Shopping Cart

Product Quantity Price Subtotal
Cart Subtotal

Support Knowledge Base

Search Knowledge Base

APT-3/APT-30/APT-31 (Avaya/GmbH/Tenovis EHS Cable) Product Information

Electronic Hook Switch (EHS) cables provide communication between your phone and Plantronics headset, enabling you to answer and end your calls using your headset call control button.

Installation Information

Click here for installation instructions.

Compatibility Information

EHS cables are designed to work with specific phone models and Plantronics products. The table below provides the compatibility information for the APT-3, APT-30, and APT-31.

EHS CablePhone Make and ModelCompatible Plantronics Product
Part No. 38349-01
  • T3 Classic with Interface Adapter
  • T3 Classic with Interface Adapter, TH13, TM13
CS Series:
  • CS50
  • CS55
  • CS70/CS70N
  • CS351N
  • CS361N
Part No. 37820-01
Same as aboveCS500 Series:
  • CS510
  • CS520
  • CS530
  • CS540
Savi 700 Series:
  • W710
  • W720
  • W730
  • W740
  • W745
Savi Office:
  • WO100
  • WO200
  • WO300
  • WO350
Part No. 37820-11
Same as aboveSame as above

* The difference between the APT-30 and APT-31 is that the APT-31 includes a connector for your on line indicator (OLI) light.

Search Results

Sign up to receive news and exclusive offers from Plantronics