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SOS Intercom

SOS Intercom

material:SUS 304 or Cold-roll steel sheet (Optional)

SOS Intercom-Analogue[KNZD-11]
SOS Intercom-VoIP KNZD-11(1)
sos intercom description

Sos intercom KNZD-11

Sos intercom is often called emergency intercom, which is mainly used in public places. When an emergency occurs, tourists can use intercom for help.
This intercom is a terminal device that transmits voice in both directions via voip. It is mainly composed of call button, indicator light, indicating sos. Intercom can only make point-to-point calls.

How SOS intercom works

Intercom communication is a communication technology that uses sound and electric energy to convert each other, and uses "electricity" as a medium to transmit language. The simplest form for two users to communicate is to connect two sos intercom with a pair of lines.
When the speaker is speaking into the microphone, the vibration of the vocal cords stimulates the air to vibrate, forming a sound wave.
Sound waves act on the microphone and cause it to generate an electric current, which is called voice current.
The voice current is transmitted along the line to the receiver of the counterpart radio n.
The receiver acts just the opposite of a microphone-it converts electrical current into sound waves and passes them through the air to the human ear.
This completes the simplest call process


1. Stainless steel 304 body for easy Installation.
2. Waterproof rating IP55 dust proof.
3. Full keypad with memory, 10 button programmable telephone.
4. Weather resistant to IP55 standard, service temperature range from -30 degree to +75 degree.
5. Lightening protection to ITU-T recommendation K.21.
6. Heavy Duty handset with hearing Aid compatible receiver, Noise canceling microphone.
7. Handset with industrial strong armored cord .
8. Metal keypad keep waterproof and dusty proof.
9.Phone integrity wiring to enable the telephone system to check if the telephone unit is still
Operational.(If PABX have this available we can provide this function).
10. Optional 7 minute time out to release the line if the handset is left off hook. This function upon buyer’s requirement).
11. The housing covered with a layer of reflective label for easy identification at night.Optional
12. Application: Tunnel, metro, railway, LRT, speedway, marine, ship,offshore, mine, power plant, bridge etc.


sos intercom size and installtion


EN55022: emissions                                         EN55024immunity

Ingress Protection: GB4208-93 IP66 FCC        ITU-T Recommendations K21

EMCEN50121(Railway application-Electromagnetic Compatibility)

sos intercom certificate


sos intercom packingr

Unit size:170*130*60mm           Unit: N.W:0.65KG 

1pcs packing box size: 200*140*100mm     Unit N.W:0.65KG  Unit G.W:1KG 

12pcs in 1 outer Carton box: size: 500*360*420mm  N.W:7.8KG  G.W:13.1KG 

==>>>> Product Specification


1. PSTN analogue telephone           2. DTMF dialing                

3. MTBF:100000hours                           4. MTTR: 2 hours                

5. Connection: RJ11 screw terminal pair cable

6. Applicable for various types of SPC exchange PABX and dispatching exchange system with

feeding voltage of 33-60V.
7. Ambient temperature:-30 ~ +60 degreeRelative humidity:10%~95%

Atmospheric pressure: 86~106Kpa Circumstance noise:less than 60dB(A)
8. Sound level of ringing:over 70dB(A).
9. Standard frequency:low frequency group:697. 770. 852. 941Hz,

high frequency group:1209. 1336. 1477Hz, frequency deviation:-1.5% ~ +1.5%

10. Call transmission index:(5KM)SLR<12,RLR<-1,stmr>10, output impedance is 600 Ohm.

maximum distance: 7KM
11Hotline setting (maximum length of each number is 16 digits)

12. Connection: RJ11 screw terminal pair cable (or RJ11 Socket of plug upon request) with stainless steel

cable protected

==>>>>Telephone System

sos intercom system

==>>>>Product Application

sos inercom use in elevator sos intercom application

==>>>>Product Detailed Pictures

sos intercom front view sos intercom back view sos intercom left view sos intercom right view sos intercom left side view sos intercom right side view

==>>>>Product Video