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Payphone Operation To Use
Sep 23, 2017

Payphone Operation to use

First, the telephone operation is used

1, pick / hang up: pick / hang up for the handle control mode, off the hook to turn on, hang up to open;

2, answer the phone: When there is a call, the phone ring, remove the handle, you can call the other side, call back after the handle;

3, call: remove the handle, according to the ordinary telephone dialing mode of operation, and the other call;

4, save the number: remove the handle, press the "storage" button, enter the number to be deposited, press the "storage" button, press "0-9" any key as the storage number address,

5, extract the number: remove the handle, press the "extract" button, press the "0-9", which required a number key to dial out the memory memory number.

Second, the main technical parameters of telephone

1, for the supply voltage of 33-60V of the various program-controlled switches and scheduling switches and scheduling switch system

2, Temperature: -35 ℃ ~ 75 ℃ Relative humidity: 10% ~ 95% Atmospheric pressure: 86 ~ 106 Kpa Environmental noise: ≤ 60dB (A)

3, ringing sound level: ≥ 70dB can be increased to 75-80 dB according to the specific circumstances of customers, customers need to customize

4, when the user line is 3KM is the signal level Standard frequency: low frequency group: 697-941Hz high frequency group: 1209-1477Hz

Frequency offset: not more than ± 1.5% combination of high and low frequency level difference: 2 ± 1dB

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

5, call transmission indicators: SLR ≤ 12, RLR ≤-1, STMR ≥ 10, the output impedance: 600Ω

6, with a super 12 group number memory memory dialing function (each group of up to 16 long)

7, 0.8mm cable in the cable, the user line up to 7KM long

8: can be customized according to customer requirements, the minimum use of voltage as long as 24V phone. GB is 48V-60. This can save a lot of lines in tunnels and subways.

Third, telephone lightning protection standards

Telephone board device international telecommunications Union highest standard ITU-T K. 219 (the world's highest lightning protection standards) quasi-detonator, lightning protection standards in line with GB / T 9043-1999