Electronic Hook Switch (EHS) cable eliminates the need for a handset lifter and lets you quickly answer and end calls. Easy-to-use design makes installing this cable quick and simple. Cable works with Cisco desk phones (not included) and may work with additional manufacturers.Electronic Hook Switch (EHS) cable eliminates the need for a handset lifter and lets you quickly answer and end calls. Easy-to-use design makes installing this cable quick and simple. Cable works with Cisco desk phones (not included) and may work with additional manufacturers.