China Promotion Waterproof Telecom Speed Dial Call Button Outdoor Emergency Intercom

Promotion Waterproof Telecom Speed Dial call Button Outdoor Emergency intercom

Ms. Miki Mo
M: +86 135 3042 8923
It is specially designed to use in high wet environment of all kinds of electric power tunnel, with the characteristics of high protection, and low power consumption. A line can support 10 sets of telephones, and the standard of DTMF code sending exceeds 10 kilometers. With 1W speakers built-in, voice is clear and loud. The transmission distance could reach to 10 kilometers without additional power supply.
1. Product features
Automatically dial with one button
Call time limited
Send address code of this machine, and code sending time can be adjustable
High waterproof, dustproof performance, full aluminum phone cover, IP66 protection grade.
Sprayed with imported reflective lacquer on the surface, bright color, 5-10 years not fading, completely conform to the standards of GB/T5237.2-2000.
2. Scope of application
It is applied to highway for emergency call, railway or subway for interval telephone call, and tunnels, electric tunnels for maintenance call.
3. Technical Parameters

Ambient temperature-30 ~ +60 degreeRelative humidity10%~95%Atmospheric pressure86~106Kpa Circumstance noise:less than 60dB(A)Sound level of ringingover 70dB(A)

Standard frequency:low frequency group:697. 770. 852. 941Hz,
high frequency group:1209. 1336. 1477Hz, frequency deviation:-1.5% ~ +1.5%
If service line is a 3Km signal - level:
Standard frequency:low frequency group:-12dB~-6dB, high frequency group:-10dB~-4dB, level difference between low and high frequency of compound signal:0dB~3dB, the total distortion caused by intermodulation of harmonic wave is lower than the basic level by at least 20dB.
Call transmission index:(5KM)SLR<12,RLR<-1,STMR>10, output impedance is 600 Ohm
Parameters is kept in EEPROM, no losing with power-fail.

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Ms. Miki Mo
M: +86 135 3042 8923