NEC Analog Port Adapter with Ringing (Refurbished)(Model # 770220)
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- Incoming calls ring on devices installed to the APR-U Unit
- Each terminal with an APR-U Unit installed requires power from a NEC ACA-U AC Adapter for Optional Adapter Unit (Model 770310)
- Compatible with the NEC DTP-8D-1 - 8 Button Display Speakerphone (Model 590020)