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  Channel Range

Introduction to Channel Range

In analog cell-phone systems a single cell uses one-seventh of the existed duplex voice channels. That is every cell is using one seventh of the existed channels so it has an exclusive set of frequencies and there are no crash.

I. A cell phone carrier generally takes 832 radio frequencies to use in a city

II. Every cell phone employs two frequencies per call - a duplex channel- so there are generally 395 voice channels for each carrier.

So, each cell has about 56 voice channels existing. Other words, within any cell, 56 persons can be talking on their cell phone at one time. Analog cellular systems are referred first generation mobile technology or also termed as 1G. With digital transmission methods or 2G, the figure of offered channels increases. For instance, a TDMA-based digital system (more on TDMA later) can take three times as many calls as an analog system; therefore each cell has approximately 168 channels available.

Cell phones or mobile phone contain low-power transmitters in them. Several cell phones contain two signal strengths: 0.6 watts and 3 watts. The base station is as well transmitting at low power. Low power transmitters include two benefits;

1. The base station and the phones' transmissions within the cell of it do not make it very far outside that cell. Both of the cells can again use the similar 56 frequencies. The similar frequencies can be reused widely across the city.

2. The cell phone's power consumption that is generally operated by battery is comparatively low.

The meaning of Low power is small batteries, and this is what has made handheld cellular phones feasible.

The approach of cellular needs a large number of base stations in a city of any size. A distinctive large city can comprise hundreds of towers. But because several persons are using cell phones, costs stay low power user. Each carrier in each city as well runs one central office called the MTSO (mobile telephone switching office). This office manages the entire phone connections to the general land- based phone systems and manages all of the base stations in the region.

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