The earlier acronym “Groupe Spécial Mobile” gave birth to what we mean by GSM (Global System for Mobile communications) today. People, who have to travel all over the world have hugely benefitted from this type of cellular service.
GSM is a digital technology which uses TDMA technology where a narrow band or channel (30 kHz wide and 6.7 milliseconds long) is split into three time slots. The digital technology converts voice data into digital information and compresses it so that it can take less transmission space to travel. That is why, it is said that TDMA has much more capacity than an analog system (threefold).
The most common form of frequency band is 900MHz, used by most GSM networks across the globe; although there are other frequencies also, some higher than the level of 900 and some below the level. Such as the 850 MHz that is mostly available in rural areas but some cities also have a very good coverage of it.
The latest buzz in the mobile phone industry is 3G or 3rd generation of wireless communication technology that promises to enhance and extend mobility. Lightening-speed internet and intranet access will become a cakewalk with the application of 3G. The 3G enabled phone of tomorrow will have the attributes of a laptop, a TV and of course, a mobile phone.
