The Cellular Connection 2 phần 2 pdf

... and the voice from the other end of the connection usually came through a loudspeaker. You couldn’t dial a call; instead the mobile operator at the other end of your radio link established the connection ... you approach the limit of the range of one cell, you will enter another before the quality of service deteriorates. Furthermore, the limited range of cellular tr...

Ngày tải lên: 07/08/2014, 21:20

... 14, 18, 20 22 , 23 24 , 41—45, 52 55, 60, 64—73, 89, 95—96, 101—1 02, 105—106, 113—115, 121 , 122 , 126 , 127 . See also Service provider CDMA, 114, 115, 121 , 122 CDPD, 93, 122 Cell, 4—7, 93, 1 02, 110—111, ... Singapore / Toronto THE CELLULAR CONNECTION HLR, 66 HORN, 52, 125 I IMTS, 3, 4, 121 Installation, 4, 10, 22 , 25 27 , 31, 45, 47, 58, 75, 76, 79, 82, 89, 108, 123 , 1...

Ngày tải lên: 07/08/2014, 21:20

... 938-7 626 B 313 320 -7 626 Houston A 713 825 -7 626 B 713 824 -7 626 Indianapolis A 317 443-7 626 B 317 4 32- 7 626 Kansas City A 816 591-7 626 B 816 22 3-7 626 Las Vegas A 7 02 595-7 626 B 7 02 379-7 626 Los ... 3 72- 7 626 Baltimore A 410 20 8-7 626 B 410 3 82- 7 626 Boston A 617 633-7 626 B 617 28 5-7 626 Chicago A 3 12 659-7 626 B 3 12 550-7 626 Dallas A 21 4 850-...

Ngày tải lên: 07/08/2014, 21:20

... change the pattern the radio waves propagate from the antenna. Both the cell-site radio and the cellular phone are capable of dynamically adjusting their power level. It can be raised to improve the ... the MSC, or Mobile Switching Center, which links cellphones to established conventional telephone services. The relationship among these is illustrated in Figure 2. 1. THE...

Ngày tải lên: 07/08/2014, 21:20

... Ericsson, NorTel, and Nokia, among others. Cellular HOW LICENSES WERE GRANTED 21 3 THE BUSINESS OF CELLULAR PHONES The business of cellular phones is a big one. Although cellular phone companies must ... systems. The Cellular Connection: A Guide to Cellular Telephones, Fourth Edition. Robert A. Steuernagel Copyright  20 00 John Wiley & Sons, Inc. ISBNs: 0-471-316 52...

Ngày tải lên: 07/08/2014, 21:20

... sales commissions paid to them by the carrier for cellular subscriptions to ‘‘buy down’’ the retail price of the cellular phone, so that the price of The Cellular Connection: A Guide to Cellular Telephones, ... can multiply their weekday calls by the average call length by 20 weekdays a month, then multiply the percentage of off-peak by the result and add it, for exa...

Ngày tải lên: 07/08/2014, 21:20

... you pay the long-distance rate between the MSC and the point you are calling. [2] When someone calls you, they pay the rate between their phone and the MSC and you pay the portion of the call ... peak Basic 29 .95 0 0.40 0 .25 48.45 45.45 103.95 91.95 Personal 19.95 30 0.75 0 .25 32. 95 28 .95 130.45 96.45 Business 49.95 100 0.35 0 .25 49.95 49.95 82. 95 78.95 Volume 79.95 20...

Ngày tải lên: 07/08/2014, 21:20

... the call, even though the party on the other end has hung up — whether you placed the call or just answered it — you’re still connected to the cell site and paying for that connect time for the ... dial a number the night before if you feel like it.) These digits will stay in the phone’s working memory until you clear them out or until they are replaced by another number. If...

Ngày tải lên: 07/08/2014, 21:20

... installation, the The Cellular Connection: A Guide to Cellular Telephones, Fourth Edition. Robert A. Steuernagel Copyright  20 00 John Wiley & Sons, Inc. ISBNs: 0-471-316 52- 0 (Paper); 0-471 -20 340-8 ... places the transceiver close to the antenna, which is usually mounted toward the rear of a vehicle. This proximity allows the length of the cable that connects the...

Ngày tải lên: 07/08/2014, 21:20

... to hang up when they no longer hear the signal from the modem at the other end of the line. When one modem hangs up, so does the other. With dropouts and handoffs being a fact of cellular life, ... existing modem, to use it on a cellular system at the very least a device is needed between the modem and the cellular phone. This device makes the cellular phone appear t...

Ngày tải lên: 07/08/2014, 21:20