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.

Main features : //Weatherproof telephone//

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)