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1、Unit 8,Telephone Cards,Important vocabulary,prepaid phone card 预付费电话卡 PIN (personal identification number) 身份号码 land-line 陆线，陆上线路 magnetic stripe 磁条,ATM ( Automatic Teller Machine) 自动柜员机 pay-phone 公用电话 key card 房卡， 电子开门卡 optical storage 光存储， 光存储器,Important vocabulary,microchip 微晶片 core technology 核心
2、技术 stored-value 储值,Important vocabulary,Telephone cards,A telephone card, calling card or phone card for short, is a small card, usually resemblinga credit card, used to pay for telephone services. Telephone cards can employ prepaid credit system or credit card style system of credit.,Questions on P
3、aragraph 1-3,1.What is the most common types of telephone cards ? 2. What is the other main type of card ? How does the card charged calls? 3. What are the two core technologies for phonecards are?,Types of telephone card,Prepaid cards: purchased with a specific balance, from which the cost of calls
4、 made is deducted. Pre-paid phone cards are disposable. Pin cars: a card with a special PIN（personal identification number） printed on it that allows one to charge calls to a land-line telephone account.,Core technologies for cards,Stored-value: the card itself contains the balance available. The ba
5、lance is read by the public pay-phone machine when it is inserted into the machines card reader. It is similar to an ATM at a bank. Ways in which the value can be encoded on the card. 1. The earliest system used a magnetic stripe as information carrier.,Stored-value cards,2.The next technology used
6、optical storage. Optical phone cards get their name from visible marks left on the card, such as holes or lines, so that the card reader scansfor such marks and determines the balance on the card. 3. Chip cards The initial microchipswere easy to hack, typically by scratching off the programming-volt
7、age contact on the card Highly secure technology aided the spread of chip phone cards worldwide.,Remote memory cards,Remote memory: Uses a toll or toll-free access number to reach the database and check for balance on product. Remote memory phonecards can be used from any tone-mode phone and do not
8、require special card readers. Since remote memory cards are more accessible and have lower costs, remote memory phone cards have proliferated,Remote memory cards,Purchasing in most countries in retail stores retail chains commonly corner stores Specific features : rechargeability: pinless dial speed
9、 dial and more,Calling accounts: Accounts not requiring a card eliminating the need for printing of a physical card reducing the costs increasing convenience,Phone cards collections,place advertising on cards,increase the appeal of the cards to consumers,disposability of the cards,Combined with,collecting phone cards as a hobby,
