KTH22 mining telephone is used for coal mine that contains explosive gases(methane and coal dust) and other bad environment.
Product features
1. Dialing mode: Impulse and double audio frequency
2. Struction form: Wall-hung and desktop
3. The telephone case uses anti-static materials and flame-retardant plastics; Safe and reliable.
4. The telephone adopts electromagnetic transmitter instead of carbon transmitter; Long life, stable performance, low noise, good linearity
Shell protection grade: IP54
| Item | Unit | Data |
| Rated voltage feed | V | DC24/48 |
| Rated current feed | MA | ≤20 |
| Ringing voltage(2000,HZ) | V | ≤65 |
| Rining current | mA | ≤20 |
| Rining Upgrade | dB | ≥ |
| Material | ABS |
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