CPE Splitter with EMI Suppression

CPE Splitter with EMI Suppression product image
CPE Splitter with EMI Suppression-1 product image
CPE Splitter with EMI Suppression-2 product image
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Product Description

The Comtest Universal EMI Splitter is the same design as our standard Universal POTS Splitter and has the added benefit of a built in Common Mode EMI Filter.

Differential signaling is used in telecommunication utilizing twisted pairs. One of the main advantages of differential signaling is increased resistance to electromagnetic noise which is achieved only if twisted pairs are well balanced. Both Tip and Ring receive interfering signals with the same amplitude and phase. Due to the fact that twisted pairs are transferring signals in differential mode (signal on Tip minus single on Ring), the perfect balance will result in any couple signals on tip and ring being cancelled.

In the real word, twisted pairs are not perfectly balanced and as a result, interfering signals on Tip and Ring are not the same in amplitude and phase. Coupled signals on Tip and Ring will not be cancelled. The Common Mode EMI Filter provides insertion loss of 30dB of couple signals (Electromagnetic interference signals) without adversely affecting the DSL signal (differential mode). This helps to reduce the effect of EMI on DSL signals.

Product Benefits

  • Insulation Displacement Connectors for quick connect, or Optional RJ11
  • Small insertion loss in differential mode, typically less than 0.25dB
  • High Common Mode Insertion Loss, typically higher than 30dB
  • Secondary lighting/surge suppression
  • Compliant to Telcordia and CSA/UL Standards


Dimensions53mm(H) x 98mm(W) x 13mm(D) (2” x 3 7/8” x 1/2”)
MountingWall mount (accepts two #8 or #10 wood screws)
Operating Temperature-40 to +65 °C (-40 to 149 °F)
Weight70g (0.15lbs)
Communications InterfaceConnects to xDSL, POTS service, and local Loop using either RJ-11 connectors or Gel-filled Insulation Displacement Connectors (22AWG, 24AWG or 26AWG solid conductor type)
Capacity1 Subscriber loop per line unit

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