APU-72 EHS for some Avaya, Cisco and Nortel Desk Phones #202578-01
Electronic Hook Switch Cable for remote desk phone call control (answer/end). This cable eliminates the need for a HL10 Handset Lifter. This cable works with some Avaya, Cisco and Nortel desk phones.
For more information download the EHS Guide click here
For complete compatibility info click here