Description:
Defend grade: GB ******3 IP *6 / IP *7
Call capability of phone: GB/T *******4
Application scope: metro, light railroad, speedway, ship, mine, etc.
External configuration specification:
External dimension: **0***5***0mm Weight: 5.5Kg 
Installment dimension:**9***0mm 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 GB******3 IP *6.
5. Phone is provided with high stability, high anti-jamming capability, and it is up to national standard GB/T *******4.

Specification: 
1. Applicable for various types of SPC exchange and dispatching exchange system with feeding voltage of ****0V.
2. Ambient temperature:**0 ~ **0 degreeRelative humidity:*0%~*5%
Atmospheric pressure: *6~**6Kpa Circumstance noise:less than *0dB(A)
3. Sound level of ringing:over *0dB(A).
4. Standard frequency:low frequency group:**7. **0. **2. **1Hz,
high frequency group:***9. ***6. ***7Hz, frequency deviation:*1.5% ~ *1.5%
If service line is a 3Km signal - level:
Standard frequency:low frequency group:**2dB~*6dB, high frequency group:**0dB~*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 *0dB.
5. Call transmission index:(5KM)SLR*0, output impedance is **0 Ohm.
6. Super strong function is available for dialing *2 groups of numbers stored in the memory (maximum length of each number is*6 digits)

 //Weatherproof phone//