TECHNOLOGY.... TODAY ,TOMMORROW.....

  I think the word EDGE Technology is familiar to you. Atleast to those guys who use GPRS or Internet in their mobile phones. Therefore a question to them; Do you know what this really is ???? Have you ever thought how does this work????
  EDGE is the acronym for Enhanced Data Rate for GSM Evolution/Environment which is generally an extended version of GSM. This technology is also nick named as 2.75G as this is the transmission path between 2G and 3G. EDGE is also termed as IMT-SC or Single Carrier. EDGE technology is invented and introduced by Cingular, which is now known as AT&T..EDGE   is considered as pre-3G technology and is apart of ITU's 3G definition.
  EDGE technology is a backward compatible technology, in the sense that older versions of mobiles can be equipped with EDGE technology. EDGE technology not only helps you to connect to Internet but also it enhances all multimedia services.Edge is all-like GSM because both have the same symbol rate as it does not require any additional hardware or software parts. But still there is a minor differences between these two technologies in the sense that EDGE is three times faster data transmission rate than ordinary GPRS. This is because EDGE uses 8PSK (8Phase Shift Keying) in addition to Gaussian Minimum Shift Keying (GMSK). EDGE produces a 3-bit word for every change in carrier phase. This is the reason why EDGE supports three times faster data rate. The EDGE supports a bandwidth of 236.8 Kbps for 4 time slots (theoretical bandwidth is 473.6 Kbps for 8 time slots) in packet switching mode.