Detailed Product Description

Features: 1) Makes DDD, IDD and local calls and charges fee with valid cards, such as IC cards and magnetic cards2) Makes free calls without cards3) Not permitted to dial the forbidden phone numbers preset via management system4) Two billing methods: polar reverse signal and 16kHz or 12kHz metering pulses5) Dynamic displays the balance of the card and call duration6) Support advertisement playing7) Over-voltage and over-current protection8) Working under the supervisor of management system9) Downloads tariff rate table and parameters to the phones via management system