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Modem Data Security

Keep intruders out of your computer network.


Please call 877-877-2269 for a replacement product or part.
1 YEAR DoubleDiamond™ Warranty (Standard)

Product Features

  • Totally automatic and transparent to end users. No passwords, PINs, tokens, or dial backups!


Modem Data Security makes access easy for authorized users but stops intruders cold. Install one at your central site between the modem and your host. Then distribute one to each of your authorized remote users—up to 500 in all! These units, plugged in-line between each remote modem and PC, initiate a dual challenge/response authentication process that ensures user authorization before starting a peer-to-peer or client/server session.
Modem Data Security also keeps intruders from eavesdropping on in-progress transmissions via real-time DES encryption of all data signals.

Tech Specs

Authorization Table Nonvolatile memory, 5-year lithium battery-backed
Client/Server and Peer-to-Peer Up to 500 nodes can be accessed by each authorized device
Data Encryption Speed >1 Mbps
Encryption Full DES Standard, 56-bit key, plus cipher-block chaining
Key Generation Automatic, random per session; key is never transmitted or available to user
Power 9 VDC, <200 mA, external power transformer included
Protocol Asynchronous
Serial Speed Up to 38.4 kbps (autodetecting)
Size 1.8"H x 2.8"W x 4.9"D (4.6 x 7.1 x 12.4 cm)

* Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.



Double Diamond Warranty Diamond

Double Diamond™ Warranty (Standard)

Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

The Modem Data Security comes with a standard 1 YEAR warranty already included.

During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

Plus, get an Extended Double Diamond Warranty.

You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

* Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.