Practical machine

dnt> GSM industry module, Chinese and English menu operation contact surface; supports the STK card comprehensively, receives and dispatches the short information function; exempts reminds the number, to dial again, to dodge breaks, in the telephone conversation the volume control function, three side telephone conversations (need network support); tariff backup self-varifying function, guarantee cost accuracy; locks machine, locks the card, machine the card interlock, the lock position, the lock net, the telephone password protection function; endures dials, the direct dialing, to forbid to inhale, the local handset number section judgment and the nimble number adjustment function; the automatic Canada dials the local district number, dials the local number not to need Canada to dial the district number, long-distance automatic Canada dials the IP turning on number (to be possible to establish different IP turning on number) the power failure protection, the system clock retains the function; the built-in clock, has the clock and date demonstration function the low power loss system design, the equipment has large capacity may charge the reserve battery, in power failure situation above standby time 36 hours, telephone conversation time 2 hours; (when long and local network condition related) outside sets at the small high performance switching power supply, antijamming ability ultra; the low voltage against vibration preservation technology, lengthens telephone's service life supports the special-purpose SIM card to have custom-made the production method, but prevents the SIM card to divert effectively.