• Products & Solutions
  • Partners
  • Support

Support Knowledge Base

Support
Search Knowledge Base

APP-5/APP-50/APP-51 (Polycom 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 APP-5, APP-50, and APP-51.

EHS Cable Phone Make and Model Compatible Plantronics Product
APP-5
Part No. 38438-01
 
Polycom
  • SoundPoint IP 320/321
  • SoundPoint IP 330/331
  • SoundPoint IP 430
  • SoundPoint IP 550
  • SoundPoint IP 560
  • SoundPoint IP 650
  • SoundPoint IP 670
  • VVX 1500
CS Series:
  • CS50
  • CS55
  • CS70/CS70N
  • CS351N
  • CS361N
APP-50*
Part No. 38439-01
Same as above CS500 Series:
  • CS510
  • CS520
  • CS530
  • CS540
Savi 700 Series:
  • W710
  • W720
  • W730
  • W740
  • W745
Savi Office:
  • WO100
  • WO200
  • WO300
  • WO350
MDA200
APU-51*
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.

Search Results

Sign up to receive news and exclusive offers from Plantronics