Four-line Phone billing meter system (TPJ 500)

Main Feature: *Large LCD display with bright backlight *Multiple tariff rates could be set, such as rate for international calls, national calls, local calls, specialism, free and forbidden calls *signal for billing startup: reversal polarity,12/16Khz *can work with PSTN,GSM,VOIP *can trace the last 2000 records of telephone number, duration, total sum *Accumulate daily total sum and the grand totat amount for last 32-days automatically *With build-in modem,support center network management, like tariff rates download and phone bills upload *Build-in rechargeable batteries, it can work at least 8 hours after power cut down *Remote 3-line character LCD display box for optional *Function of printing phone bill for optional *can block and unblockphone billing meter by time, call amount(optional) Specification: Atmospheric pressure:86Kpa-106Kpa Relative humidity:10%-90% Noise:<60dB Temperatre:-10 degree 40 degree Timing accuracy:<1 sec DTMF receiving standard: >-23dBm Incoming receiving accuracy:>99.99% Insertion loss:<0.5dB Dialing method:DTMF Access:PSTN Power: AC220V,50/60Hz,DC 9V,800mAH Package: 3.12kg/pcs Mea.320x220x225mm 8pcs/carton Mea.650x450x460mm Application: telephone booth working connnect diagram Remote display box