Weatherproof telephone

Key Attributes.

Description: Defend grade: GB 4208-93 IP 66 / IP 67 Call capability of phone: GB/T 15279-94 Application scope: metro, light railroad, speedway, ship, mine, etc. External configuration specification: External dimension: 320*205*120mm Weight: 5.5Kg Installment dimension:139*260mm M8 bolt is used to install Main features : 1. Cabinet:aluminum alloy die - casting, high anti-violent, able to glisten, convenient for looking for 2. Door cover:orient automatically and good self - closing, convenient for use. 3. Handset:made of special engineering plastic, high anti-knock resistance. high tensile strength resistance and high anti-violent. 4. All of the components including handset telephone receiver and transmitter, keypad, buzzer, circuit board and cabinet are designed to be multi - layer waterproof and dust - proof which is up to Class III grade. The whole machine is up to national standard GB4208-93 IP 66. 5. Phone is provided with high stability, high anti-jamming capability, and it is up to national standard GB/T 15279-94. Specification: 1. Applicable for various types of SPC exchange and dispatching exchange system with feeding voltage of 48-60V. 2. Ambient temperature:-30 ~ +60 degreeRelative humidity:10%~95% Atmospheric pressure: 86~106Kpa Circumstance noise:less than 60dB(A) 3. Sound level of ringing:over 70dB(A). 4. 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. 5. Call transmission index:(5KM)SLR<12,RLR<-1,STMR>10, output impedance is 600 Ohm. 6. Super strong function is available for dialing 12 groups of numbers stored in the memory (maximum length of each number is16 digits)