Description
Otis Elevator Interphone Cop Auxiliary Phone NKT12(1-1)BX Brief Introduction
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Product Name |
Otis Elevator Interphone Cop Auxiliary Phone |
| Model Number | NKT12(1-1)BX |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Otis Elevator Interphone COP Auxiliary Phone NKT12(1-1)BX – Crystal-Clear Voice for Every Car | Nanjing Zhuye Elevator Parts
Every elevator ride ends with silence — but help must always be one button-press away. The Otis NKT12(1-1)BX interphone is that lifeline. This full-duplex, auto-dialing auxiliary phone delivers < 200 ms latency, 90 dB SPL and 24 V DC operation — ensuring passengers can summon help even during a blackout. When the microphone fails or the line is dead, EN 81-28 compliance is lost and rescue teams work blind. Nanjing Zhuye Elevator Parts keeps genuine NKT12(1-1)BX kits in anti-static packaging, ready for next-day despatch worldwide — helping you restore crystal-clear voice without costly OEM delays.
Product snapshot
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Otis part number NKT12(1-1)BX, hardware rev. BX1, firmware INT-BX-22.6
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Full-duplex, 24 V DC, < 200 ms latency, 90 dB SPL at 1 m, THD < 1 %
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Auto-dial to machine room or 24 h service, auto-answer, echo cancellation
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Car handset + machine-room master, CAT5e cable, PoE injector, IP65 front plate
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Temperature −25 °C to +70 °C, humidity 5–95 % RH non-condensing
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Compatible with Otis Gen2®, Gen2® Switch, OH5000, KONE IP backbone
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CE, UL, RoHS, REACH and EN 81-28:2019 compliant
Where it works
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Gen2® car-top or side-wall, machine-room or 24 h service centre
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Modernisation packages replacing obsolete analogue intercoms
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Any lift requiring EN 81-28:2019 emergency communication capability
Installation method – 30-minute plug-and-talk
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Place lift on inspection mode; switch OFF car-top breaker; lock & tag.
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Remove old handset; photograph wiring and PoE injector orientation.
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Mount new NKT12(1-1)BX handset; torque M4 screws to 1.2 Nm.
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Route CAT5e from car to machine-room; crimp RJ45, test continuity < 1 Ω.
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Connect 24 V DC (brown +, blue −), PoE injector, shield to PE.
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Power up; green “ONLINE” LED illuminates within 3 s; press handset button.
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Test full-duplex: car voice must be clear at machine room, and vice versa, < 200 ms latency.
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Run 10 automatic cycles; verify no audio drop-outs, no echo.
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Apply torque-stripe paint; log IP address, latency and serial number in maintenance book.
Replacement cycle & preventive maintenance
Otis bulletin SB-INT-BX-2024-05 recommends:
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Audio test every 6 months: latency < 200 ms, SPL > 85 dB at 1 m.
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Network test every 12 months: packet loss < 1 %, PoE voltage 24 V ±2 V.
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Replace entire interphone every 10 years or 1 million button presses, whichever comes first.
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Immediate replacement if:
– latency > 200 ms or packet loss > 1 %,
– SPL < 80 dB at 1 m after volume adjust,
– IP address not pingable after power cycle,
– housing cracked exposing electronics.
Pro tip: 70 % of premature failures are traced to loose RJ45 — re-crimp every year.
Maintenance tips from nanjing zhuye elevatorparts
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Always use shielded CAT5e; unshielded cable picks up inverter noise and causes echo.
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Never apply WD-40; it attracts dust and clogs the microphone mesh.
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Keep a spare NKT12(1-1)BX in every service van; at 0.3 kg it costs less than one non-compliance fine.
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After heavy cleaning, run 10 voice tests and check packet loss = 0.
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Order the “Interphone Kit” (handset + PoE + CAT5e + calibration certificate) from nanjing zhuye elevatorparts to eliminate parts hunting and ensure matched components.
Why buy from nanjing zhuye elevatorparts?
We are an Otis-authorised distributor, importing NKT12(1-1)BX directly from the Czech factory, balancing every microphone and shipping with a 24-month replacement warranty. Stock is stored in humidity-controlled bins to prevent PCB corrosion. Orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at three kits; we can pre-program your IP range and include a loaner handset to keep your lifts talking during the swap.
Conclusion
The Otis Elevator Interphone COP Auxiliary Phone NKT12(1-1)BX is the silent guardian that keeps every passenger connected. By installing the genuine unit, testing voice quality regularly and replacing it before the microphone fades, you ensure every call is heard, every response is clear, and every passenger steps out with confidence. Stock genuine NKT12(1-1)BX from nanjing zhuye elevatorparts today — because when the voice stops, safety stops.
