How do cell phones work?

Question

I know it's radio waves. But how do towers talk to land lines which talk to international towers and land lines??

Answer 1

When somebody is calling you, the network send the message to all Base Station, and your phone answer "I am here". The network assign a channel between your phone and the Switch, and complete the channel with the calling phone.

When you start moving, the phone measures the power and check which Base Station is near to change. The network orders the Handover from one Base station to the other.

The Cell Phone "talks to" Base Transceiver Station (BTS); the BTS is linked to Base Station Controller (BSC) and the BSC is linked to MSC or Switch. Switches are interconnected to other National, Cellular and International Switches.

(A Switch is a Phone switching central).

THe interconnection between BTS-BSC, BSC-MSC and MSC-MSC is by Fibre Optics, Microwaves, Satellites, twisted cupper pairs...

Hope it helps.

Answer 2

I think the towers are just on the regular phone network, and therefore are connected by land lines, or microwave links into the regular pone network. To make transoceanic calls, the network uses transoceanic cables, or telecommunications satellites.



What makes cell phones unique is that each tower only covers a small area, and as you move along from area to area (called cells), the towers pass the customer and his call off to the next tower.

Answer 3

cell phone works based on CDMA collision detection multiple access if u want to know abt the cell phone working u have to study abt cellular telephony which is a one sem course in engineering u can't learn in few lines

Answer 4

They call people

Answer 5

satelites they put in the sky