Since the development of NMT 450 in 1981, many standards for mobile communication have been developed throughout the world. Each mobile standard has been developed to meet the particular requirements of the country or interest groups involved in its specification. For this reason, although a standard may be suitable for one country, it may not be suitable for another. The main cellular standards and the main markets in which they are used are summarized in the following table.
0 comments:
Post a Comment