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.
Click here for installation instructions.
EHS cables are designed to work with specific phone models and Plantronics products. The table below provides the compatibility information for the APP-5, APP-50, and APP-51.
|EHS Cable||Phone Make and Model||Compatible Plantronics Product|
Part No. 38438-01
Part No. 38439-01
|Same as above||CS500 Series:
Part No. 38439-11
|Same as above||Same as above|
* The difference between the APP-50 and APP-51 is that the APP-51 includes a connector for your on line indicator (OLI) light.