ONE.Features：

1.Tone/Pulse, compatible with various communications platforms;

2.Redial；

3.Mute；

4.Message Indication Light;

5.All the electronic parts are environment protection material(ROSH)

6.Desk and wall-mount;

7.Anti lightning/Electro interaction;

8.Waterproof, moistureproof.  

TOW.Function Operation:

1.When a call is coming,please press  HF  button,then can start the talk.

2.When start a call,please press  HF   button first,then dial Tel Number.

3.After phone connection,press   REDIAL  button,then may dial out the last dialed number.

4.If want to pause the call under talk,please press  MUTE  button continously，then the other side can’t hear your voice,release the button,then resume the normal call.

5.Message Light

Please work with PBX,when the light is lighting up,please contact operator for message.

  1) Operating conditions:

   Environmental temperature: -10~ +40℃    

  Atmospheric pressure: 86~ 106Kpa

  Relative humidity:  10%~95%      Environmental noise:  ≤60dB（A）

 Working Frequency: 300~ 3400Hz

  2) Characteristics of dual-tone-dialing

 ● rated low frequency group frequency: 697HZ   770HZ   852HZ   941Hz。

 ● rated high frequency group frequency: 1209HZ  1336HZ  1477HZ 1633Hz。

 ● The tolerance of single frequency within ±1.5% of rated frequency

 ●Voltage level of single frequency of low frequency group in DTMF signal:  -9dBM±3dB。

 ● Voltage level of single frequency of low frequency group in DTMF signal: -7dBM±3dB。

 ● In any frequency combination, the voltage level of high frequency group is higher than that of low frequency group:  2±1dB。

 ●The total voltage level caused by the intermodulation of frequency wave is lower at least 20db than the voltage level of basic wave.

  3) Characteristic of ring:

    The sound level of ringing under normal tintinnabulation: ≥70dB（A）

  4) Sending, receiving loudness rating (SLR & RLR) and Side-tone masking rating (STMR):