EX-9632R-H/EX-9633R-H
Manual
EX-9632R-H/EX-9633R-H • Manual Version 1.1 • 30.06.2012
www.topsccc.com
Brief of Mobile Network
2G
2G (or 2-G) stands for second-generation wireless telephone technology. Second
generation 2G cellular telecom networks were commercially launched on the GSM standard in
Finland by Radiolinja (now part of Elisa Oyj) in 1991. Three primary benefits of 2G networks
over their predecessors were that phone conversations were digitally encrypted; 2G systems
were significantly more efficient on the spectrum allowing for far greater mobile phone
penetration levels; and 2G introduced data services for mobile, starting with SMS text
messages.
2.5G
2.5G ("second and a half generation") is used to describe 2G-systems that have
implemented a packet-switched domain in addition to the circuit-switched domain. It does not
necessarily provide faster services because bundling of timeslots is used for circuit-switched
data services (HSCSD) as well.
The first major step in the evolution of GSM networks to 3G occurred with the
introduction of General Packet Radio Service (GPRS). CDMA2000 networks similarly evolved
through the introduction of 1xRTT. The combination of these capabilities came to be known as
2.5G.
3G
3G or 3rd generation mobile telecommunication is a generation of standards for mobile
phones and mobile telecommunication services fulfilling the International Mobile
Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication
Union. Application services include wide-area wireless voice telephone, mobile Internet access,
video calls and mobile TV, all in a mobile environment. To meet the IMT-2000 standards, a
system is required to provide peak data rates of at least 200 Kbit/s. In recent 3G releases, often
