Plantronics Electronic Hook Switch (EHS) #38350-11 allows for "one-touch" remote answer/disconnect calls while roaming around your office with a Plantronics wireless headset. This eliminates the need for using the HL10. This device is designed for usage following Cisco phones that support Electronic Hook Switch:Cisco 7942G
Cisco 7945G
Cisco 7962G
Cisco 7965G
Cisco 7975G
Use with the following Plantronics wireless headsets:
CS50
CS55
CS70
CS70N
CS351/ CS351N
CS361/ CS361N
CS 500 Series
MDA200
Savi 700 series