2G technology

 2G Technology 

2G technology is second communication technology generation that already use digital technology. This generation use Time Division Multiple access (TDMA) and Code Division Multiple Access (CD MA) in its communication technology. 2G technology used for voice communication, SMS (Short Message Service), voice mail, call waiting and data transfer with maximum 9600 bps speed.

Advantages from 2G than 1G are better services, bigger capacity, digital based, and use more efficient power so  handset can use longer time and battery size can be smaller. Disadvantages from 2G are low transfer rate, not efficient for low traffic, limited network range, and very depend on BTS (cell tower).

The improvement of 2G is 2.5G, TDMA in this technology implemented in GPRS (General Packet Radio Services) and WiDEN (Wideband Integrated dispatch). CDMA implemented in CDMA2000-1x Release 0/RTT (1 times Radio Transmission Technology) or IS-2000 (ITU based), or CDMA2000 (3GPP2 based). 2.5 G provider provide some advantages 3G (like packed-switched) and can use part of 2G infrastructure in GSM and CDMA network.

Source : http://tomorrow4life.wordpress.com/2013/02/07/sejarah-dan-perkembangan-jaringan-seluler-2g-3g-4g/ (2G) and http://tips-watan.blogspot.com/2012/11/teknologi-0g-1g-2g-25g-3g-35g-dan-4g.html (2.5G)