Electronic Hook Switch- communicates electronically with the phone, eliminating the need for a conventional mechanical HL10 lifter.
The EHS adapter is unique to a specific Telephone application & Wireless product
APN-91 is designed for Plantronics Wireless Savi and new CS500 series products.
Supported Phones NEC
NEC DSX 34B BL, DSX 34B FDX, DTR Series (DTR 8, DTR 8D, DTR 16D, DTR 16LD, DTR 32D) , DTH Series (DTH 8, DTH 8D, DTH 16D, DTH 16LD, DTH 32D), DTL series (DTL 12D, DTL 24D, DTL 8LD, DTL 32D), DT 330, DT 730 and DT 750 (requires NEC tech to Program)