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Using GSM high quality dual band module to support 900mhz/1800mhz dual band service.Solid and safely measures for outdoor and indoor installation by the aid of components including external antenna, LCD PC (polycarbonate), alloy aluminum housing and alloy zinc keypad to guard against burglar.Using 128*64 dots large graphic LCD screen is user friendly and showed diverse foreign languages, company name, talking time, dialed numbers, incoming call number.Four special button to adjust volume, send number, follow on call and take card out.Automatic re-send of pin number for GSM SIM card authentication on power reset.With flash memory system can be easily upgraded.Having circuit error detection feature to display error code and suspend service.Having ic card with sam card authentication.Providing for effective remote management via tcic payphone management system
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