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SUS 304 or Cold-roll steel sheet (Optional)
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
DESCRIPTION ITEM NO.ZD0110012
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.
GB4208-93 IP66 FCC
ITU-T Recommendations K21
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
MTBF:100000hours 4. MTTR: 2 hours
5. Connection: RJ11 screw terminal pair cable
Applicable for various types of SPC exchange
and dispatching exchange system with
feeding voltage of 33-60V.
. Ambient temperature:-30 ~ +60 degree
Atmospheric pressure: 86~106Kpa Circumstance noise:less than 60dB(A)
. Sound level of ringing:over 70dB(A).
. Standard frequency:low frequency group:697. 770. 852. 941Hz,
high frequency group:1209. 1336. 1477Hz, frequency deviation:-1.5% ~ +1.5%
. Call transmission index:(5KM)SLR<12,RLR<-1,stmr>10, output impedance is 600 Ohm.
maximum distance: 7KM
(maximum length of
each number is
Connection: RJ11 screw terminal pair cable (or RJ11 Socket of plug upon request) with stainless stee
==>>>>Product Detailed Pictures
==>>>>Please Email US
This product model:KNZD-11
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