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 to view installation instructions for the APV-6A, APV-62, and APV-63.
  EHS cables are designed to work with specific phone models and Plantronics products. The table below provides the compatibility information for the APV-6A, APV-62, and APV-63.

EHS Cable	Warranty	Phone Make and Model	Compatible Plantronics Product
APV-6A Part No. 83681-01	1  year	For HIS wired connections, the supported phones are Avaya 1608 1616 9608 9611 9620 9620L 9630 9640 9641G 9650 9670 For HIC wired connections, the supported phones are Avaya 1408 1416 2410 4630 5410 6416D+M 6424D+M 9404 9406 9504 9508	CS Series: CS50 CS55 CS70/CS70N CS351N CS361N
APV-62* Part No. 38734-01	2 years	Same as above	CS500 Series: CS510 CS520 CS530 CS540 Savi 700 Series: W710 W720 W730 W740 W745 Savi Office: WO100 WO200 WO300 WO350 MDA200
APV-63* Part No. 38734-11	2 years	Same as above	Same as above

* The difference between the APV-62 and APV-63 is that the APV-63 includes a connector for your on line indicator (OLI) light.