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Emergency Fire Telephone

Emergency Fire Telephone


Fire-alarm-telephone KNZD-41
Emergency Fire Telephone is set up in the subway tunnel fire alarm call, the phone belongs to alarm telephone system terminal. When the fire, break the glass automatic alarm to the world.
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emergency fire telephone

KNZD-41 fire alarm telephone

        The emergency fire telephone will be designed to work on railway,metro,tunnel,ect.Housed in robust metal box sus304 die cast with door,it will offer protection against the outdoor environment,vandals resistance and rot resistance.The unit will meet all the latest European/UK standards for EMC and US FCC,telephonty,waterproofing IP65 or IP66 and lightening protection together with offering the level of performance and reliability demanded in such an environment.

Loudspeaker and lights to remind function:

      When the noise more than 90dbs,the ordinary telephone ring often cannot let the staff heard, and lead to production scheduling command cannot be communicated in a timely way, causing economic lossed. KNZD-41 can amplify the ringing sound with light reminds, broadcast through the speaker. To count the ring at the same time, the phone automatically pick-on after it ringing several times (factory set to 3-5times),  the caller can use the broadcast to call. The sound will be sent to nearby worker and maintenance personnel by the native built-in hi-fi loudspeaker broadcast. 

      The product with built-in back-up power to ensure worl normally after power outage for two hours. When the power supply back to normally will chage for the battery. To ensure that each power backup power supply of storage. The bottom of the phone has a small exhaust fan, extend the service life of regenrative power work mainly guarantee the air circultaion inside the case.

      KNZD-41 phone have good stability, strong anti-interference ability, the handset use the moving coil, electret construct, eliminate background noise, the phone rang the bell with green led lights flashing at the same time.
During the phone in standby, 24V power supply automatically shut down,and only under the fluid flow trigger turned on the power,make the machine work more safety and reliable.

Telephone Features

1.Robust metal sus 304 body.

2.dustproof keypad flash mounted.

3.Weather resistant to IP65 or IP66 standard,service temperature range from:-35℃to75℃.

4.Magnetic reed hook-switch.

5.Telephone line powered.

6.Lightening protection to ITU-T recommendation K.21.

7.Handset:made of special engineering plastic,high anti-knock resistance,Weatherproof,armoured cable optional.

8.Hearing Aid compatible receivcer,Noise canceling microphone.

9.Auto off.When detect buzy tone,the phone will auto off to release line to avoid engage.

10.Selectable 7 minute time out,to release the line if the handset is left off hook.

11.Vandal resistant and tamper-resistant hardware.

12.Easy installation/replacement.

13.Adjustable ringer and volume control optional.

Fire Alarm Feature

power supply:

Telephone part:line powered.

internal 24V DC for amplifier from built-in UPS or battery 

internal 24V DC for flash strobe light from built-in UPS OR Battery.

external 230V AC 50Hz, 2 hours of backup power(UPS or battery)

The siren(alarm) red flash strobe light and siren sound greater than 120dB.

Telephone Feature

1.Applicable for various types of SPC exchange and dispatching exchange system with feeding voltage of 28v-60v.

2.Ambient temperature:-35-75℃ Relative humidity:10%-95% Atmospheric pressure:86-106Kpa Circumstance noise:≤60db(A).

3.Sound level of ringing:70-85db(A).

4.Call transmission index:(7KM)SLR≤12,RLR≤-1,STMR≥10,OUTPUT impedance is 600Ω.

5.Normal outgoing call or speed dial with memory.

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Main PCB

1.Well treated PCB used inside the phone.

2.Robust screw terminals used for the connection of ringer,handset,line in,hookswitch.

3.Selectable 7 minute time out,to release the line if the handset is left off hook.

4.All connectors be greased in production.


1.Kirk electro dynamic transducer for both handset transmitter and receiver.

2.Spring cable or armoured cable to attach the handset to the telephone main unit.

3.Stainless steel cable to connect exchange.

4.Inductive coupler fitted for hearing aid compatibility.

5.Handset integrity wiring to enable exchange to check if the phone is still operational.


Connection type:Rj45 Socket inside sealed enclosure 

Power supply:External 5V dc

Call set-up Protocol:Session Initiation Protocol(SIP)

Configuration:DHCP or STATIC IP address provisioning

emergency fire telephone design

      EMC:EN50121(Railway application-Electromafnetic Compatibility)
      ITU-T Recommendations K21
Packing detail:
      Until size:450*350*220mm,N.W:5.3KG
      1pcs in each inner CTN box,size439*227*191mm N.W:7.1KG

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