Black Box MD1621A User manual

JUNE 2001
MD1621A
Mini-Modem
(33.6 kbps Data/Fax Modem)
CUSTOMER SUPPORT INFORMATION
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
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.

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
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.

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
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.

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
TRADEMARKS
The trademarks mentioned in this manual are the sole
property of their owners.
NAMING CONVENTIONS USED IN THIS MANUAL
In the software you received, the Mini-Modem is called
the Multi-Modem or the MT2834ADX. This is the
correct software for your Mini-Modem.

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
CONTENTS
1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2 What the Package Includes . . . . . . . . . . . . 14
3. Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Safety Warnings. . . . . . . . . . . . . . . . . . . . . . 16
3.3 What You’ll Need . . . . . . . . . . . . . . . . . . . . 17
3.4 Step 1: Assemble the Modem. . . . . . . . . . . 18
3.5 Step 2: Connect the Modem to Your
System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.5.1 RS-232 Connection . . . . . . . . . . . . . . 21
3.5.2 LINE Connection. . . . . . . . . . . . . . . . 21
3.5.3 PHONE Connection . . . . . . . . . . . . . 21
3.5.4 POWER Connection . . . . . . . . . . . . . 22
3.5.5 Power-On Test . . . . . . . . . . . . . . . . . . 22
3.6 Step 3: Install the Modem in Windows 95
or 98 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.6.1 Adding the Mini-Modem to
Windows 95 or 98 . . . . . . . . . . . . . . . . 23

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
3.6.2 Removing Your Old Modem from
Windows 95 or 98 . . . . . . . . . . . . . . . . 24
3.7 Step 4: Install and Configure Your
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Third Party Communications Software . . . 25
4. Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1 What Can I Do with My Mini-Modem? . . . 29
4.2 Required Equipment . . . . . . . . . . . . . . . . . 32
4.3 Connections . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3.1 Connecting to the Computer
(“RS-232”) . . . . . . . . . . . . . . . . . . . . . . 35
4.3.2 Connecting to the Telephone Line
(“LINE”) . . . . . . . . . . . . . . . . . . . . . . 35
4.3.3 Connecting a Telephone Set
(“PHONE”) . . . . . . . . . . . . . . . . . . . . 35
4.3.4 Connecting to Power (“POWER”) . . 36
4.3.5 Surge Protectors and Lightning . . . . 37
4.4 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.5 Speed Indicator Blink Rates. . . . . . . . . . . . 40
5. AT Commands, S-Registers and Result
Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.1 AT Commands . . . . . . . . . . . . . . . . . . . . . . 42
5.2 S-Registers . . . . . . . . . . . . . . . . . . . . . . . . . . 74
5.3 Result Codes . . . . . . . . . . . . . . . . . . . . . . . . 77

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
6. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 79
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . 79
6.2 None of the LEDs Light When the
Modem Is On. . . . . . . . . . . . . . . . . . . . . . . . 80
6.3 The Modem Does Not Respond to
Commands. . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.4 The Modem Dials But Cannot Make a
Connection . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.5 The Modem Disconnects While Online . . 89
6.6 The Modem Cannot Connect When
Answering . . . . . . . . . . . . . . . . . . . . . . . . . . 90
6.7 File Transfer Is Slower Than It
Should Be. . . . . . . . . . . . . . . . . . . . . . . . . . . 91
6.8 I Am Losing Data . . . . . . . . . . . . . . . . . . . . 92
6.9 I Am Getting Garbage Characters on
the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . 93
6.10 My Fax and Communications Software
Won’t Run at the Same Time. . . . . . . . . . . 94
Appendix A: Regulatory Information . . . . . . . . . 95
A.1 Single-User Software License
Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . 95
A.2 FCC Regulations for Telephone Line
Interconnection. . . . . . . . . . . . . . . . . . . . . . 95
A.3 Canadian Limitations Notice. . . . . . . . . . . 96

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
Appendix B: Service and Calling for
Technical Support . . . . . . . . . . . . . . . . . . . . . . 98
B.1 Calling for Technical Support. . . . . . . . . . 98
B.2 About the Internet . . . . . . . . . . . . . . . . . . . 98

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
1. Specifications
Data Rates (Modem) — 33.6 kbps and 31.2 kbps,
28.8, 26.4, 24, 19.2, 16.8, 14.4, and 12 kbps,
9600 bps, 7200, 4800, 2400, 1200 and 0-300 bps
Data Rates (Fax) — 14,400, 9600, 4800
and 2400 bps
Data Format (Modem) — Serial, Binary,
Asynchronous
Compatibility (Modem) — ITU-T V.34, AT&T
V.32terbo, ITU-T V.32bis, V.32, Bell 212A and
103/113, ITU-T V.22, V.22bis, V.29, V.42, V.42bis
Compatibility (Fax) — ITU-T Group 3, T.4, T.30,
V.21, V.27ter, V.29, V.17, and EIA TR29.2
Error Correction — ITU-T V.42 (LAP-M or MNP 2,
3 or 4)
Data Compression — ITU-T V.42bis (4:1
throughput) or MNP 5 (2:1 throughput)
Speed Conversion — Serial-port data rates
adjustable to 300, 1200, 2400, 4800, and 9600 bps,
19.2 kbps, 38.4, 57.6, and 115.2 kbps

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
Mode of Operation — Half- or full-duplex over dial-
up lines; automatic or manual dialing, automatic
or manual answer
Flow Control — XON/XOFF, hardware
(RTS/CTS), HP (ENQ/ACK)
Intelligent Features — Fully AT command
compatible, autodial, redial, repeat dial, pulse
or tone dial, dial pauses, call status display, auto
parity and data-rate selections, keyboard-
controlled modem options, on-screen displays for
modem option parameters, command lines of up
to 60 characters each, and help menus
Command Buffer — 60 characters
Modem Modulations — FSK at 300 bps, PSK at
1200 bps, QAM at 2400, 4800, and 9600 bps (non-
trellis), QAM with trellis-coded modulation (TCM)
at 9600 bps, 12 kbps, 14.4, 16.8, 19.2, 21.6, 24,
26.4, 28.8, 31.2, and 33.6 kbps
Fax Modulations — V.21 CH2 FSK at 300 bps,
V.27ter DPSK at 2400 and 4800 bps, V.29 QAM
at 7200 and 9600 bps, V.17 TCM at 7200 bps,
9600 bps, 12 kbps, and 14.4 kbps

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
Carrier Frequencies, ITU-T V.34 — 1600, 1646,
1680, 1800, 1829, 1867, 1920, 1959, 2000 Hz
Carrier Frequencies, AT&T V.32 terbo/ITU-T
V.32bis/V.32 — 1800 Hz
Carrier Frequencies, V.22bis/V.22 or Bell 212A
Standard (2400 & 1200 bps) —Transmit originate:
1200 Hz; Transmit answer: 2400 Hz; Receive
originate: 2400 Hz; Receive answer: 1200 Hz
Carrier Frequencies, Bell 103/113 (300 bps)—
Transmit originate: 1270 Hz mark, 1070 Hz space;
Receive originate: 2225 Hz mark, 2025 Hz space;
Transmit answer: 2225 Hz mark, 2025 Hz space;
Receive answer: 1270 Hz mark, 1070 Hz space
Fax Carrier Frequencies — V.21 Ch2 (half duplex):
1650 Hz mark, 1850 Hz space for transmit
originate; 1650 Hz mark, 1850 Hz space for
transmit answer; V.27ter: 1800 Hz
originate/answer; V.29 QAM: 1700 Hz
originate/answer; V.17 TCM 1800 Hz
originate/answer
Transmit Level — -13 dBm
Frequency Stability — ±-0.01%

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
Receiver Sensitivity — -43dBm under worst-case
conditions
AGC Dynamic Range — 43 dB
Interface Connectors — EIA RS-232C/ITU-T
V.24/V.28 DB25 RS-232C connector; two RJ-11
phone jacks (one RJ-11 jack on UK and
international modems), power jack
Cables — One 14-foot (4.3-m) RJ-11 phone cable
(USA); external power transformer and cord
NOTE
Any cables connected to the computer should be shielded
to reduce interference.
Diagnostics — Power-on self test, local analog loop,
local digital loop, remote digital loop
Indicators — LEDs for Transmit Data, Receive Data,
Carrier Detect, 33.6 kbps, 14.4 kbps, 9600 bps, Off
Hook, Terminal Ready, Error Correction, Fax
Speaker — Command-controlled speaker for call
progress monitoring
Manual Control — Power switch

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
Enviromental — Temperature range 0 to 50 °C
(32 to 120 °F); Humidity range 20 to 90%
(non-condensing)
Power Requirements — 100-130 VAC, 50/60 Hz,
0.1A/5W; two-prong outlet-mounted transformer
(included); 230V/50 Hz optional (international)
Regulatory Compliance — UL, CUL, CSA, FCC
Size — 1.15"H x 4.25"W x 5.8"D
(2.9 x 10.8 x 14.8 cm)
Weight — 0.5 lb. (0.3 kg)

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
2. Introduction
2.1 General
The Mini-Modem (MD1621A) complies with the
enhanced V.34 standard for a top speed of 33,600 bps.
It’s downward-compatible with all previous standards,
including V.32terbo (19,600 bps), V.32bis (14,400 bps),
V.32 (9600 bps), V.22bis (2400 bps), and V.22 (1200
bps)—and it’s a full-duplex intelligent modem with V.42
error correction, V.42bis data compression, and V.17
(14,400 bps), Class 2, Group 3 fax capabilities.
2.2 What the Package Includes
Make sure you have all of the following components
before trying to operate your modem:
• One Mini-Modem (MD1621A)
• One DC power supply
• One set of four plastic feet
• One telephone cable

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
• This User manual
• Communications (datacomm) software
If any of these items are missing, please contact
Black Box immediately at 724-746-5500.

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
3. Quick Start
3.1 Introduction
We know you’re eager to get your Mini-Modem up and
running, so we’ll skip the features for now, and show you
step-by-step how to set it up, check it out, and make your
first calls.
3.2 Safety Warnings
• Never install telephone wiring during a lightning
storm.
• Never install a telephone jack in a wet location
unless the jack is specifically designed for wet
locations.
• Never touch uninsulated telephone wires or
terminals unless the telephone line has been
disconnected at the network interface.
• Use caution when installing or modifying
telephone lines.
• Avoid using a telephone (other than a cordless
type) during an electrical storm; there may be a
remote risk of electrical shock from lightning.

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
• Do not use a telephone in the vicinity of a gas leak.
3.3 What You’ll Need
Before starting, please make sure you have everything
you need:
We supply:
• The Mini-Modem (MD1621A)
• A DC power supply module
• One set of four plastic feet
• One telephone cable
• Communications (datacomm) software
• This user manual
You supply:
• A computer with an unused external serial port
• A shielded RS-232 serial cable with a male DB25
connector on one end and a connector to match
your computer’s serial port on the other end

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
• A nearby AC power outlet
• A nearby telephone line jack
If you are unfamiliar with computers, please see
Chapter 4, Features, for more information on the
required equipment before you proceed.
3.4 Step 1: Assemble the Modem
The only assembly required is to mount the feet on the
bottom of the modem. Simply peel the four self-adhesive
plastic feet off the backing strip and press them into the
recesses on the bottom of the modem. You can also use
self-adhesive Velcro patches (not included) to mount
the modem on a vertical surface or to keep it from being
dislodged on a horizontal surface. If you use Velcro
patches, we recommend that you mount them where
they will not obscure the labels on the bottom of the
modem.

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MINI-MODEM (33.6 KBPS DATA/FAX MODEM)
Figure 3-1. Mounting the feet.
3.5 Step 2: Connect the Modem to Your System
Placing the Mini-Modem in a convenient location,
connect it to your computer’s serial port, to the
telephone line, to AC power, and, optionally, to your
telephone.