What is the NEC DTU-16D-2?
The NEC DTU-16D-2 is a network/telecom equipment component, listed by the manufacturer as "HEARING AID COMPAT PHONE SET". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Manufactured by NEC, the DTU-16D-2 (HEARING AID COMPAT PHONE SET) 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 DTU-16D-2 is a network/telecom equipment component, listed by the manufacturer as "HEARING AID COMPAT PHONE SET". 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 DTU-16D-2, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue