STS VENDING SOFTWARE METER 
 
KEYPAD METER PREPAYMENT VENDING SYSTEM
1.1 System Introduction
Keypad Prepayment Vending System meets the STS standard. It follows IEC 62055-41 communication protocol, adopts 20 digit Encrypted number for data carrier to transfer purchase information to meters. It has diverse ways to purchase electricity: Vending station, Mobile vending, Internet online vending, SMS, ATM, etc.
1.2 System Characteristic 
1.Storage management.
2.Customer information management.
3.Power vending.
4.Refund management.
5.System parameters management (Price, tax rate).
6.Vending station credit limit.
7.History arrear management.
8.Data interface for other billing system.
9.Setting for report format.
10.Meter reading management.
11.Token management.
12.Security module management.
13.Security files management.
14.Operator management.
15.Many kinds of language support (Independent language files).
1.3 System Framework

Keypad Prepayment Vending System has two different versions: C/S (Client/Server) framework vending system and B/S (Browser/Server) framework vending system.
1.For C/S framework vending system, it does not need high-level hardware and network service. As to data transfer from Client vending station to database server, it supports via USB flash or E-mail. This solution is the economic way at first stage.
2.For B/S framework vending system, it needs high-level hardware, stable network service and devices for safety. The cost for B/S is higher than C/S at the first stage, but offers advantages to maintenance.Customer can choose different system upon demand.
1.4 System (B/S Framework)Structure 

Servers Applicable:
1.Database Server: used for storage of business data;
2.Web/Time task Server: used for providing HTTP service to connect vending points of utility company, and connection for bank payment collection, internet power vending, vending agency, etc;
3.Vending station: customer purchase energy server point.
4.Offline / online vending station: Mobile vending device.Notice: Above‐mentioned server application can be grouped according to customer demand and development condition; all service function operated in one server is supported as well.