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DAILY   DIARY NAME-  PGT SESSION-2016-17        TEACHER   DIARY NAME-  PGT SESSION-2016-17 ATTENDANCE REGISTER CLASS-XII A CLASS TEACHER  PGT SESSION-2016-17

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1G Technology : ·          1G refers to the first generation of wireless telephone technology, mobile telecommunications which was first introduced in 1980s and completed in early 1990s. ·          It’s Speed was upto 2.4kbps, allowed the voice calls in 1 country. ·          It used Analog Signal and AMPS was first launched in USA in 1G mobile systems Drawbacks: ·          Poor Voice Quality ·          Poor Battery Life ·          Large Phone Size ·          No Security ·          Limited Capacity ·          Poor Handoff Reliability 2G Technology: ·          2G technology refers to the 2nd generation which is based on GSM. ·          It was launched in Finland in the year 1991 and used digital signals. ·          It’s data speed was upto 64kbps. Features include: ·          It enables services such as text messages, picture messages and MMS (multi media message). ·          It provides better quality and capacity. Drawbacks: ·          2G require