Electronic Hook Switch Cable for remote desk phone call control (answer/end).
Alcatel 4029, 4039, 4028, 4038, 4068
This cable eliminates the need for a HL10 Handset Lifter and works with Alcatel
desk phones and may work with additional manufacturers, check with our
Plantronics Product Configurator for more information.
Replacement Note: The APA-23 EHS cable replaces the APA-20 and
APA-22 cables and features compatibility with the
Plantronics On-line Indicator accessory.
Support- http://www.plantronics.com/au/support/product/apa-23