Black Box MT760A-232/232, MT760A-232/V35, MT760A-V35/V35, MT760A-X21/X21, MT760A-530/530 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: [e-mail]

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 information­technology 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.21­native 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 interface­specific 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 THEJ

UMPERS ON THE

M

AINCIRCUITBOARD

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

1192

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

JP6JP7

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

UMPERBANKS ON THEINTERFACEBOARDS

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 supervisory­control port. See the Appendix for the pinouts of these ports.

3.5.1 C

ONNECTING TO THECONTROLPORT

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 terminal­type 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 straight­through-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

ODELSONLY

)

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 direct­connection point.

22

FRADSWITCH A/S 3 PORT

3.5.3 C

ONNECTING TO THE

NON-DDS M

AIN-LINKPORTS

You can always use straight-through cables for these connections if you set the
FradSwitch A/S 3 Port’s interface-board DTE/DCE jumpers correctly (see
Section 3.3.3). (On X.21 models, the X.21 DCE jumpers also need to be set
correctly—see Section 3.3.2.) Beyond this, the type of cable you connect depends
on the link-port’s interface:

• How you connect an RS-232 device to a Switch’s RS-232 main-link port will
depend on what type of connector the device has. If it’s a DB25 male or
female, run a shielded straight-through-pinned RS-232 cable—such as our
EDN25C-MF or EDN25C-MM respectively—between the Switch port and the
device. If the device’s connector is a DB9 male—as will be the case if you are
attaching a terminal-emulating PC to upgrade the Switch’s software (see
Section 4.3)—run a PC/AT modem cable such as our EVMBMC between the
Switch port and the device. (Be aware that devices with normal DB9 RS-232
connectors, pinned as TIA-574, must communicate asynchronously with the
Switch. This is because the standard TIA-574 pinout does not include the sync
clocking signals present on the full RS-232 DB25 pinout.)

• To connect an RS-530 device to a Switch’s RS-530 main-link port, run a
shielded straight-through-pinned RS-530 cable—such as our EVN530-MM—
between the Switch port and the device.

• To connect a V.35 device to a Switch’s V.35 port, attach the included DB25
male to M/34 female adapter cable to the port. Then run a run a shielded
straight-through-pinned V.35 cable—such as our EYN450-MM—between the
M/34 end of the adapter cable and the device.

• To connect an X.21 device to a Switch’s X.21 main-link port, attach the
included DB25 male to DB15 female adapter cable to the port. Then run a
shielded straight-through-pinned X.21 cable—such as our EGM16E-MM—
between the DB15 end of the adapter cable and the device.

NOTE

The cables you attach to the FradSwitch A/S 3 Port should be shielded,
in order to comply with FCC rules. The Switch and its data interfaces
will work well even if the cables are not shielded, but some radio
interference may occur.

23

CHAPTER 3: Configuration and Installation

3.5.4 C

ONNECTING

AC P

OWER

AC power should be supplied to the FradSwitch A/S 3 Port through a power cord
terminated by a standard 3-prong plug, such as the 5-ft. (1.5-m) cord provided with
the Switch. Connect the cord’s outlet to the Switch’s rear-panel power-inlet, then
attach the cord’s plug to a standard grounded AC outlet.

CAUTION!

When you apply power to the FradSwitch A/S 3 Port, make sure that it is
properly connected to the site’s grounding (earth) system. Make sure to
always use a power cord with a ground lead running from the ground
terminal of the Switch’s power inlet to the ground contact of a utility­power (mains) outlet. Do not leave the Switch ungrounded by using a
power cord, power strip, extension cord, BPS/UPS, or outlet without a
ground conductor.

In the course of normal operation under normal conditions, your
FradSwitch A/S 3 Port’s fuse (located in the Switch’s rear panel above
the Switch’s power inlet) should never blow. But if it ever does, make
sure that you replace it only with a new fuse rated for the same required
current (see the rear-panel labeling). Do not use repaired fuses or short­circuit the Switch’s fuse holders. If you ever suspect that the Switch’s
fuse might have blown or been damaged, unplug the Switch and make
sure it is not powered up again until the problem can be checked and
fixed.

Operating the Switch when it’s not properly grounded or does not
have proper fuse protection could damage the Switch and any attached
equipment, and could also pose a potentially fatal shock hazard.

24

FRADSWITCH A/S 3 PORT

4. Operation

The FradSwitch A/S 3 Port supports a wide range of applications. These include:

• Connection of a bridge/router using HDLC encapsulation over Frame Relay.

• Encapsulating private X.25 over Frame Relay networks.

• Connecting SDLC/QLLC/LLC environment T-PADs and FEPs over X.25 or
Frame Relay Networks.

• Providing interfaces to DDS networks.

• SLIP communication and IP encapsulation over Frame Relay or X.25
protocols.

For more detailed configuration information, refer to the Packet Switching Guide.

4.1 The Switch’s Controls, Indicators, and Connectors

4.1.1 F

RONT-PANELCOMPONENTS

The FradSwitch A/S 3 Port’s front panel is shown in Figure 4-1 below. Its
numbered components are descibed in Table 4-1 on the next page.

Figure 4-1. The Switch’s front panel.

PWR ERR OVF TEST ACT

CONTROL

1 2 3

SYNC

ACTIV

RESET

CHANNELS

1

2

3

4

6

5

7

8

9

25

CHAPTER 4: Operation

Table 4-1. The Switch’s Front-Panel Controls, Indicators, and Connectors

No. in Component Function
Fig. 4-1

1 PWR LED Lights when the FradSwitch A/S 3 Port is powered

ON.

2 ERR LED Lights when a hardware malfunction is detected

during the power-up self-test or after you press the
RESET pushbutton.

3 OVF LED Lights when FradSwitch A/S 3 Port’s buffers are

full. In a properly designed system, this condition
usually indicates that one of the units connected to
the Switch is not responding to the flow-control
commands the Switch is sending it, which can
happen if the Switch is configured incorrectly.

4 TEST LED Lights when the FradSwitch A/S 3 Port is in

diagnostics mode (one of its test loops is active).
Data traffic is interrupted during diagnostic testing.

5 SYNC LEDs Indicate the synchronization status of the

corresponding main-link port on the FradSwitch
A/S 3 Port:

Condition: Indication:

Off Switch not powered.

On Switch powered and synchronized

with the peer at the other end of the
main link.

Continuous FradSwitch A/S 3 Port is powered but
flashing not synchronized with the

corresponding peer.

6 ACTIV (Main-Link Light to show activity (reception or transmission of

Activity) LEDs frames) on the corresponding main-link port.

7 Control Port Connect a terminal to this port to configure the

Switch through its firmware-based menu system.

8 ACT (Control-Port Lights when the control port is active (receives

Activity) LED commands or transmits configuration information).

9 RESET Button Press to reinitialize the FradSwitch A/S 3 Port.

26

FRADSWITCH A/S 3 PORT

4.1.2 R

EAR

-P

ANELCOMPONENTS

The FradSwitch A/S 3 Port’s rear panel is shown in Figure 4-2 below. Its numbered
components are descibed in Table 4-2 below.

Figure 4-2. The Switch’s rear panel (“-232/232” model shown).

Table 4-2. The Switch’s Front-Panel Controls, Indicators, and Connectors

No. in Component Function
Fig. 4-2

1 Power Inlet AC-power connector with integral fuse.

2 Ports 2 and 3: Connection points for local DTE or DCE devices.

Local Main-Link
Connectors

3 Port 1: Connection point for packet-switching WAN

WAN Main-Link equipment.
Connector

4 Interface Labels Identify the interface carried by the corresponding

connector: “V.24” for RS-232/V.24, “530” for
RS-530, “V.35” for V.35, or “X.21” for X.21.

CH.2

V-24

CH.3

V-24

CH.1

V-24

100-230VAC/ 0.25A T 250V

1

2

3

4

27

CHAPTER 4: Operation

4.2 Basic Operating Instructions and Indications

Once you install and configure the FradSwitch A/S 3 Port, it normally operates
unattended. After initial setup, operator intervention is only required when the
Switch has to be reconfigured or if something goes wrong. Note that the Switch
stores its configuration in nonvolatile RAM (NVRAM), so it won’t lose its
configuration if it loses power.

4.2.1 P

OWER-UP

The FradSwitch A/S 3 Port will begin operating as soon as you attach its power
cord to its rear-panel power inlet and plug the cord into AC power; the Switch has
no ON/OFF switch. The Switch’s PWR LED should light and some or all of its
other LEDs should flash. (Which other LEDs flash might depend on how the
Switch is configured.) If the ERR, OVF, or TEST LEDs light, make sure that after a
short interval (during which the Switch performs its power-up self-test) the LED
goes dark again.

4.2.2 N

ORMALOPERATION

During normal operation, the PWR and SYNC LEDs should be continuously lit and
the TEST, OVF, and ERR indicators should remain dark. Channel- and link-activity
LEDs should flash according to the traffic load, and should be dark when the
channel is idle.

4.2.3 P

OWER-DOWN

To turn off the FradSwitch A/S 3 Port, unplug its power cord from AC power; the
Switch has no ON/OFF switch.

28

FRADSWITCH A/S 3 PORT

4.3 Upgrading the Switch’s Firmware

Because the FradSwitch A/S 3 Port has flash memory, you can upgrade its firmware
without replacing its EPROMs. To do so, take these steps:

1. Connect a PC running terminal emulation to the switch’s control port.
Configure the terminal emulator to transmit and receive at 9600 bps using no
parity, 8 data bits, and 1 stop bit (“9600,N,8,1”).

2. When the asterisk “*” prompt appears on the screen, type C0 and press
[Enter]. You will be prompted to enter a password; just hit [Enter] (the
Switch’s default password state is no password at all).

3. The Main Menu will appear:

MAIN MENU

-----------

1) CONFIGURE

2) SYSTEM CONTROL

3) DIAGNOSTICS

4) STATUS and STATISTICS

5) LOGOUT

Select:

4. Select option 2. The System Control Menu will appear:

SYSTEM CONTROL MENU

-------------------

1) Link down

2) Link up

3) Clear Channel

4) Clear LCN

5) Update date

6) Update time

7) Reset statistics

8) Rearrange NOVRAM

9) Reset

l0) Set default configuration

11) Disconnect dial link

12) Enable software upgrade
CR) Exit

SELECT:

29

CHAPTER 4: Operation

5. Select option 12. This screen will appear:

**********************************************************

*

*

* WARNING !!!

*

*

*

* THIS ACTION WILL ENABLE YOU TO DOWNLOAD

*

* A NEW SOFTWARE VERSION AFTER RESET.

*

* * * *

*

* Type:

*

* LINK1 for download through link 1.

*

* LINK2 for download through link 2.

*

* LINK3 for download through link 3.

*

* CHAN1 for download through front channel 1.

*

*

*

* You should connect a terminal configured:

*

* 9600, N, 8, 1 to the desired port.

*

*

*

**********************************************************

6. Type “CHAN1” and press [Enter] if the PC is attached to the control port;
type “LINK1” and press [Enter] if the PC is attached to main-link port 1, etc.
(If you select a main-link port, make sure that that port is an RS-232 type and
is configured for async operation. If you try to select a non-RS-232 main-link
port, the download channel will automatically default to CHAN1, the front­panel control port.) After you make your selection, you will be returned to
the System Control Menu.

7. Reset the Switch by either (a) selecting option 9 at the System Control Menu
(the preferred method), (b) pressing the RESET button onthe Switch’s front

30

FRADSWITCH A/S 3 PORT

panel, or (c) unplugging the Switch and plugging it back in again. This
screen appears:

************************************************************

* Software Upgrade System

*

*

*

*

*

* Please select one of the following:

*

*

*

* 1) 9600 bit/s

*

* 2) 19200 bit/s

*

* 3) 38400 bit/s

*

* 6) Run the existing software (NO

download) *

*

*

************************************************************

31

CHAPTER 5: Troubleshooting

8. If you want to abort the upgrade process, select option 6. Otherwise, select
your desired firmware-transfer data rate. (Regardless which option you
choose, the number whose key you press will not appear on screen.) If you
were to choose option 3, this message would appear:

************************************************************

* Software Upgrade System

*

*

*

* Please change terminal setting

*

* To:

*

* 38400,N,8,1

*

*

*

* and start to download new software.

*

************************************************************

9. Reconfigure the emulator to communicate at your desired data rate
(38,400 bps in this example), then have it send the new firmware file to the
Switch as “ASCII” or (preferably) “raw ASCII” data. When the firmware is
downloaded successfully, the following message will appear:

Successful download

10. Reset the Switch again; you will again be returned to the System Control
Menu. Press [Enter] to exit the menu; the Switch returns to normal
operation.

32

FRADSWITCH A/S 3 PORT

5. Troubleshooting

5.1 Things to Try First

If a problem occurs with your FradSwitch A/S 3 Port, try these things first:

• Make sure that the Switch is actually powered ON (the PWR indicator should
be lit).

• Make sure all cables are properly connected.

• Make sure that all equipment connected to the Switch is powered ON and
operating normally.

• Check the Switch’s indicators.

• Make sure that the configurations of the local FradSwitch A/S 3 Port and the
remote PAD or switch correspond to the requirements of the equipment
connected to their channels.

In case these preliminary checks do not correct the problem, either press RESET
or turn the Switch OFF and then ON again. If the problem persists, refer to the
Packet Switching Guide for additional things to try. If this still doesn’t help, see the
next section.

5.2 Calling Black Box

If you determine that your FradSwitch A/S 3 Port is malfunctioning, do not attempt
to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box

Technical Support at 724-746-5500.

Before you do, make a record of the history of the problem. We 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.

• any particular application that, when used, appears to create the problem or
make it worse.

• the results of any testing you’ve already done.

33

APPENDIX: Connector Pinouts

5.3 Shipping and Packaging

If you need to transport or ship your FradSwitch A/S 3 Port:

• Package it carefully. We recommend that you use the original container.

• Before you ship the unit back to Black Box for repair or return, contact us to
get a Return Materials Authorization (RMA) number.

34

FRADSWITCH A/S 3 PORT

Appendix: Connector Pinouts

A.1 The RS-232 Interfaces

Here are the EIA/TIA RS-232 pinouts for the FradSwitch A/S 3 Port’s RS-232/V.24
main-link-ports and for the Switch’s front-panel control port. Note that the main­link port is a DB25 female connector with standard RS-232 pinning and that the
control port is a proprietarily pinned RJ-45 female connector.

ITU-T Main- Control- RS-232 Signal Signal/Lead Name

V.24 Link Port Circuit Abbrev.

Circ. (DB25) (RJ-45) Ref.

Ref. Pin Pin

101 1 1 –– SHD Shield (Chassis Ground)

102 7 7 AB SGND Signal Ground

103 2 5 BA TD Transmitted Data

104 3 3 BB RD Received Data

105 4 2 CA RTS Request to Send

106 5 8 CB CTS Clear to Send

107 6 – CC DSR Data Set Ready

108.2 20 6 CD DTR Data Terminal Ready

109 8 4 CF RLSD Received Line Signal Detector

(CD) (Carrier Detect)

113 24 – DA TSETT Tmitr. Sgnl. Elemt. Timing (DTE)

(EXTTC) (External Transmit Clock)

114 15 – DB TSETC Tmitr. Sgnl. Elemt. Timing (DCE)

(TC) (Transmit Clock)

115 17 – DD RSETC Rcvr. Sgnl. Elemt. Timing (DCE)

(RC) (Receive Clock)

125 22 – CE RI Ring Indicator

140 21 – RL RL Remote Loopback

141 18 – LL LL Local Loopback

142 25 – TM TM Test Mode

35

APPENDIX: Connector Pinouts

A.2 The RS-530 Interface

Here is the EIA/TIA RS-530 pinout for the FradSwitch A/S 3 Port’s RS-530 main­link-ports. This is also the pinout for the unadapted X.21 main-link ports; the
adapter cable that comes with the X.21 versions of the Switch patches these ports
to their standard DB15 connector (see Section A.4).

ITU-T RS-530 RS-530 Signal Signal/Lead Name

V.24 (DB25) Circuit Abbreviation

Circ. Pin Ref.

Ref.

101 1 –– SHD Shield (Chassis Ground)

102 7 AB SGND Signal Ground

103 2 BA TD A Transmitted Data A

14 BA TD B Transmitted Data B

104 3 BB RD A Received Data A

16 BB RD B Received Data B

105 4 CA RTS A Request to Send A

19 CA RTS B Request to Send B

106 5 CB CTS A Clear to Send A

13 CB CTS B Clear to Send B

107 6 CC DCR A DCE Ready A

22 CC DCR B DCE Ready B

108.2 20 CD DTR A DTE Ready A
23 CD DTR B DTE Ready B

109 8 CF RLSD (CD) A Rcvd. Line Sgnl. Detector (Carrier Detect) A

10 CF RLSD (CD) B Rcvd. Line Sgnl. Detector (Carrier Detect) B

113 24 DA TSETT (EXTTC) A Transmitter Signal Element Timing (DTE)

(External Transmit Clock) A

11 DA TSETT (EXTTC) B Transmitter Signal Element Timing (DTE)

(External Transmit Clock) B

114 15 DB TSETC (TC) A Transmitter Signal Element Timing (DCE)

(Transmit Clock) A

12 DB TSETC (TC) B Transmitter Signal Element Timing (DCE)

(Transmit Clock) B

115 17 DD RSETC (RC) A Receiver Signal Element Timing (DCE)

(Receive Clock) A

9 DD RSETC (RC) B Receiver Signal Element Timing (DCE)

(Receive Clock) B

140 21 RL RL Remote Loopback

141 18 LL LL Local Loopback

142 25 TM TM Test Mode

36

FRADSWITCH A/S 3 PORT

A.3 The V.35 Interface

Here is the ITU-T V.35 pinout for the FradSwitch A/S 3 Port’s V.35 main-link­ports, both unadapted (proprietarily pinned out on DB25) and patched with
adapter cable (pinned out on standard M/34).

ITU-T V.35 V.35 Signal Signal/Lead Name

V.24 (DB25) Adapter Abbreviation

Circ. Pin (M/34)

Ref. Pin

101 1 A FGND Frame Ground

102 7 B SGND Signal Ground

103 2 P SD A Send Data A

14 S SD B Send Data B

104 3 R RD A Receive Data A

16 T RD B Receive Data B

105 4 C RTS Request to Send

106 5 D CTS Clear to Send

107 6 E DSR Data Set Ready

108.2 20 H DTR Data Terminal Ready

109 8 F RLSD (CD) Rcvd. Line Signal Detector (Carrier Detect)

113 24 U TSETT (EXTTC) A Transmitter Signal Element Timing (DTE)

(External Transmit Clock) A

11 W TSETT (EXTTC) B Transmitter Signal Element Timing (DTE)

(External Transmit Clock) B

114 15 Y TSETC (TC) A Transmitter Signal Element Timing (DCE)

(Transmit Clock) A

12 AA TSETC (TC) B Transmitter Signal Element Timing (DCE)

(Transmit Clock) B

115 17 V RSETC (RC) A Receiver Signal Element Timing (DCE)

(Receive Clock) A

9 X RSETC (RC) B Receiver Signal Element Timing (DCE)

(Receive Clock) B

140 21 HH RL Remote Loopback*

141 18 JJ LL Local Loopback*

142 25 LL TM Test Mode*

*The Remote Loopback, Local Loopback, and Test Mode signals are pinned proprietarily on the

Switch; in the original V.35 spec, they are assigned to Pins N, L, and NN respectively.

37

LEGAL INFORMATION

A.4 The X.21 Interface

Here is the ITU-T X.21 pinout for the FradSwitch A/S 3 Port’s X.21 main-link­ports, both unadapted (pinned out as per RS-530 on DB25) and patched with
adapter cable (pinned out on standard DB15).

ITU-T RS-530 V.35 Signal Signal/Lead Name

V.24 (DB25) Adapter Abbrev.

Circ. Pin (M/34)

Ref. Pin

101 1 1 –– Frame Ground

102 7 8 G Signal Ground

103 2 2 T A Trasnmit A

14 9 T B Transmit B

104 3 4 R A Receive A

16 11 R B Receive B

105 4 3 C A Control (Request tio Send) A

19 10 C B Control (Request tio Send) B

109 8 5 I A Indication (Carrier Detect) A

10 12 I B Indication (Carrier Detect) B

113 24 7 E A External Signal Element Timing (External Clock) A*

11 14 E B External Signal Element Timing (External Clock) B*

114 15 6 S A Signal Element Timing (Transmit Clock) A

12 13 S B Signal Element Timing (Transmit Clock) B

*The E A and E B signals are not included in the standard X.21 interface. On the Switch, these

signals (which provide the external clocking option that X.21 otherwise lacks) are substituted for
the Byte Timing (B A and B B) signals, which are rarely if ever used.

A.5 The DDS Interface

Here is the pinout for the DDS main-link port (Port 1, the modular RJ-48 socket)
on “-DDS” models of the FradSwitch A/S 3 Port. All unlisted pins are unused.

DDS Signal/Lead Name

(RJ-48)

Pin

1 Receive (RX) Ring

2 Receive (RX) Tip

4 Transmit (TX) Ring

5 Transmit (TX) Tip

38

FRADSWITCH A/S 3 PORT

NOTICE

This manual contains information that is proprietary to the manufacturer. No part
of this publication may be reproduced in any form whatsoever without prior
written approval.

DISCLAIMERS

No representation or warranties for fitness for any purpose other than what is
specifically mentioned in this manual is made either by the manufacturer or its
agents.

The manufacturer shall not be liable for any direct, indirect special, incidental,

or consequential damages, whether based on contract, tort, or any legal theory.

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]

© Copyright 2004. Black Box Corporation. All rights reserved.