... 16KHz or pulse signal 2. Many tariff rates 3. 2,000 phone records 2 line Phone Billing Meter/Billing Meter features1) With large ... function of network center manage, tariff ratedownload and phone bill upload 10) Anti-lightning, anti-jamming design and ... display box for option14) Function of phone bill printing for optionPhone Billing Meter/Billing Meter specifications1) Environment: away from rain, sun ...