panel REM button or by the
DTE interface connector signal (V.24, V.35, and RS-530 only);
Local digital loopback: activated by front-panel DIG button
Self-Test: Driver self-test activated by front-panel pushbuttons PATT and
ANA
Internal BERT: Built-in pattern generator and tester activated by front-panel
pushbutton PATT, complies with ITU V.52
1.5 LED Indicators
Indicators: (7) LEDs: (1) PWR(green, Power), (1) RTS (yellow, Request to
Send), (1) TD (yellow, Transmit Data), (1) RD (yellow, Receive Data), (1)
DCD (yellow, Data Carrier Detect), (1) TEST (red, Test), (1) ERR (yellow,
Bit Errors)
1.6 Environmental
Temperature: 32 to 122°F (0 to 50°C)
Humidity: Up to 90% noncondensing
8
CHAPTER 1: Specifications
1.7 Power Supply
AC Source: 100 to 240 VAC (±10%), 50 to 60 Hz, 6.8 VA
Power Consumption: AC: 6.8 VA; DC: 5.7 W; Card versions: 5.2 W
Fuses: Standalone models: 0.25 A slow-blow for 230 VAC;
Card versions: 1 A, 250 V slow-blow
1.8 Physical
Size: Standalone units: 1.7"H x 8.4"W x 10.1"D (4.3 x 21.3 x 25.7 cm);
Cards: 6"W x 9"L (15.2 x 22.9 cm)
Weight: Standalone units: 1.9 lb (0.9 kg); Cards: 0.9 lb. (0.4 kg)
9
2.048-MBPS SHORT-RANGE DRIVER
2. Introduction
2.1 Overview
The 2.048-Mbps Short-Range Driver is a high-speed, synchronous, short-range
line driver. It operates in full-duplex mode over unconditioned lines. The
Short-Range Driver also functions as a baud rate and interface converter.
The 2.048-Mbps Short-Range Driver is available in both a standalone unit and a
card version. The card installs in the RackNest 2/14 (RM110A), a 19-inch modem
rack, which holds up to 14 cards.
2.1.1 APPLICATIONS
Figure 2-1 illustrates an interface and rate conversion application.
V.35
(256 kbps)
V.35
(256 kbps)
E1 (2048 kbps)
1.6 km (1 mile)
2.048-Mbps
Short-Range
Driver
DTE
2.048-Mbps
Short-Range
Driver
DTE
Figure 2-1. Point-to-point interface and rate conversion application.
Figure 2-2 shows a tail-end application.
1.75 km
(1 mile)
1.6 km
(1 mile)
Receive
Clock
DTE
2.048-Mbps
Short-Range
Driver
External
Clock
2.048-Mbps
Short-Range
Driver
Receive
Clock
2.048-Mbps
Short-Range
Driver
Internal
Clock
2.048-Mbps
Short-Range
Driver
Figure 2-2. Tail-end application for DDS service.
10
DTE
CHAPTER 2: Introduction
2.1.2 FEATURES
The 2.048-Mbps Short-Range Driver operates at 13 selectable rates of up to
2048 kbps, for a line attenuation of up to 40 dB on twisted-pair or coax cable.
This provides an approximate operating range of up to 1.6 km (1 mile).
The 2.048-Mbps Short-Range Driver incorporates interface circuits for the
terminal/computer, an automatic equalizer, a modulator, and a demodulator.
Coupling to the line or coax cable is protected by isolation transformers, which, in
conjunction with other circuitry, guard against AC or DC voltage surges. The
protection circuitry enables operation even when a DC power source is connected
to the line.
Zero suppression on the link is switch-selectable for either AMI, HDB3, or B8ZS
coding, according to the ITU G.703 standard.
DTE Interface
The DTE port has modular, field-changeable interfaces: V.35, X.21, or
RS-530/449/422, V.36.
Timing
Transmit and receive timing can be provided internally or derived externally from
the data terminal or receive signal. Internal FIFOs provide jitter attenuation or
phase difference correction either from the incoming analog signal (line side) or
from the external clock on the DTE side.
Diagnostics
The 2.048-Mbps Short-Range Driver provides local analog, remote digital, and
local digital loopbacks in compliance with the V.54 standard. The loopbacks are
activated manually via the front-panel buttons. In addition, the local analog and
remote digital loopbacks are initiated via the DTE interface pins (“HH” and “JJ”
for V.35 or 18 and 21 for RS-530 or V.24).
The driver includes an internal Bit Error Rate Tester (BERT) for complete testing
of the local and remote modem and the link quality. There’s no need for external
test equipment. The driver runs an internal pseudo-random 511-bit test pattern in
accordance with the ITU V.52 standard.
11
2.048-MBPS SHORT-RANGE DRIVER
2.2 Functional Description
This section contains functional descriptions of the 2.048-Mbps Short-Range
Driver’s circuit blocks. A block diagram of how the driver works is shown below.
Figure 2-3. Driver’s block diagram.
2.2.1 TIMING GENERATOR
The driver transmits data to the line at the following baud rates: 2048, 1920, 1544,
or 1536 kbps. The baud rates support different data rates, which enable the Driver
to be used as a rate converter.
Table 2-1. Line rates and DTE data rates.
Baud Rates
DTE Data Rates
2048 kbps
32, 64, 128, 256, 512, 1024, and 2048 kbps
1920 kbps
1920 kbps
1544 kbps
1544 kbps
1536 kbps
192, 384, 768, and 1536 kbps
Transmit and receive timing are derived from the following sources:
• Internal—Supplied by the internal crystal oscillator.
• External—Supplied by the DTE.
• Receive—Recovered from receive signal.
12
CHAPTER 2: Introduction
If the DTE interface is a G.703-HDB3 interface, then the recovered clock from this
interface is used as the external clock.
Figure 2-4. Driver’s clocking diagram.
Figure 2-5. Driver’s clock configuration.
13
2.048-MBPS SHORT-RANGE DRIVER
2.2.2 G.703-HDB3 INTERFACE TIMING
The received data from the analog side is output on the DTE interface with a jitterfree clock for TC and RC (see Figure 2-6 and 2-7). The transmit data on the analog
side is the input data from the DTE interface. The G.703-HDB3 recovered clock
(from the input data) is used as an input clock for the transmit FIFO, as shown in
Figure 2-6. The same FIFO used for external clock is always present when using the
G.703-HDB3 interface.
Figure 2-6. G.703/HDB3 clock diagram, DTE interface.
Using the internal or receive clock, provisions must be made to loop back (on the
DTE side) the incoming clock (data and clock out) to the transmit data (data and
clock inputs). Refer to Figure 2-7 for clock configuration.
14
CHAPTER 2: Introduction
Figure 2-7. G.703-HDB3 clock configurations, DTE interface.
Encoder/Decoder
The 2.048-Mbps Short-Range Driver encoder/decoder converts from NRZ to
HDB3, AMI, or B8ZS on the transmission side and converts back to NRZ on the
receive side.
Line Driver
The line driver provides a three-level alternate mark inversion signal according to
the ITU-G.703 standard.
Receiver
An AGC end equalizer provides the received signal for the clock and data recovery
circuitry.
NRZ Interface
The digital side provides an interface choice of V.35, X.21, RS-232, RS-530, or V.36
(via adapter cable).
The 2.048-Mbps Short-Range Driver with G.703-HDB3 on the digital side for data
rates 2048, 1024, 512, 256, or 128 kbps enables operation as a baud rate converter
or repeater for G.703.
15
2.048-MBPS SHORT-RANGE DRIVER
3. Installing the Standalone Unit
The driver is pre-assembled. It’s designed for tabletop or 19-inch rack installation.
For rack installation instructions, refer to your rack user’s manual.
After installing the driver, refer to Chapter 5 for operating instructions.
WARNING
Internal settings, adjustment, maintenance, and repairs should be
performed only by a skilled technician who is aware of the hazards
involved. Always observe standard safety precautions during
installation, operation, and maintenance of this product.
3.1 Site Requirements and Prerequisites
An AC-powered driver should be installed within 5 ft. (1.5 m) of an easily accessible
grounded AC outlet. The outlet should supply 100 VAC to 230 VAC.
The trunk circuit which supplies power to the unit must be protected by a circuit
breaker of 16 A maximum.
Allow at least 36" (91.4 cm) of frontal clearance for operating and maintenance
accessibility. Allow at least 4" (10.2 cm) clearance at the rear of the unit for signal
lines and interface cables.
3.2 Package Contents
Your package should include the following items:
• (1) 2.048-Mbps Short-Range Driver
• (1) AC power cord
• (1) CD-ROM containing this users’ manual
The ME272A-R3 also includes:
• (1) RS-530 male to RS-449 female cable
If anything is missing or damaged, please contact Black Box at 724-746-5500.
16
CHAPTER 3: Installing the Standalone Unit
3.3 Installation and Setup
The 2.048-Mbps Short-Range Driver is intended for tabletop or bench installation.
No provision is made for bolting the unit on the tabletop.
To install the driver:
1. Determine the required configuration (according to your application) and
set the DIP switches accordingly.
2. Connect the line.
3. Connect power.
3.3.1 CONFIGURING THE DRIVER
This section describes how to configure the driver for a typical application.
Figure 3-1 shows the DIP switch location. Table 2-1 describes DIP switch functions
and default settings.
WARNING
Make sure that the power cord is disconnected before setting the DIP
switches.
1. Open the lid on the driver’s bottom panel.
2. Select the data rate (see SW2 in Table 3-1 for the proper switch settings). By
selecting the data rate, you also define the Driver’s line coding.
3. Select the line code (see SW4 in Table 3-1). The line code must be the same
for both local and remote units.
• HDB3—Select 32, 64, 128, 256, 512, 1024, 1920, or 2048 kbps for the data rate.
In this case, the B8ZS and AMI section settings are irrelevant.
• B8ZS—Select 192, 384, 768, 1536, or 1544 kbps for the data rate. Set B8ZS to
ON, and AMI to OFF.
• AMI—Select 192, 384, 768, 1536, or 1544 kbps for the data rate. Set AMI to
ON, and B8ZS to OFF.
17
2.048-MBPS SHORT-RANGE DRIVER
4. Select the clock source (see SW4 in Table 3-1). One of the modems should be
set to external or internal clock, another modem to receive.
• External—Set EX/R and INT to OFF.
• Internal—Set INT to ON. EX/R is disabled.
• Receive—Set EX/R to ON and INT to OFF.
5. Set the line impedance (see SW3 in Table 3-1). The driver supports 75Ω
unbalanced and 120Ω balanced impedance for 32, 64, 128, 256, 512, 1024,
1920, and 2048 kbps. In addition, the driver supports 100 Ω impedance for
192, 384, 768, 1536, and 1544 kbps.
• 75Ω—Set B/UB to ON.
• 120Ω—Set B/UB to OFF.
• 100Ω—Set the driver to 192, 384, 768, 1536, or 1544 kbps. In this case, the
B/UB section of SW3 switch is disabled.
6. Close the bottom panel lid.
Proceed with the line, DTE, and power connections as described in
Sections 3.3.2 and 3.3.3.
18
CHAPTER 3: Installing the Standalone Unit
Figure 3-1. Bottom-panel jumper and DIP switches.
Table 3-1. Jumper and DIP switch functions and settings.
DIP Switch
Function
Possible Settings
Factory Setting
EX/R and INT
sections, SW4
Select the transmit clock.
INT—ON, internal clock; INT—ON
EX/R section is disabled. EX/R—OFF
EX/R—ON, INT—OFF;
receive clock.
EX/R—OFF, INT—OFF;
external clock.
NOTE
When set to external clock, the driver automatically configures itself to
the DTE data rate, disabling SW3 (baud rate).
B8ZS and AMI
sections, SW4
Select the line code.
B8ZS—OFF, AMI—ON; B8ZS—OFF
AMI line code.
B8ZS—OFF, AMI—OFF, AMI—OFF
HDB3 or B8ZS line
code, depending on the
selected data rate.
19
2.048-MBPS SHORT-RANGE DRIVER
Table 3-1 (continued). Jumper and DIP switch functions and settings.
DIP Switch
Function
Possible Settings
Factory Setting
NOTE
When setting data rate to 32, 64, 128, 256, 512, 1024, 1920, or 2048 kbps, the
HDB3 line coding is automatically selected. In this case, the B8ZS and AMI
section settings are irrelevant. The B8ZS and AMI sections are in use only if
the data rate is set to 192, 384, 768, 1536, or 1544 kbps.
SWEN section,
SW3
Enables activation of the
loopbacks and internal
BERT via the front-panel
buttons.
ON—The diagnostic tests ON
can be activated via the
front panel.
OFF—The diagnostic
tests cannot be activated
via the front panel.
V54E section,
SW3
CNTE section,
SW3
B/UB section,
SW3
20
Controls activation of the
local digital loopback when
remote digital loopback is
initiated from the remote
unit.
ON—Local digital
loopback activation is
enabled.
Selects the transmit carrier
mode.
ON—Carrier follows the
RTS line.
Selects the line impedance:
• Balanced: terminal block
or DB15
• Unbalanced BNC
ON
OFF—Local digital
loopback activation is
disabled.
OFF—Carrier is
constantly ON.
OFF
ON—75Ω (for 32, 64,
128, 256, 512, 1024,
1920, and 2048 kbps).
OFF—120Ω (for 32, 64,
128, 256, 512, 1024,
1920, and 2048 kbps.
According to the
connector type
CHAPTER 3: Installing the Standalone Unit
Table 3-1 (continued). Jumper and DIP switch functions and settings.
DIP Switch
Function
Possible Settings
Factory Setting
NOTE
100Ω line impedance is set by selecting one of the following data rates:
192, 384, 768, 1536, and 1544 bps. In this case, the settings of the SW3
B/UB section are ignored.
ALBE section,
SW3
Enables local analog
loopback activation from
the DTE (via pin 18 for V.24,
RS-530, V.36, or pin “JJ”
for V.35).
ON—The local analog
loopback activation
from the DTE is enabled.
OFF—The local analog
loopback activation from
the DTE is disabled.
OFF
NOTE
Set this section to DIS if the DTE interface does not support the local analog
loopback activation via the appropriate pin.
RLBE section,
SW3
Enables remote digital
loopback activation from the
DTE (via pin 21 for V.24,
RS-530, V.36, or pin “HH”
for V.35).
ON—The remote digital
loopback activation
from the DTE is enabled.
OFF—The remote digital OFF
loopback activation
from the DTE is disabled.
NOTE
Set this section to DIS if the DTE interface does not support the remote
digital activation via the appropriate pin.
21
2.048-MBPS SHORT-RANGE DRIVER
Table 3-1 (continued). Jumper and DIP switch functions and settings.
DIP Switch
Function
SW2
Selects data rate.
J4, CHASS
Possible Settings
SW54
0
0
0
0
0
0
0
0
1
1
1
1
1
Controls the connection
between the driver
signal ground and the
from (chassis) ground.
SW53
0
0
0
0
1
1
1
1
0
0
0
0
1
SW52
0
0
1
1
0
0
1
1
0
0
1
1
0
Factory
Setting
SW51
0
2048
1
1920
0
1544
1
1536
0
1024
1
768
0
512
1
384
0
256
1
192
0
128
1
64
0
32
CON—Signal ground is
connected to the frame
ground.
256
CON
DIS—Signal ground is
disconnected from the
frame ground.
WARNING
Disconnecting the signal ground from the frame ground may render the
unit unsafe for connection to unprotected telecommunication networks
in some locations.
22
CHAPTER 3: Installing the Standalone Unit
3.3.2 CONNECTING THE INTERFACES
Figure 3-2 shows the AC-powered Driver’s rear panel.
Figure 3-2. 2.048-Mbps Short-Range Driver with V.35 interface and
terminal block line connector (AC version).
Connecting the line
The Driver’s line connector may be optionally DB15 female or a 5-port terminal
block or two BNC coax connections. Refer to the appropriate section below for the
description of the connection procedures for the relevant line interface types.
To connect the DB15 balanced interface:
Attach the DB15 male cable connector to the driver’s line port (“LINE”).
Refer to the Appendix for the DB15 connector pin assignment.
To connect the terminal block:
1. Connect the transmit pair to the terminals marked XMT.
2. Connect the receive pair to the terminals marked RCV.
3. Connect the ground wire to the terminal marked GND (optional).
NOTES
The transmit and receive pairs are polarity insensitive.
The GND terminal is connected to the AC power ground wire.
To connect the BNC connectors:
1. Connect the transmit cable to the BNC connector marked XMT.
2. Connect the receive cable to the BNC connector marked RCV.
23
2.048-MBPS SHORT-RANGE DRIVER
Connecting the DTE
The rear-panel DTE connector provides an interface for data input/output, clock
reference, and control signal exchange between the driver and the DTE. The DTE
interface may terminate in the following connectors:
• V.24/RS-232—DB25 female
• RS-530—DB25 female
• V.36/RS-449—via adapter cable converting between an RS-530 connector and
a DB37 female connector
• V.35—34-pin female
• X.21—DB15 female
• G.703-HDB3—DB15 female or BNC
Pin assignments for the DTE interface options are described in the Appendix.
The pin assignment of the G.703-HDB3 DB15 connector is the same as of the line
side DB15 connector (see the Appendix).
• When using the driver with an X.21 interface in the external clock mode,
connect the input clock to pin 7 [EXTC(A)] and pin 14 [EXT(B)] of the
15-pin DTE connector.
We recommend using a shielded twisted-pair cable between the driver and the
DTE. The receivers on the driver are 100Ω terminated (for X.21 and RS-530). If
problems are encountered with the connection to the DTE interface, make sure
that the DTE interface is terminated correctly.
24
CHAPTER 3: Installing the Standalone Unit
3.3.3 CONNECTING THE POWER
WARNING
Before switching on the unit and connecting any other cable, the
driver’s protective earth terminals must be connected to the protective
ground conductor of the mains power cord. If you are using an
extension cord (power cable), make sure it is grounded as well.
Any interruption of the protective (grounding) conductor (inside or
outside the instrument) or disconnecting of the protective earth terminal
can make the driver dangerous. Intentional interruption is prohibited.
The line fuse is located in an integral fuse holder located on the rear
panel. Make sure that only fuses of the required rating, as marked on the
rear panel, are used for replacement. Do not use repaired fuses or shortcircuit the fuse holder. Always disconnect the mains cable before
removing or replacing the fuse. Whenever it is likely that the fuse
protection has been damaged, make the driver inoperative and secure it
against unintended operation.
Supply AC power to the Driver through the 5-ft. (1.5-m) standard power cable
terminated by a standard 3-prong plug. The cable is included.
1. Connect the power cable to the power connector on the driver’s rear panel.
2. Connect the power cable to the mains outlet. The driver turns on
automatically upon connection to the mains.
25
2.048-MBPS SHORT-RANGE DRIVER
4. Installing the 19" Card Versions
in the RackNest 2/14
This chapter describes the 2.048-Mbps Short-Range Driver card version, designed
for installation in the RackNest 2/14 (RM110A or RM110A-2PS).
4.1 The RackNest 2/14
The RackNest 2/14 holds one or two power supplies and any combination of up to
14 plug-in cards. For each of the 14 cards, the rear panel (see Figure 4-1) contains
a male connector for the terminal block and a DB25 connector. A protection cover
protects the terminal block connectors.
4.1.1 LINE CONNECTOR
The terminal block (see Figure 4-1) attaches to the rear-panel terminal block
connectors. It contains screws for connecting the transmit and receive pairs and
ground, if present. When operating the driver with an unbalanced E1 interface,
use an adapter that converts the terminal block connector into two coaxial BNC
connectors (see Figure 4-1).
4.1.2 DB25 DTE CONNECTOR
The DB25 female interface connector provides all interface signals for the digital
interfaces. Modems with X.21 or V.35 interfaces require an external mechanical
adapter. Two optional interface attachments, CIA/X21/1 and CIA/V.35/1, can be
ordered separately. CIA/X.21/1 converts one DB25 connector to an X.21 15-pin
connector. CIA/V.35/1 converts one DB25 connector to a V.35 34-pin connector.
V.36 modem cards are supplied with an adapter cable, which converts between the
DB25 connector and a V.36 37-pin connector.
The card with one of the Ethernet interfaces uses an interface adapter that
converts one DB25 connector to an RJ-45 connector.
The adapter cable and interface attachments are shown in Figure 4-1.
26
CHAPTER 4: Installing the 19" Card Versions in the RackNest 2/14
BNC
Terminal
connectors
block
Figure 4-1. RackNest 2/14 rear panel.
4.2 Power Supply
Power is supplied to the 2.048-Mbps Short-Range Driver card from the RackNest
2/14 power supply via the chassis. Each 2.048-Mbps Short-Range Driver card has
two fuses (F1 and F2) that protect the entire system against power failure resulting
from a short circuit in one card. The rating of the fuses is 1 A, 250 V, slow-blow
(see Figure 4-4).
The RackNest 2/14 can accept both AC or DC power supplies. LED indicators
located on the RackNest’s front panel show activity when the power supply is
connected to the mains plug. The power supply supports the full card cage with
any combination of cards.
NOTE
The RackNest has no power switch. Operation starts when the power is
applied to the rear panel Power connector. When applying power, first
connect the plug of the power cord to the RackNest’s Power connector
and then to the mains power source (outlet).
4.2.1 AC SUPPLY
The RackNest 2/14’s AC power supply is 100, 115, or 230 VAC, ±10%, and 47 to
63 Hz.
27
2.048-MBPS SHORT-RANGE DRIVER
4.2.2 POWER SUPPLY WITH REDUNDANCY
The RM110A-2PS is equipped with two separate power supplies, operating together
and sharing the load of the whole card cage. If either of the power supplies fails,
the other one will continue to supply power to the full card cage.
Two LED indicators show activity of each power supply. They should both light
when mains power is provided.
NOTE
It is possible to combine AC and DC power supplies in the same cage.
4.3 The 2.048-Mbps Short-Range Driver Card’s Front Panel
Figure 4-2 shows the card’s front panel. The LEDs and buttons on the card are
identical to those on the standalone versions. For more on the LEDs and buttons,
refer to Chapter 3.
Figure 4-2. The Card’s front panel.
28
CHAPTER 4: Installing the 19" Card Versions in the RackNest 2/14
4.4 Installing the Card
4.4.1 SETTING INTERNAL JUMPERS AND SWITCHES
The 2.048-Mbps Short-Range Driver card’s switches are the same as the standalone
version’s switches. The configuration DIP switches are located on the print side of
the modem card. The J5 jumper is located on the component side of the card; it is
identical to the J4 jumper of the standalone driver. For the details on the
configuration DIP-switch settings, refer to Figure 3-1 and Table 3-1. Figure 4-3
shows the card’s printed circuit board (PCB) layout.
Figure 4-3. Card PCB layout, component side.
29
2.048-MBPS SHORT-RANGE DRIVER
4.4.2 INSTALLING THE CARD IN THE RACKNEST 2/14
1. Install the RackNest 2/14 in the 19-inch rack.
2. Slide the card into one of the RackNest’s slots.
3. Gently push the card into the cage until it finally connects with the edge
connector inside the rack. (See Figure 4-4.)
4. Tighten the screws on the card’s front panel.
Figure 4-4. The RackNest 2/14’s front panel.
4.4.3 CONNECTING THE INTERFACES
The Card uses the RackNest’s rear panel terminal block ports for the line
connections. The DB25 female connector serves as a DTE port.
1. Remove the protective covers from the terminal block connectors.
2. Connect the terminal block to the RackNest’s terminal block connectors.
30
CHAPTER 4: Installing the 19" Card Versions in the RackNest 2/14
3. Connect the line to the terminal block as follows: connect transmit pair to the
terminals marked XMT, the receive pair to the terminals marked RCV, and
the fifth screw to ground.
4. When operating the card with an unbalanced interface, you will need an
adapter that converts the terminal block connector into two coaxial BNC
connectors.
5. If required, attach the appropriate V.36 adapter cable to the DB25 connector
on the card cage’s rear panel.
6. Connect the DTE cable to the DB25 connector.
7. Connect power to the RackNest.
• To connect AC power, see Section 4.2.
31
2.048-MBPS SHORT-RANGE DRIVER
5. Operation
The installation procedures in Chapter 3 or 4 must be completed before you
attempt to operate the driver.
5.1 Front-Panel Controls and Indicators
Figure 5-1 shows the driver’s front panel. Table 5-1 lists controls, indicators, and
their functions.
Figure 5-1. Front-panel view of the 2.048-Mbps Short-Range Driver.
Table 5-1. Controls and indicators.
Name
Type
Function
PWR
Green LED
ON—Power is on.
RTS
Yellow LED
ON—The DTE activates Request to Send.
TD
Yellow LED
ON—Steady SPACE is being transmitted.
Blinking—Data is being received.
RD
Yellow LED
ON—Steady SPACE is being received.
Blinking—Data is being received.
32
DCD
Yellow LED
ON—A valid receive signal is present.
TST
Red LED
ON—The driver is in any of the three loopback
modes, or when PATT is pressed.
CHAPTER 5: Operation
Table 5-1 (continued). Front panel controls and indicators.
Name
Type
Function
ERR
Yellow LED
ON or blinks if errors are present in the test
pattern.
Lights up momentarily when PATT is pressed.
DIG
Button
The digital loopback pushbutton causes the local
driver to loop received data to its transmitter.
Data Set Ready changes to OFF.
ANA
Button
The local loopback (V.54 loop 3) pushbutton
causes the local driver to loop its transmitter
output back to its receiver. The transmitter
continues to send data to the line. This loopback
may also be activated from the DTE when the
ALBE section of the SW3 switch is set to ON.
REM
Button
The remote digital loopback (V.54 loop 2)
pushbutton causes the remote driver to loop
received data back to its transmitter. Data Set
Ready changes to OFF. This loopback may also
be activated from the DTE when the RLBE
section of the SW3 switch is set to ON.
PATT
Button
The PATT pushbutton causes the driver to send
and receive a 511 test pattern. If errors are
encountered, the ERR indicator lights up.
Receive Data and Clear to Send changes to
OFF. The RD LED turns off.
33
2.048-MBPS SHORT-RANGE DRIVER
5.2 Operating Procedure
5.2.1 POWERING ON THE DRIVER
The driver is powered on as soon as power is connected. The PWR indicator will
light up and remain lit as long as the driver receives power.
The driver requires no operator attention once installed, with the exception of
occasional monitoring of front-panel indicators. Intervention is only required
when:
• The driver must be adapted to new operational requirements.
• Diagnostic loopbacks are performed.
5.2.2 NORMAL INDICATIONS
If the local and remote 2.048-Mbps Short-Range Drivers are in operation and
transmitting/receiving data, the following indicator conditions exist:
• PWR: ON
• RTS: ON
• TD: Flashing or OFF
• RD: Flashing or OFF
• DCD: ON
• TEST: OFF
If the above LED indications are not obtained following initial power on, make
sure none of the buttons are pressed in. If that doesn’t work, refer to Chapter 6 for
diagnostic test instructions.
5.2.3 POWERING OFF THE DRIVER
To power off the 2.048-Mbps Short-Range Driver, remove the power cord from the
power source.
34
CHAPTER 6: Troubleshooting and Diagnostics
6. Troubleshooting and Diagnostics
This chapter contains procedures for performing system diagnostic tests for the
2.048-Mbps Short-Range Driver. Use the test procedures to:
• Verify normal system operation,
• isolate faulty equipment, and
• identify other sources of system malfunction.
Tests are activated by the buttons on the driver’s front panel and are monitored via
LED indicators. For a description of the driver’s controls and indicators and their
functions, see Chapter 5.
6.1 V.54 Loopback Tests
The driver supports several types of loopbacks for evaluating the operation of the
data system equipment and line circuits. Use them to test a) communication
between the attached equipment or b) internal circuitry of the local and remote
drivers.
Loopback tests are best performed in the following order:
1. Local analog loopback
2. Remote digital loopback
3. Local digital loopback
Before testing the operation of the data system equipment and line circuits, make
sure that all units are powered up and configured normally.
NOTE
If you want to perform the LLB and remote digital loopback tests via the
DTE interface pins, make sure that the ALBE and RLBE sections of the
SW3 DIP switch are set to ON (see Figure 3-1 and Table 3-1). The
loopback activation via the DTE pins is not available for the X.21 and
G.703 interfaces.
35
2.048-MBPS SHORT-RANGE DRIVER
6.1.1 LOCAL ANALOG LOOPBACK (LLB)
The local analog loopback (LLB) test checks the performance of the local driver,
the local data terminal, and the connections between them (see Figure 6-1). The
test is performed separately at both the local and remote sites.
Figure 6-1. Local Analog Loopback.
• Press the ANA button. The TEST LED on the driver’s front panel lights. The
driver transmit output is now connected to its own receiver.
• Execute the local analog loopback with one of the following methods:
Using the DTE and checking the echoed data stream, or
Using an external BER tester.
If the BER test indicates an error-free data stream, but the DTE test indicates a
fault, verify that the cable between the DTE and the driver is properly
connected. If the problem persists, follow the DTE manufacturer’s procedures.
To isolate a communication line problem, perform the LLB loopback at the
opposite end. If both LLB tests are error-free, the fault is probably in the
communication line or in the line interfaces.
After completing the test or correcting the fault, press the ANA button again to
restore it to the OFF position.
36
CHAPTER 6: Troubleshooting and Diagnostics
6.1.2 REMOTE DIGITAL LOOPBACK
The remote digital loopback test checks the performance of the local and remote
drivers and their connecting lines. The remote digital loopback sets a loop at the
remote driver from the DTE coupled to the local unit (see Figure 6-2).
Figure 6-2. Remote Digital Loopback.
1. Press the REM pushbutton on the local driver’s front panel.
The following LEDs are ON:
• Local unit: TEST, DCD, RTS, TD, and RD
• Remote unit: TD and RTS
2. Perform the BERT test as explained in Section 6.1.1 for the local analog
loopback test.
3. After completing the test or correcting the fault, press the REM button again
to restore it to the OFF position.
37
2.048-MBPS SHORT-RANGE DRIVER
6.1.3 LOCAL DIGITAL LOOPBACK (DIG)
The local digital loopback (DIG) test allows the operator at the remote end to
check the performance of the local and remote drivers and their connecting lines.
The DIG test loops the received data back to the remote driver (see Figure 6-3).
The local digital loopback test is equivalent to activating the remote loopback from
the remote driver.
Figure 6-3. Local Digital Loopback.
Press the DIG pushbutton on the local driver’s front panel.
The following LEDs are ON:
• Local unit: TEST, RTS, and TD
• Remote unit: DCD, RTS, TD, and RD
NOTE
You can activate the local digital loopback by running remote digital
loopback at the remote unit. If the V54E section of the SW3 DIP switch is
set to ON, the local driver closes the DIG loopback when it detects the
RLB activation at the remote end.
6.2 Internal BERT
The driver has a built-in BERT circuit that consists of a pattern generator and a
pattern tester. This circuit works in conjunction with the V.54 diagnostic loops and
the remote BERT to verify normal system operation and identify faulty equipment
in the event of the system failure.
38
CHAPTER 6: Troubleshooting and Diagnostics
The pattern transmitted by the BER system can be looped back for comparison
(modem self-test, Section 6.2.1) or can be received by another driver (Two-BER
test, Section 6.2.2).
When used opposite another driver, the complete link can be tested either when
the PATT button is pressed, or with external BERT transmitting the same 511-bit
pattern.
6.2.1 MODEM SELF-TEST
The test verifies that the modem is operating correctly (see Figure 6-4).
1. Press the ANA button. The TEST and DCD LEDs light.
2. Press the PATT pushbutton. Verify that the TEST LED is lit and the ERR LED
lights up momentarily.
If errors are encountered, the ERR LED will light (for continuous errors) or blink
(for intermittent errors). Call Tech Support; the driver is faulty and should be
replaced. If the test executes correctly, restore all buttons and switches to their
normal positions.
Figure 6-4. Modem self-test.
39
2.048-MBPS SHORT-RANGE DRIVER
6.2.2 TWO-BER TEST
The Two-BER test checks the link between the two DTEs (Figure 6-5).
Press the PATT button on both the local and remote drivers.
If errors are encountered, the ERR LED will light (for continuous errors) or blink
(for intermittent errors). Call Tech Support; the driver is faulty and should be
replaced.
Figure 6-5. BER system test (two-BER test).
6.3 Calling Black Box
If you determine that your 2.048-Mbps Short-Range Driver is malfunctioning,
do not attempt to alter or repair it. Contact Black Box Technical Support at
724-746-5500. The problem might be solvable over the phone.
Before you do, make a record of the history of the problem. Your supplier will be
able to provide more efficient and accurate assistance if you have a complete
description, including:
• The nature and duration of the problem.
• When the problem occurs.
• The components involved in the problem.
• Any particular application that, when used, appears to create the problem or
make it worse.
40
CHAPTER 6: Troubleshooting and Diagnostics
6.4 Shipping and Packaging
If you need to transport or ship your 2.048-Mbps Short-Range Driver:
• Package it carefully. We recommend that you use the original container.
• Before you ship a unit for repair or return, contact Black Box
to get a Return Authorization (RA) number, and make sure you include
everything you received with the unit when you ship it.
41
2.048-MBPS SHORT-RANGE DRIVER
Appendix. Interface
Connector Wiring
A.1 Pin Assignments for V.24, V.35, X.21, and RS-530 DTE Interfaces
Table A-1. DTE interface signal assignments.
Signal
RS-232
V.35
Function DB25
DB25 34-Pin DB25
StandCard Standalone
alone and Cage
Card Cage
Pin
Circuit
Protective 1
Ground
Signal
Ground
7
Transmitted
Data
Received 3
Data
42
2
RS-530
DB25
DB25
Standalone Card
and Card
Cage
Cage
Pin Circuit
X.21
DB15
Standalone
1
1
7
8
Pin
1
A
Frame 101
1
7
B
Signal 102
GND
7
AB
9
11
P
S
TD(A) 103
TD(B) 103
2
14
BA(A) 2
BA(B) 14
2
9
12
13
R
T
RD(A) 104
RD(B) 104
3
16
BB(A) 3
BB(B) 16
4
11
Description
Circuit
—
Chassis ground
(Shield) may be isolated
from signal
ground.
—
(GND)
Common signal
and DC power
supply ground.
T(A) Serial digital
T(B) data from DTE.
(Transmit) In sync applications, the
data translations
must occur on
the rising edge
of the transmit
clock.
R(A)
R(B)
Serial output
from the modem
receiver. In sync
applications, the
data translations
occur on the
rising edge of
the clock.
APPENDIX: Interface Connector Wiring
Table A-1 (continued). DTE interface signal assignments.
Signal RS-232
V.35
Function DB25
DB25 34-Pin DB25
StandCard Standalone
alone and Cage
Card Cage
Pin
Circuit
RS-530
DB25
DB25
Standalone Card
and Card
Cage
Cage
Pin Circuit
X.21
DB15
Standalone
Pin
Circuit
Request 4
to Send
4
C
RTS 105
4
19
CA(A) 4
CA(B) 19
3
10
C(A)
C(B)
Clear to
Send
5
5
D
CTS 106
5
13
CB(A)
CB(B)
A positive level
from the driver
when power is
on, and the
driver is (a) not
in digital loop
mode, or (b) has
not received a
remote loopback
signal from the
remote unit.
Data
Terminal
Ready
20
20
H
DTR 108
20
23
CD(A)
CD(B)
Not used.
Carrier
Detect
8
8
F
DCD 109
8
10
CF(A) 8
CF(B) 10
5
I(A)
12
I(B)
(Indication)
A positive level
from the driver,
except when a
loss of the
received signal
is detected or
when Data Set
Ready is
negative.
19
16
U
W
24
11
DA(A) 24
DA(B) 11
7
14
A serial data
rate clock input
from the data
source. Positive
clock translations must
correspond to
data transmissions.
External 24
Transmit
SCTE(A)113
SCTE(B) 113
(A)
(B)
Description
A positive
level to driver
when data
transmission is
desired.
43
2.048-MBPS SHORT-RANGE DRIVER
Table A-1 (continued). DTE interface signal assignments.
Signal RS-232
V.35
Function DB25
DB25 34-Pin DB25
StandCard Standalone
alone and Cage
Card Cage
Pin
Circuit
RS-530
X.21
DB25
DB25 DB15
Standalone Card
Standalone
and Card
Cage
Cage
Pin Circuit
Pin Circuit
Transmit 15
Clock
14
10
Y
a
SCT(A) 114 15
SCT(B) 114 12
DB(A) 15
DB(B) 12
Receive 17
Clock
23
22
V
X
SCR(A) 115
SCR(B) 115
DD(A)
DD(B)
Local
Analog
Loop
18
18
L and j 18
LL
A control signal
input, which,
when on, sets
the driver into
Local Analog
Loopback (V.54
Loop 3).
Remote
Digital
Loop
21
21
N and h 21
RL
A control signal
input which,
when on,
commands the
driver to send a
Remote
Loopback
command (V.54
Loop 2) to the
remote driver.
Test
25
Indicator
25
n and k 25
TM
A control signal
output from the
driver; positive
during any test
mode.
44
17
9
6
S(A)
13
S(B)
(Signal Timing)
Description
A transmit data
rate for use by
an external data
source. Positive
clock translations correspond to data
translations.
A receive data
rate clock output
used by an
external data
sink. Positive
clock translations correspond to data
translations.
APPENDIX: Interface Connector Wiring
A.2 V.36 Interface Converter
The V.36 interface is provided via an adapter cable converting between a 25-pin
RS-530 connector and a 37-pin V.36 connector. Table A-2 lists the cable wiring.
Table A-2. Pin assignments for cable converting between RS-530 and
V.36 interfaces.
Signal Function
V.36
Pin
Circuit
RS-530
Pin
Circuit
Protective
Ground
1
Shield
1
—
Signal Ground
19
SG
7
AB
DTE Common
Return
37
SC
—
—
DCE Common
Return
20
RC
—
—
Transmitted
Data
4
22
SD(A)
SD(B)
2
14
BA(A)
BA(B)
Received
Data
6
24
RD(A)
RD(B)
3
16
BB(A)
BB(B)
Request to
Send
7
25
RS(A)
RS(B)
4
19
CA(A)
CA(B)
Clear to Send
9
27
CS(A)
CS(B)
5
13
CB(A)
CB(B)
Data Set Ready 11
29
DM(A)
6
CC(A)
DM(B)
22
CC(B)
Data Terminal
Ready
TR(A)
TR(B)
20
23
CD(A)
CD(B)
12
30
45
2.048-MBPS SHORT-RANGE DRIVER
Table A-2 (continued). Pin assignments for cable converting between
RS-530 and V.36 interfaces.
Signal Function
V.36
Pin
Circuit
RS-530
Pin
Circuit
Carrier Detect
13
31
RR(A)
RR(B)
8
10
CF(A)
CF(B)
External
Transmit Clock
17
35
TT(A)
TT(B)
24
11
DA(A)
DA(B)
Transmit Clock
5
23
ST(A)
ST(B)
15
12
DB(A)
DB(B)
Receive Clock
8
26
RT(A)
RT(B)
17
9
DD(A)
DD(B)
Local Analog
Loopback
10
LL
18
LL
Remote
Loopback
14
RL
21
RL
Test Indicator
18
TM
25
TM
A.3 DB15 Line Connector (Standalone Driver)
The line interface of the standalone driver may terminate in a DB15 female
connector, wired in accordance with Table A-3.
Table A-3. DB15 line connector pin assignment.
Pin
Function
11
3
9
1
Receive (data in)
Receive (data in)
Transmit (data out)
Transmit (data out)
46
© Copyright 2003. Black Box Corporation. All rights reserved.
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•
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•
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•
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