Black Box ME560A-V35-F User manual

Limited-Distance Modem 56/64
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]
JULY 1998
ME560A-V35-F ME561A-V35-M
ME560AE-V35-F ME561AE-V35-M
ME560A-V35-M ME562A
ME560AE-V35-M ME562AE
ME561A-V35-F ME563A
ME561AE-V35-F ME563AE

1
LIMITED-DISTANCE MODEM 56/64
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 J of Part 15 of FCC rules,
which are designed to provide reasonable protection against such interference
when the equipment is operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause interference, in which case
the user at his own expense will be required to take whatever measures may be
necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.

2
LIMITED-DISTANCE MODEM 56/64
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.

3
LIMITED-DISTANCE MODEM 56/64
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.
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
LIMITED-DISTANCE MODEM 56/64
IMPORTANT
North American Users: The Limited-Distance Modem
56/64 is powered by an external power supply. To
reduce the risk of electric shock, fire, and injury to
persons:
• Use only with a UL listed and CSA Certified
Class 2 power supply rated 9 VDC, 400 mA.
IMPORTANT
Pour les utilisateurs Nord Americains: Le Limited-
Distance Modem 56/64 est renforcé par un
transformateur exterieur. Afin de réduire le risque
d’electrocution, de feux ou de blessure:
• Utilisier seulement avec le UL listé et le CSA
Certifié Classe 2 de le transformateur de 9 VDC,
400 mA.

5
LIMITED-DISTANCE MODEM 56/64
TRADEMARKS USED IN THIS MANUAL
Any trademarks mentioned in this manual are acknowledged
to be the property of the trademark owners.

6
LIMITED-DISTANCE MODEM 56/64
CONTENTS
Chapter Page
1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3 Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2 Sync Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3 Async Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.4 Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7
LIMITED-DISTANCE MODEM 56/64
1. Specifications
Data Rates—56 or 64 kbps, selectable
Number of Data Bits (Async Mode)—8, 9, 10, or 11,
including 1 start and 1 stop bit, with or without
parity
Frequency Allowance (Async Mode)—Shortening
of the stop bit on the receive end is selectable:
• 12.5% allows a frequency difference between the
async DTE and the Modem of -2.5% to +1.0%
• 25% allows a frequency difference of -2.5% to
+2.3%
Transmission Line—4-wire unconditioned
dedicated line (two twisted pairs)
Transmission Mode—Sync or Async, full-duplex
Transmission Controls—
• DCD (Circuit 109) turns ON after recognizing
a receive signal from the line.

8
LIMITED-DISTANCE MODEM 56/64
• CTS (Circuit 106) turns ON 8 msec after DTE
raises RTS (Circuit 105).
• DSR (Circuit 107) turns ON when the modem is
powered and is in normal mode or in analog loop
state. DSR turns OFF when the modem is in digital
loopback state.
• TEST Mode (Circuit 142) turns ON when the
modem is in a diagnostic loop.
Transmission Level—0 dBm
Maximum Distance—19 AWG: 6 mi. (10 km);
24 AWG: 2.8 mi. (4.5 km); 26 AWG: 2 mi. (3.2 km)
Terminal Interface—EIA RS-232 V.24 integral DB25
female connector; V.35 interface is provided via a
mating cable, 17.5" (45 cm) long, terminated with
a 34-pin male or female connector for V.35
Line Interface—5-screw (4-wire and ground)
terminal block together with RJ-11 or RJ-45 jack,
mounted directly
Controls—Control loopback activity: Normal, ANA
(analog), and REM (remote digital loopback)

9
LIMITED-DISTANCE MODEM 56/64
Indicators—(4) LEDs: Power, TST (Test), CD
(Carrier Detect), TD (Transmit Data)
Interface—ME560A-ME561A: V.35;
ME562A-ME563A: RS-232
Connectors—All models: (1) DB25, (1) terminal
block;
ME560A-F: (1) RJ-45 female, pigtail cable with
M/34 female;
ME560A-M: (1) RJ-45 female, pigtail cable with
M/34 male;
ME561A-F: (1) RJ-11 female, pigtail cable with
M/34 female;
ME561A-M: (1) RJ-11 female, pigtail cable with
M/34 male;
ME562A: (1) RJ-11 female;
ME563A: (1) RJ-45 female
Temperature—32 to 122°F (0 to 50°C)
Humidity—Up to 90%, noncondensing
CE Approval—220-VAC versions;
ME560AE-ME563AE

10
LIMITED-DISTANCE MODEM 56/64
Power— -A versions: wall-mounted 9-VDC, 115-VAC
power supply; -AE versions: wall-mounted 9-VDC,
230-VAC power supply
Size—1.2"H x 2.1"W x 5.1"D (3 x 5.3 x 13 cm)
Weight—3.3 oz. (90 g)

11
LIMITED-DISTANCE MODEM 56/64
2. Introduction
2.1 Description
The Limited-Distance Modem is used for local data
distribution, connecting full-duplex sync or async DTEs,
computers, or controllers over unconditioned 4-wire
dedicated lines. The Modem operates at data rates of 56
or 64 kbps, at distances of up to 6 miles (10 km),
according to the wire gauge and data rate (see
Table 2-1).
Table 2-1. Approximate Range.
Data Rate 19 AWG 24 AWG 26 AWG
(0.9 mm) (0.5 mm) (0.4 mm)
kbps km miles km miles km miles
56/64 10 6 4.5 2.8 3.2 2
Six models are available in both 115-VAC and
220-VAC versions:
• Limited-Distance Modem 56/64, V.35, RJ-45
female, M/34 female (ME560A-V35-F)
• Limited-Distance Modem 56/64 V.35, RJ-45
female, M/34 male (ME560A-V35-M)

12
LIMITED-DISTANCE MODEM 56/64
• Limited-Distance Modem 56/64 V.35, RJ-11
female, M/34 female (ME561A-V35-F)
• Limited-Distance Modem 56/64 V.35, RJ-11
female, M/34 male (ME561A-V35-M)
• Limited-Distance Modem 56/64 RS-232, RJ-11
female (ME562A)
• Limited-Distance Modem 56/64 RS-232 RJ-45
female (ME563A)
Each model has a DB25 connector for the DTE
interface. For the V.35 interface, a 17.7-in. (45-cm) cable
is supplied, with a DB25 female connector on one side
and a 34-pin male or female connector on the other
side.
Four LED indicators are available to facilitate
diagnostics: Power, Test, Data Carrier Detect, and
Transmit Data.
Transmit timing is provided via three sources: an
internal oscillator, an external clock, or a loopback
clock derived from the receive signal.

13
LIMITED-DISTANCE MODEM 56/64
The Modem’s carrier is strap-selectable for either
continuous operation, or switched operation for passing
control signals end-to-end. Switched operation is
controlled by the RTS signal.
The Modem performs diagnostic loops in compliance
with the ITU V.54 standard. Two V.54 loops are
available: local analog loop (V.54, loop 3) and remote
digital loop (V.54, loop 2). The loops are activated by a
3-position switch in all models or by the DTE interface
Circuit 141 (Pin 18) and Circuit 140 (Pin 21). The Test
LED lights when any diagnostic loop is active.
The low transmit level minimizes crosstalk onto
adjacent circuits within the same cable. Data is
transmitted and received using a balanced interface,
ensuring high immunity to circuit noise. And the
Modem is coupled to the dedicated line through
isolation transformers which, in conjunction with other
circuitry, protect against AC or DC overvoltages.
The line interface consists of two independent
connectors: a 5-screw terminal block, and a selectable
RJ-11 or RJ-45 connector.

14
LIMITED-DISTANCE MODEM 56/64
Power is supplied from a standard, wall-mounted wall-
mounted power supply, 300-mA (center: positive; sleeve:
negative).
2.2 Features
• Synchronous or asynchronous
• Data rates of 56 or 64 kbps, selectable
• V.54 diagnostics, including local and remote test
• Internal, external, or receive clock
• Transmission range of up to 6 miles (10 km)
• Controlled or continuous carrier
• Isolation transformers
• V.35 or V.24/RS-232 interfaces
• LED indicators
• Miniature, lightweight, easy to install
• Operates with an external, wall-mounted power
supply

15
LIMITED-DISTANCE MODEM 56/64
2.3 Application
Figure 2-1 shows a typical application of the Limited-
Distance Modem 56/64.
Figure 2-1. Typical Application.
IBM 37X5
IBM 3174
ME562A ME562A

16
LIMITED-DISTANCE MODEM 56/64
3. Installation
CAUTION
This is a delicate instrument. Be careful not to break or
shake any components whenever you have the Modem’s
case open.
Installing the Modem is simple and straightforward.
Follow these steps:
1. Open the unit by separating the two parts of the
plastic cover. Press the marked points indicated
on the sides.
2. Strap the modem according to the Strapping
Diagram (see Figure 3-1) and the Strap Selection
table (see Table 3-1).
Figure 3-1. Strapping Diagram.
No. of bits (ASYNC)
Stop Bit (ASYNC)
Data Rate
Transmit Timing
ON
1223456 78910
ON
Carrier
Loop Control RJ
XMT
GND
RCV

17
LIMITED-DISTANCE MODEM 56/64
Table 3-1. Strap Selection.
Strap Function Position Factory
Identity Setting
XMT Selects timing S1 S2 S3
Timing clock and Async ON OFF OFF External
mode OFF OFF OFF Internal*
OFF OFF ON Receive
OFF ON OFF Async
Baud Selects data S4
Rates transmit rate
(kbps) ON—56 kbps
OFF-64 kbps 64
Async Selects the S5
Length amount of stop
bit shortening ON—12.5%
to be used in OFF—25% 25%
Async mode
Selects character S6 S7 No. Bits
length in Async OFF OFF 8
mode OFF ON 9
ON OFF 10 10 bits
ON ON 11
Carrier Selects carrier S8
constantly on, or
controlled by RTS ON ON ON
OFF CNT
Loop ANA Enables S9
Activation DTE control of
from DTE analog loop ON Enable
interface OFF Disable Disable
REM Enables S10
DTE control of ON Enable
remote digital OFF Disable Disable
loop
*The factory setting for XMT Timing is Internal.

18
LIMITED-DISTANCE MODEM 56/64
3. Connect the 4-wire dedicated line to the modem
line connector.
• If you’re using the terminal block, connect each
lead of the 4-wire dedicated line to the
appropriate screw connector on the terminal
block.
• If you’re using the RJ-11 or RJ-45 connector, plug
the cable into the RJ jack.
• Verify that the connection between the local
modem and the remote modem is as follows:
- Local XMT connected to remote RCV
- Local RCV connected to remote XMT
NOTE
When operating in a noisy environment, we recommend
that you use shielded cables, and connect the cable shield
to “Ground.” Ground is provided on the line connector
(terminal block or RJ-11/RJ-45 connectors) for this purpose.
If you’re connecting to the RJ-11 and RJ-45 jack, refer to
Figures 3-2 and 3-3 for connector pinouts.

19
LIMITED-DISTANCE MODEM 56/64
Figure 3-2. RJ-11 Pin Assignment.
Figure 3-3. RJ-45 Pin Assignment.
4. Close the unit by pressing the two parts of the
cover together.
1 8
8
1
1 6
6
1
6 NC
5 Receive +
4 Transmit +
3 Transmit -
2 Receive -
1 GND
RJ-11 jack (female)
external view
RJ-11 plug (male)
Clip at rear
8 NC
7 NC
6 Receive +
5 Transmit +
4 Transmit -
3 Receive -
2 GND
1 NC
RJ-45 jack (female)
external view
RJ-45 plug (male)
Clip at rear