Phone billing meter

Phone billing meter Item no.:4 lines phone billing meter Basic Features Four phone lines centralized management: Display call sum, duration and other related information.Bill for all outgoing calls separately and automatically.Mode of billing startup: polar-reverse.Large LCD screen displays status of the corresponding port: on/off hook, discount price, bill and lock/unlock.Bill check function: call number, stat/end time, duration, sum of the recent outgoing calls.Subtotal function: calculate for several calls of one user (must be the same line).Bill statistic: daily total of the last 62 days and total calculation, can calculate according to date and line number.Switch automatically between full price and discount price.With various tariff rates: international call, internal call, local call, special call, free call and forbidden call.Modes of settle: each call settle and multi call settles. Each call settle means the phone will lock and the sum indicates after each call, the next call cannot be begun before unlock. Multi call settle means won't lock until many calls are finished.Built-in Modem: support remote update rate or upload phone bills. Rechargeable batteries (optional): Can work when power cut off. If battery is low, the meter will give alarm. Condition: Environment: Be away from rain, sun, high temperature, dust, alkali, acid, strong vibration situation or strong electromagnetic wave. Atmospheric pressure: 86KPa 106KPa Relative Humidity: 10% 95% Noises: <60dB Temperature: -10°C 40°C Technology Standard: Timing accuracy: <1 sec DTMF receiving standard: ≥-23dBm Incoming receiving accuracy: ≥99.99% Insertion loss: ≤0.5dB(800Hz) Interface murmurs level: ≤-67dBm