Basic Info.

Product Description

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)