NEC DTU-8-1 Digital Office Phone Black 8-Button PBX Desk Telephone KTS

NEC DTU-8-1 Digital Office Phone Black 8-Button PBX Desk Telephone KTS

The NEC DTU-8-1 is an 8-button digital desk telephone designed for use with NEC Key Telephone Systems (KTS). It connects directly to an NEC PBX or KTS line card, delivering full digital audio and feature access — including line selection, hold, transfer, and speakerphone — without requiring an analog adapter. The phone is finished in black (model designation DTU-8-1(BK)TEL) and features a compact upright desktop form factor.

Specifications & What's Included

• Model: DTU-8-1 (full part number: DTU-8-1(BK)TEL)
• Stock No.: 770010
• Color: Black
• 8 programmable line/feature buttons with indicator LEDs
• Standard 12-key dial pad
• Function buttons: Hold, Transfer, Answer, Speaker, Recall, Redial, Feature, Conf
• Built-in speakerphone (Speaker button on front panel)
• MIC port on front lower panel
• Headset jack (RJ-style) on the base — labeled HEAD SET
• Line connection: RJ-style modular jack on underside
• Compatible with NEC KTS (Key Telephone System) only
• Manufactured by NEC Technologies (Thailand) Co., Ltd.
• Country of manufacture: Thailand
• FCC Part 15 compliant
• Includes: phone with handset and coiled handset cord only — no line cord or headset included

Applications

The NEC DTU series are digital terminal units built specifically for NEC's KTS and NEAX/UNIVERGE PBX platforms, including systems such as the NEC NEAX 2000, NEAX 2400, DSX, and ASPIRE series. In a business phone system, each DTU set connects to a dedicated digital port on the KTS main unit or expansion cabinet, allowing the system to deliver features like call forwarding, conferencing, and direct station select through the buttons on the set itself. The DTU-8-1 is the entry-level 8-button variant in the DTU line — well suited for general office staff positions that need basic multi-line access without a large button array. These phones remain in active use in offices and small businesses that still run NEC KTS or legacy NEAX/UNIVERGE PBX systems, and are commonly sought as replacement handsets when an existing set fails.