| 摘要 |
A self-service vending unit allows a potential user of a toll transponder to buy the transponder without having to visit a customer-service facility. The vending unit automatically accepts payment, such as cash or a credit or debit card, and issues the transponder with a paid value. The vending unit communicates with a customer-service computer through a TCP/IP connection and allows the user to top off the value on the transponder and otherwise to manage the account.
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