 Model Number |
TT-33 |
Function instruction:
��double frequency dial way
��can use 200, 201, 300, IP card to speak on the phone
��can dial for local city, local country and international. telephone.
��CD screen display Chinese character, telephone number, current time and speak time. Elegant and can choose back light for night use.
��Class three thunder proof design, the whole telephone have strong explosive proof, corrosive proof and waterproof function.
��high anti jamming, suitable in various environment.
tech parameter:
GB/T15279-2002"auto telephone technology condition"
1. use environment:
temperature:-10���+40��br />relative humidity:10%ç¯Â�5%
atmospheric pressure:86ç¯Â�06KPa
noise demand:≤60dB(A)
2. ring grade:≥70dB(A)
3. transfer feature:
a. frequency respond feature: telephone transfer and receive frequency should be in the scope of 300-3400Hz.
b. distortion: transfer sign:
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Send noise
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Receive noise
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Side noise conceal
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0Km
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≤15dB
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≤+2dB
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≥+12dB
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5Km
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≥+5dB
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≥-7dB
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≥+6dB
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