The Cellular Connection 1 phần 2 docx

... 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 ... 1 AN INTRODUCTION TO CELLULAR PHONE SYSTEMS The first mobile communications system began in 19 21 when the Detroit Police Department installed two-way radios in i...

Ngày tải lên: 07/08/2014, 21:20

... under rough The Cellular Connection: A Guide to Cellular Telephones, Fourth Edition. Robert A. Steuernagel Copyright  20 00 John Wiley & Sons, Inc. ISBNs: 0-4 71- 316 52- 0 (Paper); 0-4 71- 20 340-8 ... 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

... installation, the The Cellular Connection: A Guide to Cellular Telephones, Fourth Edition. Robert A. Steuernagel Copyright  20 00 John Wiley & Sons, Inc. ISBNs: 0-4 71- 316 52- 0 (Paper); 0-4 71- 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 t...

Ngày tải lên: 07/08/2014, 21:20

... 14 , 18 , 20 22 , 23 24 , 41 45, 52 55, 60, 64—73, 89, 95—96, 10 1 10 2, 10 5 10 6, 11 3 11 5, 12 1, 12 2, 12 6, 12 7. See also Service provider CDMA, 11 4, 11 5, 12 1, 12 2 CDPD, 93, 12 2 Cell, 4—7, 93, 10 2, 11 0 11 1, ... 13 , 16 , 26 , 51, 52 54, 64—65, 78— 81, 93, 95, 97— 10 5, 11 0 11 1, 12 1, 12 3, 12 4, 12 6 SMS, 96, 11 5, 12 7 Southwestern Bell...

Ngày tải lên: 07/08/2014, 21:20

... Steuernagel Copyright  20 00 John Wiley & Sons, Inc. ISBNs: 0-4 71- 316 52- 0 (Paper); 0-4 71- 20 340-8 (Electronic) 23 Table 4 .2 Estimating Cellular Usage 1. I plan to use my phone for: (1) Mostly business; (2) Mostly ... 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...

Ngày tải lên: 07/08/2014, 21:20