Black Box MD885A-R4 Manual de usuario
Secure sync or async dial-in access
to your data center.
Secure sync or async dial-in access
to your data center.
Modem 34336
© 2007. All rights reserved. Black Box Corporation.
FREE 24-hour Tech Support: 724-746-5500
blackbox.com
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FEATURES
• Front-panel programmable.
• Sync or async operation.
• Multiple levels of network security
ensures safe transmission of sensitive
data such as financial information.
• Digital Signal Processing technology
enables 33.6-kbps speeds for sync
traffic, 230.4-kbps speeds for async
traffic, and 14.4-kbps speeds for fax
transmissions.
• Automatically falls back to slower
modem speeds if necessary.
• Automatic dial backup.
• Supports V.42 bis and MNP 5.
• V.54 diagnostics.
The Modem 34336’s connections.
OVERVIEW
The Modem 34336 has the reliable performance, the top-
flight security, and the wide range of features to make it ideal
for secure data-center installations. Best of all, it’s easily pro-
grammable from the front panel, so its features are readily
accessible.
Secure.
This modem’s multiple levels of security are tailored for
data centers that receive highly-sensitive data. It’s particularly
well suited for financial institutions that handle large
amounts of private data such as account information and
social security numbers.
The modem can be programmed for manual password
protection (MPP) in which the connecting user manually
types in a password. The modem can be set to connect the
user immediately or, for an extra layer of protection, hang
up and call back at a pre-determined number.
Automatic password protection (APP) incorporates the
password as part of the modem training process and is trans-
parent to the user. APP can also be set to call back.
Flexible.
The Modem 34336 operates over the Public Switched
Telephone Network (PSTN) and over 2- or 4-wire
unconditioned leased lines.
Although it handles sync speeds of up to 33.6 kbps and
async speeds of up to 230.4 kbps, the Modem 34336 can easily
communicate with slower modems. It automatically falls back
to slower modes including V.32 terbo, V.32 bis, V.23, V.22, V.22
bis, V.21, or Bell 212A.
Compatible.
The modem supports V.13, so it works with systems con-
figured for half-duplex modems. A V.29 Fast Train (FT) mode
works in multidrop network configurations.
The V.25 bis autodialer complies with both async and sync
international serial call origination standards.
AT emulation mode enables the modem to communicate
with a device running intelligent communications software
designed to drive an AT style autodial modem. For error
correction and data compression, the modem supports V.42
bis and MNP®Class 5 in both dialup and leased-line
operations.
DTE DIAG
TX
DIAL
LEASED
LINE PHONE
POWER
DTE
RS-232
cable
4/4/2007
#16005
724-746-5500 blackbox.com
DTE AC
outlet
Dialup line Leased line TelephonePower
trans-
former
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TECH SPECS
Alternate Fallback Capability — V.23, V.22, V.21
Fax Standards — V.29, V.27 terbo, V.21 Channel 2 T.30, V.17
Operation — 2-wire: Full duplex, dialup or leased lines;
4-wire: Full duplex, leased lines
Speed (Maximum) —
Sync: 33.6 kbps;
Async: 230.4 kbps;
Fax: 14.4 kbps
Standards — ITU: V.34, V.33, V.32 bis, V.32, V.29 Fast Train, V.22 bis;
Bell: 212A, 208 A/B, 103
Connectors — (1) DB25 F, (2) RJ-11, (2) RJ-45, (1) 5-pin DIN
Power — 115 VAC, 60 Hz (230-VAC version on request)
Size — 2.5"H x 9.7"W x 10.7"D (6.4 x 24.6 x 27.2 cm)
Weight — 4 lb. (1.8 kg)
4/4/2007
#16005
724-746-5500 blackbox.com
Item Code
Modem 34336 MD885A-R4
• In leased-line applications, the Modem 34336 monitors
received carrier level and signal quality.
If performance drops below selected thresholds, the
local modem automatically establishes a dial connection
to the remote modem. Thanks to automatic loopback,
the communication path returns to the leased line when
conditions improve.
• In dialup applications, the Modem 34336 can be pro-
grammed to redial the remote modem automatically.
This is particularly helpful if the dialup line connection
is lost.
• The automatic password protection (APP) feature gives
you transparent security support by incorporating the
password as part of the modem training process. You can
also program the modem to call back the originator during
the APP security process.
• The Modem 34336 supports Analog Loopback (Loop 3),
Analog Loopback Selftest, Analog Loopback Selftest with
Errors, Remote Digital Loopback (Loop 2), and Remote
Digital Loopback Selftest.
Technically Speaking
Fax, too.
As a fax, the Modem 34336 is compatible with Group III,
Class 1 and Class 2 Fax. It supports multiple modulation stan-
dards and speeds for a variety of fax transmissions, including
V.17 at 14.4 and 12 kbps, and 9600 and 7200 bps; V.29 at 9600
and 7200 bps; and more.
Automatic dial backup.
For leased-line applications, the Modem 34336 supports
automatic dial backup. The modem monitors carrier level
and signal quality and, if performance drops below selected
thresholds, automatically establishes a dialup PSTN connec-
tion. Automatic lookback returns the connection to the
leased line when the link is restored.
Front-panel configuration.
Configure the modem using the 2 x 20 character LCD and
six front-panel buttons. You can also use AT commands to
control configuration parameters through the DTE interface.
Diagnostics.
Last but not least, the modem includes V.54 diagnostics
to quickly isolate problems and increase uptime. Test the
modem from the front panel or through the DTE interface.
The modem supports Analog Loopback (Loop 3), Analog
Loopback Selftest, Analog Loopback Selftest with Errors,
Remote Digital Loopback (Loop 2), and Remote Digital
Loopback Selftest. Use the LED display to monitor the DTE
interface as well as transmit and receive on the phone line.
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