tailieunhanh - The Cellular Connection 1 phần 7

Quảng cáo cho dịch vụ di động cũng được tìm thấy trên đài phát thanh và truyền hình, và ngày càng quốc gia cũng như các quảng cáo địa phương, bởi vì hợp nhất của các hãng hàng và sự tham gia của các công ty quốc gia như AT & T. Chọn quyền | The Cellular Connection A Guide to Cellular Telephones Fourth Edition. Robert A. Steuernagel Copyright 2000 John Wiley Sons Inc. ISBNs 0-471-31652-0 Paper 0-471-20340-8 Electronic 6 HELLO MA IT S ME Using a cellular telephone is not much different from using a conventional one. In fact it can even be easier because these phones contain their own small computers and have many more special features than regular phones. And the high quality of their audio makes them a pleasure to use. At first glance the keypad of a cellular phone may appear intimidating. Once you know what everything s for though and how it works there s nothing to it. BUTTONS BUTTONS In addition to the usual twelve buttons found on a home or office Touch-Tone phone the handset of a cellular phone contains several buttons that are intended specifically for cellular operation. Because convenience and safety are two prime factors in the design of a cellular phone as many of its controls as possible sometimes all of them are grouped together on the handset of the vehicle-installed phone as well as on the portable. The actual keys key sequences and indicators on any particular phone may be very different from those described here because each manufacturer tries to make the phone s features more extensive and simpler to use at the same time. Your telephone s instruction manual 47 48 HELLO MA IT S ME and your service provider s user guide are your primary sources for information on the features available from the keypad and how to access them. This section provides general information on the use and representative functions of many of these keys for the prospective user. Figure illustrates a typical portable telephone handset. The PWR power button 8 turns the phone on and off. Often this button must be depressed for a fraction of a second longer than you expect for it to work this is done to prevent accidental or inadvertent power off power on. Remember that the phone must be turned on in order to .