What is the NEC DTR-16D-1?
The NEC DTR-16D-1 is a network/telecom equipment component, listed by the manufacturer as "NEC DTERM SERIES I Black Phone". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Manufactured by NEC, the DTR-16D-1 (NEC DTERM SERIES I Black Phone) is a network/telecom equipment component. Circular Telecom sources, tests, and resells surplus and refurbished NEC equipment like this as part of a lower-carbon alternative to new procurement.
Common Questions
The NEC DTR-16D-1 is a network/telecom equipment component, listed by the manufacturer as "NEC DTERM SERIES I Black Phone". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
Circular Telecom sources and resells surplus and refurbished NEC network equipment, including parts such as the DTR-16D-1, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue