KNSP-04 Handsfree intercom with door cover and push button
rugged telephones waterproof IP66 dusty proof for -outdoor environment. Tough telephones with door and handsf ree hotline call. work on in rugged conditions in analogue and VOIP.
As Public telephone for indoor or outdoor, Taxi or bus stands or station, Highway call box, Railway, metro, ATM machines side, Tunnel, Port, Dock, Mines, Generation facilities...
A good ideal telephone for use in wet or corrosive atmospheres
TAG:   Handsfree intercom waterproof telephone industrial telephone tunnel telephone emergency telephone
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.
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.
Ambient temperature:-30 ~ +60 degreeRelative humidity:10%~95% 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% If service line is a 3Km signal - level:Standard
Ffrequency:low frequency group:-12dB~-6dB High frequency group:-10dB~-4dB
Level difference between low and high frequency of compound signal:0dB~3dBT 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.
Automatic dial-up function: press dial-up keys, 3 ~ 5 seconds for you will be designated to dial the number.
Call time limited: Automatically start seven minutes timing when connecting a telephone. When time is up, phone automatically hangs up in order to prevent lines occupied because of long conversation.
Send address code: Press the answering button when there is a phone call. Then send address code within 2s after answering. When call out, press the call button, send out this phone address code within 1-63s.Achieve the function of delay time through the internal dial-the-code switch.
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