Twfta Marketplace
Technical specification:

1. Perform condition:
temperature:-10℃~+50℃
relative humidity:45%~95%
atmospheric pressure:86~106Kpa,
environmental noise:≤60dB
2. Main technical index:
work frequency:300HZ~3400HZ
sound level of ringing: 80db
3. Dial number
DTMF dial:
Low frequency:697.770.852.941HZ ;
High frequency:1209.1336.1477HZ
Frequency deflection:≤1.5%;
low frequency electricity plane:-9±3dB;
high frequency electricity plane:-7±3dB
gap of low and high frequency electricity plane in frequency group:2±1dB;



Applications:
As Public telephone for indoor or outdoor, Taxi or bus stands or station, Highway call box
Railway, metro, ATM machines side, Tunnel, Port, Dock, Mines, Generation facilities….
A good ideal telephone for use in wet or corrosive atmospheres



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Contact Information:
Country:
China
Address:
6th/F, 268th factory, Nanchang Ind. part, Gushu Bo'an district, SZ, China
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