Black Box MT760A-232/232 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]
JANUARY 2004
MT760A-232/232
MT760A-232/V35
MT760A-V35/V35
MT760A-X21/X21
MT760A-530/530
MT760A-530/232
MT760A-DDS/232
MT760A-DDS/V35
FradSwitch A/S 3 Port

3
FCC/IC STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION
AND
CANADIAN DEPARTMENT OF COMMUNICATIONS
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 the Canadian Department of
Communications.
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 le ministère des Communications du Canada.
EN 55022 Warning: This is a Class A product. In a domestic environment, this
product might cause radio interference, in which case the user might be required
to take adequate measures.

4
FRADSWITCH A/S 3 PORT
TELECOMMUNICATION SAFETY STATEMENTS
Always observe standard safety precautions during installation, operation, and
maintenance of this product. Only a qualified and authorized service personnel
should carry out adjustment, maintenance, or repairs to this instrument. No
adjustment, maintenance, or repairs should be performed by either the operator
or the user.
The safety status of each of these ports on the Fradswitch A/S 3 Port is declared
according to EN 41003 and is detailed in the table below:
Safety Status Ports
SELV RS-232/V.24, RS-530, V.35, X.21, LAN
TNV-1 DDS
SELV = Safety Extra-Low Voltage
TNV-1 = Telecommunications Network Voltage operating within the limits of
SELV and subject to overvoltages

5
DECLARATION OF CONFORMITY (CE)
DECLARATION OF CONFORMITY (CE)
The manufacturer declares that the Fradswitch A/S 3 Port conforms to the
following standards:
EMC: EN 55022 (1994) Limits and methods of measurement 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 (1992/93) Safety of information-technology equipment,
including electrical business equipment.
The Fradswitch A/S 3 Port herewith complies with the requirements of the EMC
Directive 89/336/EEC and the Low Voltage Directive 73/23/EEC. The Fradswitch
was tested in a typical configuration.

6
FRADSWITCH A/S 3 PORT
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.

7
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.

8
FRADSWITCH A/S 3 PORT
Contents
Chapter Page
1. Specifications ........................................................................................... 10
1.1 The Main-Link Ports (All Numbered Ports Except
Port 1 on “-DDS” Models) ............................................................ 10
1.2 The DDS Port (Port 1 on “-DDS” Models Only) ............................. 11
1.3 The Control Port ............................................................................... 11
1.4 The Unit As a Whole ........................................................................ 12
2. Introduction ............................................................................................. 13
3. Configuration and Installation ............................................................... 14
3.1 The Complete Package ..................................................................... 14
3.2 Site Requirements ............................................................................. 15
3.3 Hardware Configuration .................................................................. 16
3.3.1 Accessing the PCBs ................................................................. 17
3.3.2 The Jumpers on the Main Circuit Board ............................... 17
3.3.3 The Jumper Banks on the Interface Boards .......................... 19
3.4 Installing a Switch in a 19" Rack (Optional) ................................... 20
3.5 Attaching Cables to the Switch ......................................................... 21
3.5.1 Connecting to the Control Port ............................................. 21
3.5.2 Connecting to the DDS Port .................................................. 21
3.5.3 Connecting to the Non-DDS Main-Link Ports ...................... 22
3.5.4 Connecting AC Power ............................................................. 23
4. Operation ................................................................................................. 24
4.1 The Switch’s Controls, Indicators, and Connectors ....................... 24
4.1.1 Front-Panel Components ....................................................... 24
4.1.2 Rear-Panel Components ......................................................... 26
4.2 Basic Operating Instructions and Indications ................................. 27
4.2.1 Power-Up ................................................................................. 27
4.2.2 Normal Operation .................................................................. 27
4.2.3 Power-Down ............................................................................. 27
4.3 Upgrading the Switch’s Firmware .................................................... 28

9
TABLE OF CONTENTS
Chapter Page
5. Troubleshooting ...................................................................................... 31
5.1 Things to Try First ............................................................................. 31
5.2 Calling Black Box .............................................................................. 31
5.3 Shipping and Packaging ................................................................... 32
Appendix: Connector Pinouts ....................................................................... 33
A.1 The RS-232 Interfaces ....................................................................... 33
A.2 The RS-530 Interface ........................................................................ 34
A.3 The V.35 Interface ............................................................................ 35
A.4 The X.21 Interface ............................................................................ 36
A.5 The DDS Interface ............................................................................ 36

10
FRADSWITCH A/S 3 PORT
1. Specifications
1.1 The Main-Link Ports (All Numbered Ports Except Port 1 on “-DDS” Models)
Interfaces — Models with “232” in their product code:
EIA/TIA RS-232 (ITU-T V.24/V.28);
Models with “530” in their product code: EIA/TIA RS-530;
Models with “V35” in their product code: ITU-T V.35;
Models with “X21” in their product code: ITU-T X.21;
All either DTE or DCE (user-selectable)
Protocols — X.25, Frame Relay, HDLC, STM (proprietary), IP/SLIP,
or async (user-selectable):
X.25: Complies with ITU-T X.25 (1988), LAP-B;
Frame Relay: Complies with ANSI T1.606, T1.617
Annex D, and T1.618, as well as ITU-T Q.922
Annex A; also supports CLLM, LMI, and ANSI PVC
management protocols;
STM: Compatible with Stat-4 (our product code
MX864A), Stat-8 (MX866A), and Stat-24 (MX868A)
statistical multiplexors;
IP: Supports encapsulation over X.25 (as per
RFC 1356) or Frame Relay (as per RFC 1490), as well
as dialup links for X.25 with X.32 protocols
Packet Size — X.25: Up to 4096 bytes;
Other protocols: Up to 8192 bytes
Clock Source — Internal or recovered (user-selectable)
Data Rate — Any port configured as synchronous: Any data rate that,
when added to the data rates of all other synchronous
main-link ports, does not total more than 2 Mbps;
Any port configured as asynchonous: 115,200, 57,600,
38,400, 19,200, 9600, 4800, 1200, 600, 300, 150, 110, or
75 bps (user-selectable)
Maximum
Distance — Standard maximum for each interface
Connectors — On rear panel:
(2) DB25 female (“-DDS” models) or
(3) DB25 female (all other models);

11
CHAPTER 1: Specifications
Connectors
(continued) — On adapter cables:
For each V.35 port: (1) M/34 female;
For each X.21 port: (1) DB15 female
1.2 DDS Port (Port 1 on “-DDS” Models Only)
Interface — Digital Data Service (DDS) as per AT&T®Pub. 62310
Clock Source — Either internal (transmit) or recovered from line signal
(receive), user-selectable
Data Rate — 4.8, 9.6, 19.2, or 56 kbps, user-selectable
Maximum
Distance — Over 24-AWG (0.6-mm) wire:
6.5 mi. (10.5 km) at 9.6 kbps,
5 mi. (8 km) at 19.2 kbps, or
4 mi. (6.5 km) at 56 kbps;
Attenuation — Up to 43 dB
Transmit
BPV Sequence — Zero suppression
Received
BPV Sequence — Out of service (OOS), out of frame (OOF), DSU
loopback
Connector — (1) Rear-mounted RJ-48 female
1.3 The Control Port
Flow Control — Hardware (RTS/CTS) or software (X-ON/X-OFF), user-
selectable
Data Rate — 38,400, 19,200, 9600, 4800, 1200, 600, 300, 150, 110, or
75 bps (user-selectable)
Maximum
Distance — 50 ft. (15.2 m)
Command
Modes — X.28, extended

12
FRADSWITCH A/S 3 PORT
Terminal
Handling — Enhanced asynchronous (exceeds X.3 requirements)
Connector — (1) Front-mounted RJ-45 female
1.4 The Unit As a Whole
Compliance — FCC Part 15 Subpart J Class A, DOC Class/MDC classe A
User Controls — (1) Front-mounted recessed reset pushbutton;
(1) Internal jumper for power-up configuration loading;
(3) Internal jumper banks for DTE vs. DCE;
“-X21” models only: (3) additional jumpers for DTE vs.
DCE;
Firmware-resident terminal-based configuration menus
Indicators — (11) Front-mounted LEDs:
PWR (unit power); ERR (error); OVF (buffer
overflow); TEST; SYNC 1, 2, and 3 (main-link
synchronization); ACTIV 1, 2, and 3 (main-link data
activity); ACT (control-port data activity)
Power — From AC outlet, through detachable 5-ft. (1.5-m) power
cord and internal transformer:
Nominal Input: 100 to 230 VAC, 47 to 63 Hz;
Input-Voltage Tolerance: 90 to 253 VAC;
Consumption: 30 watts
Temperature
Tolerance — 32 to 122˚ F (0 to 50˚ C)
Humidity
Tolerance — Up to 90% noncondensing
Size — 1.7"H x 8.5"W x 9.4"D (4.2 x 21.5 x 24 cm)
Weight — 2.6 lb. (1.2 kg)

13
CHAPTER 2: Introduction
2. Introduction
The FradSwitch A/S 3 Port provides easy, cost-effective access to a packet-switching
network. It also provides packet-switching capability for both X.25 and Frame
Relay.
The FradSwitch has three ports which support aggregate data rates up to
2 Mbps. Each port can be configured—through a firmware-resident set of
configuration menus that you can access with an attached terminal—to use any of
the following protocols: X.25, Frame Relay, HDLC, STM, asynchronous, or
IP/SLIP. Switching between ports is provided for X.25, Frame Relay, and
encapsulated protocols.
Depending on the model you ordered, the FradSwitch’s ports can be any of
several combinations of EIA/TIA RS-232 (ITU-T V.24) or RS-530 or ITU-T V.35 or
X.21. These physical interfaces can be DCE or DTE (user-configurable). The
“-DDS” models have a DDS interface on port 1 which is always DTE.
The FradSwitch A/S 3 Port supports a wide range of applications. For
information on configuring the FradSwitch’s firmware, refer to the Packet Switching
Guide (call Black Box for a copy if you did not receive one with your FradSwitch).

14
FRADSWITCH A/S 3 PORT
3. Configuration and Installation
The FradSwitch A/S 3 Port is delivered completely assembled. It is designed to be
installed as a desktop unit or mounted in a 19" rack.
After installing the unit, refer to the Packet Switching Guide for system-
configuration information and procedures, as well as for troubleshooting
information (including testing and diagnostics instructions) if you have any
difficulties.
3.1 The Complete Package
The complete FradSwitch A/S 3 Port package includes:
• A FradSwitch A/S 3 Port,
• Its power cord,
• This manual,
• An RJ-45 to DB25 adapter cable for the control port (see Section 3.5.1), and
•V.35 and X.21 models only: An adapter cable for each V.35 or X.21 port to patch
the FradSwitch’s DB25 connector to a V.35-native M/34 connector or an X.21-
native DB15 connector.
If anything is missing or damaged, contact Black Box right away.
NOTE
We suggest that you save the packing material and carton in case it
becomes necessary to store, ship, or return the FradSwitch.

15
CHAPTER 3: Configuration and Installation
3.2 Site Requirements
Power: The FradSwitch A/S 3 Port unit should be installed within 5 ft. (1.5 m) of
an easily accessible, grounded AC outlet capable of furnishing power at the voltage
it needs (100 to 230 VAC).
Control-Port Connections: The FradSwitch A/S 3 Port has an RJ-45 connector for
its asynchronous supervisory-control port (see the Appendix for this port’s pinout).
Main-Link Connections: The FradSwitch A/S 3 Port has three main-link
connectors. What type of connectors these are depends on which interface(s) you
ordered for your Switch:
RS-232: DB25 female
X.21: DB25 female patched to DB15 female with included adapter cable
V.35: DB25 female patched to M/34 female with included adapter cable
RS-530: DB25 female
DDS: RJ-48 female
The pinouts for these interfaces are listed in the Appendix.
Front and Rear Clearance: When the FradSwitch A/S 3 Port is installed in a
19" rack, allow at least 36" (90 cm) of clearance in front of it for operator access
and 4" (10 cm) of clearance behind it for interface-cable connections.
Environment: The ambient temperature in which the FradSwitch A/S 3 Port
operates should be 32 to 122˚ F (0 to 50˚ C), at a relative noncondensing humidity
of not more than 90%.

16
FRADSWITCH A/S 3 PORT
3.3 Hardware Configuration
The FradSwitch A/S 3 Port contains two different types of printed circuit boards,
as shown in Figure 3-1 below. The main board contains most of the FradSwitch’s
circuits, and has two jumpers. Three main-link interface boards carry interface-
specific logic. The following subsections provide information on the functions and
default settings of the internal jumpers, as well as step-by-step instructions for
setting them. (Note that the default settings of the FradSwitch’s jumpers are
usually suitable for most applications.)
All other configuration of the FradSwitch A/S 3 Port is done after you install it,
through its firmware-based “command facility” (menu system). For detailed
instructions, refer to the Packet Switching Guide.
Figure 3-1. The FradSwitch A/S 3 Port’s general component layout.

17
CHAPTER 3: Configuration and Installation
3.3.1 A CCESSING THE
PCB S
CAUTION!
In order to avoid the possibility of electrical shock, always unplug the
FradSwitch A/S 3 Port before opening it.
To access the printed circuit boards of the FradSwitch A/S 3 Port, loosen the
screws on the bottom of the Switch and remove the unit’s top cover. Refer to
Sections 3.3.2 and 3.3.3 and change jumper settings as required. When you’re
finished, replace the Switch’s cover: Gently push it down until it clips into place,
then refasten the screws.
3.3.2 T HE J UMPERS ON THE
M AIN C IRCUIT B OARD
There are several jumpers mounted on the FradSwitch A/S 3 Port’s main circuit
board. On non-X.21 models, only one of these jumpers—JP25—is user-settable; on
X.21 models, so are jumpers JP4, JP5, and JP6. Refer to the descriptions of these
jumpers below, and to Figure 3-2 on the next page. (All other jumpers on the main
circuit board are either for factory functions or are reserved for future use. Do not
change them from their factory-default settings.)
JP25, the INIT/NOR Jumper
Use this jumper to select which set of stored firmware-configuration parameters
the FradSwitch A/S 3 Port will load at power-up and use as its default. The jumper
has two positions:
NOR Normal operation (the factory-default setting). The FradSwitch A/S
3 Port loads and uses the set of parameters mostly recently selected and
saved to NVRAM by a user.
INIT Initialization. The FradSwitch A/S 3 Port loads and uses its original
factory-default configuration. For more information about configuring
the Switch, including the unit’s factory-default settings, refer to the
Packet Switching Guide.
X.21 Models Only: JP3 (BRG3), JP4 (BRG2), and JP5 (BRG1), the X.21 DCE Jumpers:
In their factory-default settings, which are appropriate for operating the
FradSwitch A/S 3 Port’s X.21 ports as DTE interfaces, these jumpers are not
connected. If you want any of the Switch’s X.21 ports to function as a DCE, you’ll
have to connect its jumper here, as well as move its jumper bank to “DCE” on the
interface board (see the next section).
For Link 1 to be DCE, connect the JP5 (BRG1) jumper. For Link 2 to be DCE,
connect the JP4 (BRG2) jumper. For Link 3 to be DCE, connect the JP3 (BRG3)
jumper.

18
FRADSWITCH A/S 3 PORT
Figure 3-2. The jumpers on the FradSwitch A/S 3 Port’s main circuit board
(MT760A-X21/X21 model shown).
EN AUTO
SEL
JP30 J15
J14
JP28
INV
AUTO
NOR
SEL
JP27
JP25
JP21 JP22
JP24
NOR INIT
J13
1
19
2
20
RTS
PB
J1
JP12 JP13 JP14 JP15 JP16 JP17
J2
J3
4M 8M
JP25
JP3,4,5
BRG3 BRG2 BRG1
JP3 JP4 JP5
JP1 JP2
JP6 JP7
ACD
JP8
BRG3 BRG2 BRG1
REV1 REV2 REV3
LINK 2
U1-X21
DTE↔DCE
LINK 3
U1-X21
DTE↔DCE
LINK 1
U1-X21
DTE↔DCE
W.D

19
CHAPTER 3: Configuration and Installation
3.3.3 T HE
J UMPER B ANKS ON THE I NTERFACE B OARDS
The FradSwitch A/S 3 Port’s main-link ports can be any of these interfaces, each of
which is controlled by an interface-specific “interface board” (daughterboard)
mounted on the main circuit board:
• EIA/TIA RS-232 (ITU-T V.24)
• EIA/TIA RS-530
• ITU-T V.35
• ITU-T X.21
• DDS CSU/DSU (Port 1 only)
Each interface board can be configured as DCE or DTE by moving the jumper
bank on that board. The jumper bank, marked “DCE ↔DTE,” consists of
interlinked multiple jumpers that must be moved together, as shown in Figure 3-3
below.
Figure 3-3. A DTE/DCE jumper bank (interface board for an X.21 port
shown).
When a board is set as DTE, the port receives its clock from outside and so must be
firmware-configured for “external clock.” By contrast, when a board is set as DCE,
the port uses the Switch’s own clock and so must be configured for “internal
clock.” (Refer to the Packet Switching Guide for more information.)
U1-X21
DTE↔DCE

20
FRADSWITCH A/S 3 PORT
3.4 Installing a Switch in a 19" Rack (Optional)
The FradSwitch A/S 3 Port can be installed in a 19" rack, where it takes up 1U
(1.75", 4.4 cm) of vertical space. A rackmount kit (our product code LRRACK)
provides the hardware necessary to do this: two long-arm brackets, four screws, and
four washers.
To prepare the Switch for rack installation, attach the two rackmount-kit
brackets to its sides. Each bracket is fastened with two screws and two washers,
inserted into the two front holes on the Switch’s side as shown in Figure 3-4 below
(nuts are already in place, inside the unit). Now fasten the brackets to the side rails
of the rack with four of your own screws (not included), two on each side.
Figure 3-4. Attaching the brackets of the FradSwitch A/S 3 Port’s
rackmount kit.

21
CHAPTER 3: Configuration and Installation
3.5 Attaching Cables to the Switch
The FradSwitch A/S 3 Port has three numbered connectors on its rear panel for its
main device/WAN links (of which, on “-DDS” models, Port 1 will be the dedicated
DDS port), plus an RJ-45 connector on its front panel that serves as the supervisory-
control port. See the Appendix for the pinouts of these ports.
3.5.1 C ONNECTING TO THE C ONTROL P ORT
The FradSwitch A/S 3 Port comes with a 6-ft. (1.8-m) RJ-45 male to DB25 female
adapter cable. You can attach the cable’s RJ-45 plug to the Switch’s control port
and plug its DB25 female connector directly into the DB25 male serial port of most
RS-232 ASCII terminals, older IBM PC compatible computers, and other terminal-
type equipment. Alternatively, with a standard DB25 male to DB9 female adapter,
you can run this cable from the Switch’s control port to the DB9 male serial port of
a newer IBM PC/AT or PS/2 compatible computer.
If you want to attach the control port to a terminal-type device at a greater
distance, you can do one of two things. You can either run high-quality straight-
through-pinned RS-232 or AT cable from the DB end of the adapter cable to your
device, or you can put aside the adapter cable, attach a specially pinned modular
adapter to your device, and run straight-though-pinned RJ-45 male to RJ-45 male
8-wire twisted-pair cable from the control port to the adapter. (Call Black Box
Technical Support to discuss either application. In neither case should you exceed
the normal RS-232 maximum distance of 50 ft./15.2-m.)
3.5.2 C ONNECTING TO THE DDS P ORT (“-DDS” M ODELS O NLY )
Run twisted-pair cable with four or more wires, terminated with RJ-48 plugs, from
your DDS port to your WAN-access device’s input port or your WAN direct-
connection point.