NEC DTH-1-1 Single Line Telephone (780034, Black, Refurbished)NEC DTH 1 1 Single Line Telephone (780034) The NEC DTH 1 1 (Part #780034) is a simple and reliable single line analog telephone designed for basic communication needs. With a compact design and straightforward functionality, it is ideal for lobbies, break rooms, warehouses, and other low use environments. Built for durability and ease of use, this phone provides consistent voice communication without unnecessary complexity, making it a cost effective