General Products
Unisys Products
Helpful Links
Mail List
Ordering Info
Tech Tips
Wish List


Telephone Line Sharing
Dial Security
Dial Security Product Selection Guide
ReBooting & Remote AC Power Control
Remote Switching
RS-232 Products

Computer Peripheral Solutions, LLC - Tech Tips
No Inbound Calls Allowed

An insurance company had a pool of modems that were intended for dial out only. To insure this, they set their modems for "no answer", but it wasn't long before the employees learned how to reconfigure them with a simple AT command and use the lines to get in from home. A call to their homes left the number on their Caller ID. This left a bank of hit and miss unsecured modems on a very proprietary network.

To solve this problem, the company installed Challenger P2 Locks on each line. The P2s are a hardware Lock and Key combination designed to authenticate the caller. Only calls with the proper Key can get through. Since no Keys were ever issued, no inbound calls ever got through which was the original objective.


Computer Peripheral Solutions, LLC
5295 Webb Parkway NW
Lilburn, GA 30047
9:00 AM - 5:30 PM EST
Technical Support
(770) 638-7640
9:00 AM - 5:30 PM EST
(770) 638-8659

© Copyright 1996-2012  Computer Peripheral Solutions, LLC
This file last modified March 6, 2012