The explosion-proof telephone is an explosion-proof and intrinsically safe pulse/double audio compatible dial explosion-proof telephone, which is the terminal equipment of explosion-proof communication system and has the basic functions of ordinary telephone. The EXPLOSION-PROOF TELEPHONE CAN BE DIRECTLY CONNECTED TO THE 24~60 VOLT MUNICIPAL telephone NETWORK AUTOMATIC telephone exchange and the user's small exchange (or dispatch machine). When THE EXPLOSION-PROOF TELEPHONE IS IN THE RINGING STATE, THE buzzER IN THE MACHINE WILL RING, AND THE red INDICATOR light ON THE panel will shine, which OVERcomes the shortage of not hearing the ringing sound when the environment noise is large. The explosion-proof telephone has beautiful appearance, generous, clear sound and easy maintenance. The explosion-proof shell of the explosion-proof telephone is cast by aluminum alloy, and the surface is sprayed with electrostatic plastic, which has good impact strength and protective performance. Explosion-proof telephone keypad adopts stainless steel keypad, handle adopts outdoor public telephone handle, handle rope adopts outdoor public telephone metal sheath electric cable, circuit components are purchased and produced according to outdoor standards, circuit through strict explosion-proof treatment and protection treatment. The explosion-proof telephone can be used indoors and outdoors in relatively harsh environment. The explosiON-PROOF TELEPHONE CAN USE ANTI-NOISE HANDLE (also known as explosiON-proof ANTI-noise telephone) to make the phone talk more clearly in high noise environment. 1. Ambient temperature: -30 ~ +50℃ 2. Relative humidity: ≤95% 3. Atmospheric pressure: 80 ~ 110 kPa 4. Ambient noise: ≤60dB 5. Explosion-proof mark: Exdib ⅱ BT6 6. Protection grade: IP54 7. Operating frequency: 300 ~ 3400 Hz 8. Ringing sound level: ≥70 dB 9. Size: 220×250×95 (mm) 10. Installation size: 150×150 (mm) 11. Weight: 4 kg