Works With the Following NEC Phone Systems:
- NEC DT series:Â DT330, DT730, and DT750
- NEC DSX series:Â DSX 34B BL, DSX 34B FDX
- NEC DTR series:Â DTR 8, DTR 8D, DTR 16D, DTR 16LD, DTR 32D
- NEC DTH series:Â DTH 8, DTH 8D, DTH 16D, DTH 16LD, DTH 32D
- NEC DTL series:Â DTL 12D, DTL 24D, DTL 8LD, DTL 32D
Compatible Poly Wireless Headsets
The APN-91 Electronic Hook Switch (EHS) adapter is designed to work with multiple HP Poly (formerly Plantronics) wireless headset systems, providing remote call control for improved convenience and productivity. Compatible headset models include:
- Poly CS500 Series:Â Includes current CS540 models and discontinued versions such as the CS510, CS520, and CS530
- Poly Savi Series:Â Compatible with a wide range of Savi Office headsets, including the Savi 700 Series, 7200 Series, 7300 Series, and 8200 Series
- Poly Voyager Series:Â Works with various Voyager Office models
When used with the APN-91 adapter, these Poly wireless headsets provide full Electronic Hook Switch (EHS) functionality, allowing users to answer and end calls directly from their headset for a streamlined, hands-free communication experience.


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