Outdoor help emergency phone

Product features

1. shell: sheet metal shell, surface spraying imported reflective paint, with reflective function, easy to find.

2. buzzer, circuit board, shell all accessories using multi-layer waterproof, dustproof structure, the whole machine protection level to reach the national standard GB4208-93 IP66

3. waterproof glue: imported waterproof glue, high viscosity, high temperature and pressure resistance, waterproof life of more than 10 years.

4. wire: Teflon wire, acid and alkali resistance, high and low temperature resistance, anti-aging, no fire.

5. phone stability, anti-interference ability, in line with national standards GB / T 15279-94. 

6. phone color can be selected, yellow is the standard color.

7. phone line power supply. 

8. hands-free one-touch call. 

Detailed parameters

1. Applicable to various program-controlled switches and dispatching switches and dispatching switch systems with feeder voltage of 33-60V

2. Temperature: -40℃~75℃

3. Relative humidity: 10%~95%

4. Atmospheric pressure: 86~106 Kpa

5. Ambient noise: ≤60dB(A)

6. Ringing level: ≥80dB

7. Signal level when the user line is 3KM

Standard frequency:

Low frequency group: 697-941Hz

High frequency group: 1209-1477Hz

Frequency shift: not more than ±1.5%

High and low frequency level difference of the combined signal: 2±1dB

The total distortion caused by harmonic intermodulation is at least 20dB lower than the basic level

◆Talk transmission index: SLR≤12, RLR≤-1, STMR≥10, output impedance: 600Ω

◆In the 0.8mm cable core, the user line can be up to 7KM long.

◆Wiring method: telephone line twisted pair.