2.5G is a stepping stone between 2G and 3G cellular wireless technologies. The term "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.
While the terms "2G" and "3G" are officially defined, "2.5G" is not. It was invented for marketing purposes only.
2.5G provides some of the benefits of 3G (e.g. it is packet-switched) and can use some of the existing 2G infrastructure in GSM and CDMA networks. GPRS is a 2.5G technology used by GSM operators. Some protocols, such as EDGE for GSM and CDMA2000 1x-RTT for CDMA, can qualify as "3G" services (because they have a data rate of above 144 kbit/s), but are considered by most to be 2.5G services (or 2.75G which sounds even more sophisticated) because they are several times slower than "true" 3G services.
Venture Communications deploys BTI Systems' packet optical transport for next generation service delivery.(CONTRACTS)
Nov 01, 2010; BTI Systems, a provider of metro service delivery, announced that Venture Communications Cooperative of Highmore, South Dakota,...
Challenges of 2.5G to 10G migration in optical networks: challenges of moving from 2.5G to 10G networks include cost of new equipment, technical issues, and the need to operate with existing infrastructure. (Fiber Optic Technology).
May 01, 2002; Over the years, the exponential growth of the Internet has been fuelled primarily by Internet Protocol (IP) traffic, creating an...