Black Box MX320A-HS User manual

NOVEMBER 2000
MX320A-HS MX320AE-HS
MX325A-HS MX325AE-HS
X.25 PAD-2
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]
RESET
CH3
ERROR
POWER
CH2
CH1
SYNC DATA

1
FCC AND IC STATEMENTS, TRADEMARKS
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.
EN 55022 warning: This is a Class A product. In a domestic environment, it
might cause radio interference. If it does, the user might be required to take
adequate measures to correct the interference.
TRADEMARKS USED IN THIS MANUAL
BLACK BOX and the logo are registered trademarks of Black Box
Corporation.
Any other trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.

2
X.25 PAD-2
EUROPEAN UNION DECLARATION OF CONFORMITY
The manufacturer declares that the X.25 PAD-2 conforms to the following
EMC and safety standards:
• EN55022 (1994): “Limits and methods of measurement of radio
disturbance characteristics of information technology equipment.”
• EN50082-1 (1992): “Electromagnetic compatibility: Generic
immunity standard for residential, commercial, and light industry.”
• EN 60950 (1992/3): “Safety of information technology equipment,
including electrical business equipment.”
The X.25 PAD-2 herewith complies with the requirements of
the EMC Directive 89/336/EEC. The product was tested in a typical
configuration.
Also, in accordance with EN 41003, the safety status of all ports on the
X.25 PAD-2 is declared to be SELV (Safety Extra Low Voltage).

3
UL STATEMENTS, SAFETY WARNING
UL Listing Requirements
IMPORTANT SAFETY INSTRUCTIONS
For North American Users
The X.25 PAD-2 is powered by an external power supply. To
reduce the risk of shock, fire, and injury, use it only with a
UL®listed and CSA Certified Class 2 power supply rated 12
VDC, 400 (or more) mA.
Exigences UL
INSTRUCTIONS IMPORTANTS DE SÉCURITÉ
Pour les utilisateurs Nord Americains
Le X.25 PAD-2 est renforcé par un transformateur extérieur.
Afin de réduire le risque d’électrocution, de feux ou de
blessure, utiliser seulement avec le UL listé et le CSA
Certifié
classe 2 le transformateur de 12 VDC, 400 mA ou plus.
Safety Warning
Always observe standard safety precautions when you install,
operate, and maintain the X.25 PAD-2. Only qualified and
authorized service personnel should attempt to adjust,
maintain, or repair it; this should never be done by untrained
or unauthorized persons.

4
X.25 PAD-2
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.

5
NOM STATEMENT
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.

6
X.25 PAD-2
Contents
Chapter Page
1. Specifications .............................................................. 7
2. Introduction ............................................................. 11
3. Installation ................................................................ 13
3.1 The Complete Package ..................................... 13
3.2 Site Requirements ............................................. 13
3.3 Setting the NOR/INI Jumper ........................... 14
3.4 Connecting Cables and Power .......................... 16
3.4.1 Channel 1 ................................................. 16
3.4.2 Channels 2 and 3 ..................................... 17
3.4.3 Power ........................................................ 18
4. Operation .................................................................. 19
4.1 The External Components ............................... 19
4.2 Operating Instructions ...................................... 22
4.2.1 Power ON .................................................. 22
4.2.2 Normal Operation .................................... 23
4.2.3 Power OFF ................................................ 23
5. Troubleshooting ....................................................... 24
5.1 Things to Check First ........................................ 24
5.2 Calling Black Box .............................................. 25
5.3 Shipping and Packaging .................................. 26

7
CHAPTER 1: Specifications
1. Specifications
Compliance — CE (EN55022, EN 50082-1, EN 60950)
Class A; FCC Class A, IC Class/classe A
Interfaces —
Channel 1 (to packet-switched synchronous link):
MX320 models: ITU V.35 proprietarily pinned on
DB25, DTE;
MX325 models: EIA/TIA RS-232/ITU V.24/V.28,
DTE;
Channels 2 and 3 (to local async devices): EIA/TIA
RS-232/ITU V.24/V.28 proprietarily pinned on RJ-45,
DCE
Protocols —
Channel 1: Synchronous 1988 ITU X.25 LAP-B or Frame
Relay; for Frame Relay, supports CCLM, LMI, and
ANSI PVC management protocols, as well as ANSI
T1.606, T1.617 Annex D, T1.618, and ITU Q.922
Annex A;
Channels 2 and 3: Asynchronous SLIP or X.28 (user-
selectable)
Clock Source — Channel 1: Internal or external for
receive and transmit paths, user-selectable

8
X.25 PAD-2
Data Rate —
Channel 1:
MX320 models: Up to 2 Mbps, user-selectable;
MX325 models: Up to 128 kbps, user-selectable;
Channels 2 and 3: 75 bps to 115.2 kbps, user-selectable
Data Format — Channels 2 and 3: 5, 6, 7, or 8 data bits;
even, odd, mark, space, or no parity; 1, 1.5, or 2 stop
bits; user-selectable
Flow Control — Channels 2 and 3: Hardware (DTR/CTS)
or software (X-ON/X-OFF), user-selectable
Other Characteristics for Channels 2 and 3 —
Log-on messages: Herald and bulletin, user-definable;
Command modes: ITU X.28 (with proprietary
extensions) and X.29;
Terminal handling: Enhanced, beyond the requirements
of ITU X.3
Packet Size — Up to 4 KB for X.25 or 8 KB for Frame Relay
Maximum Distance —
Up to 50 ft. (15.2 m) to attached devices;
MX320 models: If unbalanced control leads aren’t
required, transmission across 500 ft. (152.4 m) or
more might be possible to/from Channel 1 only

9
CHAPTER 1: Specifications
Memory — 512 KB RAM
User Controls —
Top-mounted reset button;
(1) Internal board-mounted jumper for power-up
settings
Indicators — (6) Top-mounted LEDs:
(1) POWER (lights green while unit is powered);
(1) ERROR (lights red if a hardware malfunction is
detected);
(1) SYNC (lights or flashes green to show status of
synchronization between linked PAD-2s);
(3) DATA (one for each channel—these light or flash
yellow in response to data activity on the
corresponding ports)
Connectors —
(1) Left-side-mounted DB25 female for channel 1 (patch
cable provided to M/34 female on MX320 models);
(2) Right-side-mounted RJ-45 female for channels 2 and 3;
(1) Front-mounted barrel jack for power
Temperature Tolerance — 32 to 122˚F (0 to 50˚C)
Humidity Tolerance — Up to 90% noncondensing

10
X.25 PAD-2
Power —
Through desktop power supply:
Input: 100 to 250 VAC, 47 to 63 Hz (autosensing), at
approximately 300 mA;
Output: 5 VDC at up to 1.5 A;
Consumption: 3.5 watts maximum
NOTE
Although the “-A” and “-AE” models of the PAD-2 formerly
used different 115-VAC and 230-VAC power supplies, they
now use the same universal power supply.
Size — 0.9"H x 2.1"W x 4.3"D (2.3 x 5.4 x 11 cm);
Weight — 3.3 oz. (90 g)

11
CHAPTER 2: Introduction
2. Introduction
The X.25 PAD-2 provides easy, cost-effective access to a
packet-switching network or device in a wide range of
applications. For example, it can serve as:
• A PAD (Packet Assembler/Disassembler);
• An access unit for private or public X.25 networks;
• An access server for a mainframe’s X.25 ports;
• An async switch and contention manager; or
• A FRAD (Frame Relay Access Device).
It can also be used to run asynchronous data over Frame
Relay, either in X.25 packets or directly (in SLIP
protocol).
Two versions are available, in “-A” (115-VAC) and
“-AE” (230-VAC) models: The MX320A-HS and
MX320AE-HS models use V.35 for their channel-1 (sync
packet-switched) interface, while the MX325A-HS and
MX325AE-HS models use RS-232. On all models,
channel 1 is a DB25 female connector, while local async
channels 2 and 3 are RJ-45 female connectors, but the
MX320 models come with a short cable you can attach
to the WAN port to patch it to a V.35-standard M/34
female connector. The X.25 PAD-2’s maximum data rate

12
X.25 PAD-2
on channel 1 is 128 kbps for the MX325 models or
2 Mbps for the MX320 models.
Channel 1 is always DTE, but can be configured for
either X.25 or Frame Relay. Channels 2 and 3 are always
DCE but can be configured for SLIP or X.28.
The rest of this manual describes the procedures for
installation and basic operation of the X.25 PAD-2. For
detailed information about configuring, operating, and
testing the unit, please refer to our Packet Switching
Guide.

13
CHAPTER 3: Installation
3. Installation
3.1 The Complete Package
The X.25 PAD-2 ships from the factory completely
assembled. It comes with its power supply, an RJ-45 to
DB25 patch cable for configuration, and this manual.
MX320 models should also come with a DB25 to M/34
patch cable for the WAN-link port. If anything is missing
or arrived damaged, please call Black Box right away.
3.2 Site Requirements
To install the X.25 PAD-2, you’ll need to place it within
5 feet (1.5 meters) of an easily accessible grounded AC
outlet capable of furnishing 115 VAC (“-A” models) or
230 VAC (“-AE” models). Any power supply you use with
the PAD-2 should provide 5 VDC at at least 700 mA and
should be regulated (+10%, –2%).
The location where you place the X.25 PAD-2 should
always have an ambient temperature between 32 and
122˚F (0 and 50˚C). The relative humidity at that
location should never exceed 90%, and condensation
should never occur there.

14
X.25 PAD-2
3.3 Setting the NOR/INI Jumper
Most of the X.25 PAD-2’s configuration settings are
handled through its command facility (refer to the
Packet Switching Guide). There is, however, one jumper
inside the unit that you might want to set differently. As
shown in Figure 3-1 on the next page, the jumper is
labeled JP2 and has two possible settings: NOR (normal
operation) and INI (initialize).
If JP2 is set to NOR (the default setting, suitable for
most applications), the X.25 PAD-2 will begin operating
normally when you power it up, using the same
configuration settings that it was using when it was last
powered down.
If JP2 is set to INI, the X.25 PAD-2 will initialize itself,
restoring all of its configuration settings to their factory-
default values, every time you power it up.
To access this jumper, make sure the PAD-2 is
unplugged, then unscrew and remove the four screws at
the corners of the bottom of the unit. You should then
be able to lift off the top half of the X.25 PAD-2’s case.
When you’re finished, put the top half of the case back
on and refasten the screws (do not overtighten them).

15
CHAPTER 3: Installation
Figure 3-1. Setting NOR/INI jumper JP2.
or
Channel 3
(Local Async
Channel)
Channel 2
(Local Async
Channel)
Channel 1
(Sync WAN
Link)
Power Jack

16
X.25 PAD-2
3.4 Connecting Cables and Power
The X.25 PAD-2 has three ports designated as
channels 1, 2, and 3. When you hold the PAD-2 so you
can read the labeling on its top panel, channel 1 (the
DB25 female connector) is on the left-hand side of the
unit and channels 2 and 3 (the RJ-45 female connectors)
are on the right.
NOTES
For pinouts of these connectors, refer to the Packet
Switching Guide.
All cables attached to the X.25 PAD-2 should be shielded
in order to comply with FCC rules. The X.25 PAD-2 and its
data interfaces will work well even if the cables are not
shielded, but some radio interference might occur.
3.4.1 C HANNEL 1
Channel 1 is the “main link” connector that supports
synchronous packet-switched data. On MX325 models,
its DB25 connector is pinned as an RS-232 DTE, like a
terminal or the larger COM ports on a PC. To attach it
to a sync RS-232 DCE (sync modem, SME, etc.) with a
DB25 female port, use a 25-pin straight-through-pinned
shielded RS-232 cable such as product code
EBN25C-MM. To connect to other types of sync RS-232
devices/ports, please call Black Box Technical Support.

17
CHAPTER 3: Installation
On MX320 models, the DB25 connector is
proprietarily pinned as a V.35 DTE. A DB25 male to
M/34 female patch cable is included with the unit;
attach this to channel 1 to give the X.25 PAD-2 a
standard V.35 DTE port. To attach this to a V.35 DCE
(CSU/DSU, etc.) with an M/34 female connector, use
straight-through-pinned shielded V.35 cable such as
product code EYN450-MM. To connect to other types of
V.35 devices/ports, call Black Box Technical Support.
3.4.2 C HANNELS 2 AND 3
Channels 2 and 3 are the X.25 PAD-2’s async local
channels. Their RJ-45 female connectors are
proprietarily pinned as RS-232 DCE.
The PAD-2 comes with a single RJ-45 male to DB25
female patch cable that you can use to attach one of
these channels to the DB25 male serial port of a PC or
terminal for easy configuration. After you configure the
PAD-2, you can leave this cable on if this PC or terminal
will be communicating across the packet-switched link;
this cable can support data transmission as well. Call
Black Box Tech Support if you’d like a second such
cable, or if you need an adapter for this cable to attach a
DB25 female DCE at this distance.

18
X.25 PAD-2
To hook up either of these channels to an RS-232
device or port that (a) is farther away or (b) has some
other type of connector, you’ll need to use shielded
twisted-pair cable with RJ-45 connectors such as product
code EVNSL60, plus a modular adapter that you can
build yourself or have us build for you. Call Black Box
Tech Support.
3.4.3 P OWER
All models of the X.25 PAD-2 now come with a universal
power supply that can accept power at voltages from
100 to 250 VAC and frequencies from 47 to 63 Hz. (At
one time, the “-A” and “-AE” models came with different
115-VAC and 230-VAC supplies, but this is not the case
now.)
To plug in and power up the PAD-2, you’ll need a
power-input cord that has a plug suitable for your AC
outlets on one end and an IEC 320 female outlet on the
other; we carry several varieties of such cords. Run this
input cord from a grounded AC outlet to the IEC 320
male inlet on the power-supply transformer. Then plug
the power-supply’s output cord into the barrel jack on
the front of the PAD-2. The unit should power up
immediately; it has no ON/OFF switch.

19
CHAPTER 4: Operation
4. Operation
4.1 The External Components
Figure 4-1 shows the X.25 PAD-2’s external components.
For the function of each numbered component, see
Table 4-1 on the next two pages.
Figure 4-1. The X.25 PAD-2’s top panel, showing the external
indicators, connectors, and reset button.
12
43
5
6
7