The consumer enters the pump number, the maximum sales amount, debit or credit card, and (if a debit card) the secret personal identification number (PIN).
The gas station microcomputer system checks its data base for negative file (“hot card”) and for independent oil dealer’s authorization information.
Authorization messages are sent to a local area transaction switch which can route the transaction to the independent dealer/company host in the case of credit authorization to a credit authorization network and in the case of a debit transaction to a bank debit card network.
On the average, transactions are authrorized in five seconds. They are returned to the gas station microcomputer system which activates the gas pump.
When the consumer turns off the gas pump, the microcomputer system completes the transaction and prints receipts at the card authorization terminal.
The gas station microcomputer system sends charge/debit data from the last transaction with the current authorization transaction to the local area transaction switch and on to the dealer/company host for purposes of data capture, balancing, clearance, inventory control, etc.
An alternate to complete automation is the single operator maintained convenience store.
Gas pumps are electronically controlled.
Retail Gasoline Service Stations
Credit/debit card authorization systems for retail gasoline service stations are illustrated in Exhibit 111-12.
Retail gas stations and closely allied convenience stores are a rapidly emerging market for offering credit card authorization services. Although bank debit card transaction experiments are underway, primary action is with oil and bank credit card transactions.
Completely automated card transaction systems for gas stations include:
Card authorization terminals.
Electronically metered gas pumps.
A station microcomputer system with a data base.
A local area switch.
Credit card authorization proceeds as follows:
The consumer activates a selected gas pump.
The consumer enters credit card information through the card strip reader at the authorization terminal.
Most contain a credit card strip reader to read magnetically enclosed card information.
Many have a built-in telephone or have the capability of being connected to a telephone, thereby gaining access to a voice line.
Newer models contain microprocessors and sufficient data storage for handling data capture and polled data transmission and settlement.
The terminals contain various levels of intelligence to create the multiple protocol and message formats to properly transmit and receive information over multiple vendor data/interchange networks.
Access to voice authorization networks is provided for over “floor limit” and other exception authorization transactions.
Data entry and function keys and minimum visual display are provided to create electronic data transmission and receive automated authorization.
• Retail authorization terminals can be connected to multiple credit card authorization data networks. The network entered is that of the primary service provider (financial institution, credit card association, commercial processing vendor, and more recently VAN vendor(s)). Accounts not held by the primary vendor are routed through credit card interchange networks to other card authorization centers or to financial institutions.
• Large, and increasingly, medium size retailers are installing electronic cash registers with comprehensive voice and electronic interfaces to credit card authorization networks. Newer units have full voice and data communications capabilities integrated with ECR resulting in a comprehensive POS system.
ECRs enter credit card authorization networks via a local (in store/area) switch. The authorization can be routed either directly to credit card authorization networks or via the retail host network (national/regional retailers) to credit card authorization data networks or credit card interchange networks.