Click image to enlarge


The 40-656A-001 is a 38-channel multiplexer with 2-pole switching, suitable for signals to 2 Amp, 220VDC/125VAC. It offers the highest switching density in its class for medium power/voltage signals. 

Specifically designed for switching POTS, ISDN or xDSL telephony signals. Bandwidth for most configurations is typically >25MHz. It is paired with a very similar module, 40-655A-001, a multi-banked multiplexer. 

Please contact Pickering sales office for more assistance with Telecom switching applications. 

NOTE: This module supersedes the 40-656-002 which is still available but is not recommended for new designs.

Key Features

  • High Density Multiplexer for Telecommunication Applications
  • 38-Channel Multiplexer
  • 2-Pole Switching
  • Operating Speed <3ms
  • Switch up to 220VDC/125VAC, 2A with 60W Max Power
  • VISA, IVI and Kernel Drivers Supplied for Windows
  • Supported by PXI or LXI Chassis
  • 3 Year Warranty
* Note: Product image above may be a different model in this range and is for illustrative purposes only

Product specifications

If no specifications are present, please see the product datasheet in this section. 

Please note: In some cases, for products like our Scalable LXI Chassis, the specifications can be found on the datasheets for the associated plugin modules that are inserted into these chassis. To find these modules, go to the "Also in the Range" link above.

Need to narrow down your search by specifications, try our Product Selector

Product Type: Multiplexers
Platform: PXI
Switch Type: EMR
Max I (A): 2
Max V DC: 125
Poles: 2
Banks: 1
Channels: 38


PDF Datasheet
Includes full information and specifications
PDF, 956.1 KB
PDF Manual
Includes manual, extended specifications, installation instructions and data
PDF, 2.89 MB
Related 78-pin D-type Connector Accessories Datasheet
A complete list and documentation for mating connection accessories
PDF, 4.08 MB
Software drivers & downloads for Switching & Simulation Products

Find CAD 3D Models downloads for products here.

Kevin Wheeler

Regional Sales Manager

Kevin manages all of Canada and the New England & Mid-Atlantic regions in the United States; these consist of the following:

CT, DE, ME, MD, MA, NH, NJ, NY,  RI, VT, VA, & DC

Find the local rep/agent in your area here >>

Tim Rhodes

Regional Sales Manager

Tim manages Latin America and the following states in the United States: 

  • AK, AZ, AR, CA, CO, HI, ID, LA, MT, NV, NM, OK, OR, TX, UT,  WA, WY

Find the local rep/agent in your area here >>

Tom Sarfi

Business Development Manager

Tom manages the following states in the United States: 

  • AL, FL, GA, IL, IA, KS, MN, MS, MO, NE, NC, ND, PR, SC, SD, TN & WI

Find the local rep/agent in your area here >>

James Gould

North American Sales Manager

James manages the following states in the United States: 

  • IN, KY, MI, OH, PA & WV

Find the local rep/agent in your area here >>

Need Help´╝č

Pickering Partner Program

Our worldwide network of partners offers a variety of services from integration to consulting.

Partner Information


Information on software drivers, product comparisons and technical support for our entire product range.


Product Selector

This tool will help you narrow down our offering to get you the correct switch and simulation solution you need.

Try the selector

Resource center

Success storiesproduct videos and more—find the information you need about our switching and simulation.

Resources you need

Worldwide presence

Find support across the globe, with offices and agents in the Americas, Europe and Asia. 

Find local office or agent

Can't find the product you need?

Filter our database of 1000s of products to your exacting specifications.

Try Product Selector

No thanks