Industrial telephone KNSP-04D12B

analogVoIPSIP

Tunnel Telephone KNSP-04 We are a Tunnel telephone manufacture. we produce large quantity of Tunnel telephone and export to many countries. Tunnel telephone are widely used in railway trackside. Most of metro line under ground inside the tunnel need to install Tunnel telephone. 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. 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. Technical Parameters 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 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. An outer metal casting, sealing, waterproof rating to IP66. Using this telephone, to meet the communication requirements for outdoor, and not easily damaged, long life, good stability.