CPS - Products



About CPS

Product Categories
   · Telephone Line Sharing
   · Dial Security
   · ReBooting &
      AC Power Control
   · Remote Switching
   · RS-232
   · Controllers
   · Software
   · 50 Products
   · Alphabetic Listing

   · Ordering
   · Warranty
   · Discounts
   · Return Policy/Demos

   · Tech Tips
   · Wish List
   · Best Way



With Local or Remote Control
... a different twist on AB switches

Connects any Device or Network on Port A
to Ports B-C-D or S, Locally or Remotely

AB-M Front
AB-M Front Picture
AB-M Back
AB-M Rear Picture


AB-M Application Diagram

Also See "Tech Tips" - Switching Fifty Devices


  • Security Port for No Connection
  • Solid State Relays for Noise Free Transitions
  • Manual Push Button Control
  • RS-232 Serial Port to Enter Switching Commands
  • Remote Control Through CPS Remote Controllers
  • (Telephone line/ TCP/IP ) Password Protection
  • Addressable, Up to 31 Units Daisy Chained from One Controller
  • CPS Addressable AC power control units can be inter-mixed in the chain

The AB-M provides the same basic peripheral sharing functions as the familiar manual A/B/C/D switch boxes that the industry grew up with.

However, these switches are controlled through an RS-232 connection (an RS-232 Filtered Adapter is required) or remotely through one of CPS's Remote Controllers (SP-RRC, 3P-RRC or N-RRC), as well as manually (push button). This opens the door to other network switching applications such as Remote back-up, Security, Resource Allocation, etc., in addition to the peripheral sharing functions.

The Controllers provide the desired type of communications interface (Phone Line or TCP/IP). They also add password security, and the ability to share a phone line as well as other programmable features. The controllers are the same as those that are used for the CPS rebooting products. They follow the same flexible "Base Unit + Controller" concept.

The A/B-M connect a common device on port A to either of its slave ports B/C/D/S. "S" is a logical security port (no connection).

It is available in Three or Four port models with:

  • RJ-11 connectors for telephone phone line switching applications (4 wire)
  • RJ-45 connectors for switching Ethernet, Token Ring or T1 circuits (8 wire).
  • DB-9(25)/RJ-45 adapters are available for 8 wire RS-232 switching applications.

The AB-M Switches are also dip switch addressable. Up to 31 of them can be daisy chained from one RS-232 Port or one Single Port Controller. A Multi Port Controller can support a daisy chain from each port. As an example, a 3P-RRC (three port controller) could support up to 93 AB-Ms (31 per port). An eight port controller can support up to 248 AB-Ms.

They connect to the controllers, and to each other, with standard RJ-11 telephone cables at a combined distance of up to 2000 feet. Any of the addressable CPS AC power control "Base Units" can also be intermixed within the same "daisy chain" (IPN, U-X1, or U-X3) for additional application flexibility.

Additional devices can also be switched to Port A by wiring multiple units together.


The A/B  Command A typical RS-232 serial command to connect port (B)-2 to port (A)-1 (common) may look like:

* AD 2# (Use Hyper-term or any terminal emulator.)

* is an attention command for the AB-M since there is no controller to wake it up.
AD is the address of the Switch if daisy chained (01-31).
2 is the Port that is going to be connected to port (A)-1.
# terminates the command.

If this command were sent through a Touch-tone controller you would precede it with the commands for the controller and it would look like this:

#8 PASS 1 AD 2#

#8 is the attention command for the controller that you are using.
PASS is the controllers password (consult the controller manual).
1 is the port on the controller (for multi-port controllers).
Controller Touch-tone commands can be entered manually or appended to the AT dial string.

Need an extra RS-232 port?  Consider the USB to Serial Adapter.


A/B SWITCH (3 port/RJ-11)
Item No SWTABC-4W           Price $145.00 

A/B SWITCH (3 port/RJ-45)
Item No SWTABC-8W           Price $170.00 

A/B SWITCH (4 port/RJ-11)
Item No SWTABCD-4W          Price $165.00 

A/B SWITCH (4 port/RJ-45)
Item No SWTABCD-8W          Price $190.00 

Physical    4.5" W x 3" D x 1.25" H, 1 lb.
Connectors  (2) RJ-11 Control/Concatenation Ports
            (3-4) RJ-xx Port
LEDs        (5) Power and Port Connect Status
Switches    (1) 8-Bit Dip, (1) Pushbutton
Bell        None
Cable       (1) 5' RJ-11 Phone Cable
Adaptor     None
AC Power    Wall Mount 9VAC 1A, 115V/60Hz

-------------- CONTROLLERS --------------

Required for Remote Control.
See the specific Controller for additional specifications

SP-RRC One Telco Line and One Control Port (to AB-M)

3P-RRC One Telco Line and Three Control Ports (to AB-M)

NETWORK Controller
N-RRC One RJ-45 TCP/IP Network Connection and One Control Port (to AB-M)

-------------- ADAPTERS -----------------

Required for Serial Port Control (to PC)
Item No CA9R11-IPN-F        Price $25.50

Physical    2" W x 1.5" D x .75" H, .5 lbs.
Connectors  DB-9 Female, (1) RJ-11
LEDs        None
Switches    None
Bell        None
Cable       None
Adaptor     None
AC Power    None

RS-232 Port Adapters to Connect to RS-232 Devices (to Peripherals)
RJ-45 to DB-9 Male (8 Wire)
Item No CA9R45-28M          Price $8.75

RJ-45 to DB-25 Male (8 Wire)
Item No CA5R45-28M          Price $8.75

RJ-45 to DB-9 Female (8 Wire)
Item No CA9R45-28F          Price $8.75

RJ-45 to DB-25 Female (8 Wire)
Item No CA5R45-28F          Price $8.75

Physical    2" W x 1.75" D x .5" H, .25 lbs.
Connectors  (1) DB-25 or DB-9 Male or Female,
            (1) RJ-45 RS-232
LEDs        None
Switches    None
Bell        None
Cable       None
Adaptor     None
AC Power    None

Computer Peripheral Systems, Inc.
5295 Webb Parkway NW
Lilburn, GA 30047
(770) 638-8658 x5
8:30 AM - 5:30 PM EST
Technical Support
(770) 638-8658 x5
8:30 AM - 5:30 PM EST
(770) 945-9342

© 1996-2022 Computer Peripheral Systems, Inc.
This file last modified April 6, 2022