SEC1002A power double-line polar reverse phone bill meter which is mainly used in public phone billing can realize the immediate billing once dial the number and display the duration and charge and other items at the same time. SEC100-2A make the centralized management and intelligent mangement on the public phone completely available for the telecom suppliers. Functions: 1) Support 2 billing type: polarity reverse billing and constraint billing; 2) Though the telecommunication between the management system and phone bill meter to amend the all the parameters including the charge rate and transmit the call record to the system to support the centralize mangement of the netwok management centre. High statistic function on call records which not only can be before delivery but also can be in the later stage. 3)燛nable to bill preferentially during the preferential preiod regulated by telecom department. It will not bill if dial the public welfare calls. 4) High-clarity backlight LCD display screen and digit single tube double panel display, the user can see the bill information easily, and can display 12 digits at the same time. 5) Accumulate and check the charge of that very day or total charge 6) Support two-way call, two-way telecommunication with the network management system, and the charge rate with the nework and clock, and sent the call accumulated data to the network management system 7) High reliablity design, lightning-proof, anti-static electricity, highvoltage proof 8)燩rinting device selection, and print the call record immedately.