ICT GADGETS – THE GSM

The GSM (Global System for Mobile Communications) is a second-generation digital mobile telephone standard using a variation of Time Division Multiple Access (TDMA). It is a mobile telephone using wireless technology that allows users to communicate with people who are not within their reach.

It is the most widely used of the three digital wireless telephone technologies – CDMA (Code Division Multiple Access), GSM, and TDMA. 

It operates at either the 900, 1800, or 1,900MHz frequency bands.

TECHNICAL DETAILS

The GSM network can be divided into three broad parts

The subscriber carries the mobile station

The base station subsystem controls the radio link with the

mobile station

The network subsystem performs the switching of calls

between the mobile users and other mobile and fixed

network users

Questions

1. State the full meaning of GSM
2. State how to send messages to GSM 

 ICT GADGET – FAX AND TELEPHONE

FAX

Fax (short for facsimile), sometimes called telecopying or telefax, is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device. The original document is scanned with a fax machine (or a telecopier), which processes the contents (text or images) as a single fixed graphic image, converts it into a bitmap, and then transmits it through the telephone system in the form of audio-frequency tones. The receiving fax machine interprets the tones and reconstructs the image, printing a paper copy.

TELEPHONE

A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user.