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.
EHS cables are designed to work with specific phone models and Plantronics products. The table below provides the compatibility information for the APA-2, APA-20, and APA-23.
|EHS Cable||Phone Make and Model||Compatible Plantronics Product|
Part No. 38348-01
Part No. 37819-01
|Same as above||CS500 Series:
Part No. 38908-11
|Same as above||Same as above|
* The difference between the APU-20 and APU-23 is that the APU-23 includes a connector for your on line indicator (OLI) light.