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

CPS - Products


Automatically Switches Inbound Modem Calls to any of 4 or 8 Different Receiving Modems


MRS Picture


MRS Application Diagram


  • Easy Programming
  • Touch-Tone or Hardware Switching
  • Password or Hardware Protected
  • Dial in and Dial out or Restrictive
  • Optional AC Power Cycling
  • 4 or 8 Port Versions
The MODEM ROUTER SWITCH (MRS) allows inbound modem calls to be switched to any of 4 or 8 user selected receiving modems (PCs, Servers, etc.). Although the switch was designed primarily for modem applications, it can be used for voice, fax, or other analog switching applications or even used to reboot your PC when the optional power adaptor is used.

Theory of Operation
The "switch to port" is selected by the caller when the call is placed. This is accomplished through one of the two primary operating modes provided by the MRS; the TOUCH-TONE and SECURE modes. The mode is selected through a rotary switch on the MRS.

The TOUCH-TONE MODE is a simple DTMF tone method of port selection. The caller simply enters a password and the number of the port to which they wish to connect. This can be accomplished manually from any touch tone key pad or by appending it to the "AT Command" in a dial string for dial modem applications.

The SECURE MODE involves a match box size Security Selector Key with an eight position rotary switch that is connected to the callers modem. It provides two functions; (1) it performs an encrypted handshake with the MRS and then (2) automatically switches the call to the selected port. When the MRS is operating in this mode, any inbound calls that are received without the security device are aborted within a half second.

The Security Key is programmed by connecting it to the MRS and programming the allowable ports for the device. Note that each device may be programmed differently allowing only selected ports to be accessed by various units. Each MRS has a unique factory system ID code and a user selected ID. They are transferred to the Key during programming. This prevents the key from being used on other systems.

Optional Intelligent AC Power Strip
In the event that the device(s) on the "switched to" port is not required to be under constant power, an AC Power Strip (6 AC outlets) can be installed at the terminal/modem. 2, 4, or 6 of the outlets on the AC Power Strip may be designated as "controlled outlets" at the time of order. The others may be used as "normal" AC Power Strip outlets.

The AC Power Strip will automatically power on when the port is selected and remove power when the call is completed. The AC Power Strip also recognizes additional touch-tone override commands that can be used to override the automatic on/off feature. The strip also includes an AC surge protection.

For easy installation, all of the ports have standard RJ-11 telephone style connectors.


1 TelCo Line & 4 Station Ports
Item No SWTMR1-4    Price $495.00 

1 TelCo Line & 8 Station Ports
Item No SWTMR1-8    Price $595.00

2 TelCo Line & 8 Station Ports
Item No SWTMR2-8    Price $645.00

Physical    7.5" W x 4.25" D x .75" H, 1 lb.
Connectors  (12) RJ-11 TelCo, Programming
LEDs        (14) Power, Mode, Key Program
Switches    (1) Manual Rotary 8 Position, 
            (1) 4-Bit Dip, (1) Pushbutton
Bell        None
Cable       (1) 5' RJ-11 Phone Cable
Adaptor     None
AC Power    Wall Mount 9VAC 1A, 115V/60Hz

Item No SWTCH-8
Quantity     1-5     6-10    11-25   26-50 
Price each   $79.00  $74.00  $65.00  $55.00

Physical    1.5" W x 3" D x .75" H, .25 lbs.
Connectors  (2) RJ-11 TelCo
LEDs        (1) Verify Connection
Switches    (1) Manual 8 Position Rotary
Bell        None
Cable       (1) 15" RJ-11 Phone Cable
Adaptor     None
AC Power    None

2 Controlled and 4 "Normal" Outlets
Item No SWTAC6-MP-2x4   Price $ 79.00

4 Controlled and 2 "Normal" Outlets
Item No SWTAC6-MP-4x2   Price $ 79.00

6 Controlled Outlets
Item No SWTAC6-MP-6x0   Price $ 79.00

Physical    12" W x 2.5" D x 1.5" H, 2 lbs.
Connectors  (2) RJ-11 TelCo/Control,
            (6) AC Receptacles
LEDs        (1) Power
Switches    (1) Main Toggle On/Off
Bell        None
Cable       (1) 5' RJ-11 Phone Cable
Adaptor     None
AC Power    115V/60Hz, 15 Amps


Computer Peripheral Systems, Inc.
5096 Bristol Industrial Way, Suite B
Buford, GA 30518
8:30 AM - 5:30 PM EST
Technical Support
(770) 945-0643
8:30 AM - 5:30 PM EST
(770) 945-9342

© Copyright 1996-2003  Computer Peripheral Systems, Inc.
This file last modified August 29, 2003