BY-

Bhomik Pandey Pranoy Prasad Kanika Singhal

1G (or 1-G) is short for first-generation wireless telephone technology, cellphones.

Uses digital signaling to connect the radio towers to the rest of the telephone system .

Uses analog signaling to communicate between the speakers.

The voice is modulated to higher frequency, typically 150MHz and up.

2G (or 2-G) is short for second-generation wireless telephone technology. Commercially launched on the GSM standard. Three primary benefits of 2G networks : 1) Phone conversations were digitally encrypted. 2) More efficient on the spectrum allowing for far greater mobile phone penetration levels. 3) Introduced data services for mobile, starting with SMS text messages.

The lower powered radio signals require less battery power.

Digital error checking increased sound quality by increasing

dynamic range and lowering the noise floor. The lower power emissions helped address health

concerns. Introduction of digital data services, such as SMS and

email. Greatly reduced fraud. Enhanced privacy. Digital cellular calls are much harder to eavesdrop on by use of radio scanners.

In less populous areas, the weaker digital signal may not

be sufficient to reach a cell tower. Digital signal has a jagged steppy one and has occasional

dropouts. While digital calls tend to be free of static and background

noise, the lossy compression used by the codecs takes a toll; the range of sound that they convey is reduced.

A fully IP-based integrated system. Will be capable of providing between

100 Mbit/s and 1 Gbit/s speeds both indoors and outdoors.

Premium quality and high security.