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NEC DSX 34B black desk phone with backlit display and 24 programmable keys

NEC

NEC DSX 34B Telephone Accessory 24 Keys Backlit Display 1090021

SKU CH-S91J-H6BNR

Adds 24 programmable keys, 10 speed dials and a backlit display to NEC DSX 40, 80 or 160 systems

  • TypeTelephone System
  • 24 programmable keys adapt the phone to your workflow
  • 10 dedicated speed-dial keys give one-touch access to frequent contacts
  • 4 context-sensitive soft keys simplify on-screen navigation
  • Backlit display and dial pad ensure readability in low light
  • Compatible with NEC DSX 40, 80 and 160 KSU systems

Compatible KSU Systems

This accessory works exclusively with NEC DSX 40, 80 and 160 key service units. It cannot be used with other telephone platforms or standalone VoIP endpoints. Buyers whose infrastructure uses a different KSU will need a matching handset instead.

Installation Notes

The unit connects to the supported KSU using the system’s proprietary station wiring; no separate power supply is required. Miswiring the station cable or connecting to an unsupported KSU are the most common reasons the display and programmable keys remain inactive.

Practical Limits

Only the 24 programmable feature keys, 10 speed-dial keys and 4 soft keys defined by the DSX system are available; additional line appearances or custom key mappings beyond this set are not supported. The backlit display and dial pad operate at the fixed brightness and contrast levels set by the KSU firmware.

Highlights

  • 24 programmable keys adapt the phone to your workflow
  • 10 dedicated speed-dial keys give one-touch access to frequent contacts
  • 4 context-sensitive soft keys simplify on-screen navigation
  • Backlit display and dial pad ensure readability in low light
  • Compatible with NEC DSX 40, 80 and 160 KSU systems

Specifications

TypeTelephone System

Questions about this item

How do I verify the backlit display and dial pad are working after connecting the DSX 34B to the KSU?

The backlit display and dial pad should illuminate immediately when the phone is connected to a compatible NEC DSX 40, 80 or 160 KSU and receives power.

What comes with the DSX 34B and do I need to buy the KSU separately?

The accessory includes the handset and base unit with 24 programmable feature keys, 10 speed dial keys and 4 soft keys. The NEC DSX 40, 80 or 160 KSU is required and sold separately.

Which KSU model should I pair with the DSX 34B — the 40, 80 or 160?

Choose the KSU that matches your system capacity: DSX 40 for up to 40 ports, DSX 80 for up to 80 ports, or DSX 160 for up to 160 ports. The phone works with all three.

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