POLY Plantronics APU-72 Electronic Hook Switch, Avaya (Nortel®)/Cisco

Electronic Hook Switch Cable for remote desk phone call control (answer/end)
The Plantronics APU-72 Electronic Hook Switch Cable eliminates the need for an HL10 Handset Lifter when remotely controlling the answer/end function on your desk phone. It is compatible with Cisco and Avaya/Nortel phones as well as select others. It is also compatible with the Plantronics On-Line Indicator accessory.
Intended for: VoIP phone