WiMAX is a standards-based wireless technology that provides high-throughput broadband connections over long distances. WiMAX can be used for a number of applications, including “last mile” broadband connections, hotspots and cellular backhaul, and high-speed enterprise connectivity for business
Minggu, 05 Juli 2009
What is WiMAX?
What is Wi-Fi?
Short for wireless fidelity and is meant to be used generically when referring of any type of 802.11 network, whether 802.11b, 802.11a, dual-band, etc. The term is promulgated by the Wi-Fi Alliance.
ny products tested and approved as “Wi-Fi Certified” (a registered trademark) by the Wi-Fi Alliance are certified as interoperable with each other, even if they are from different manufacturers. A user with a “Wi-Fi Certified” product can use any brand of access point with any other brand of client hardware that also is certified. Typically, however, any Wi-Fi product using the same radio frequency (for example, 2.4GHz for 802.11b or 11g, 5GHz for 802.11a) will work with any other, even if not “Wi-Fi Certified.”
Formerly, the term “Wi-Fi” was used only in place of the 2.4GHz 802.11b standard, in the same way that “Ethernet” is used in place of IEEE 802.3. The Alliance expanded the generic use of the term in an attempt to stop confusion about wireless LAN interoperability.
Source: Webopedia
What is Wi-Fi?
Short for wireless fidelity and is meant to be used generically when referring of any type of 802.11 network, whether 802.11b, 802.11a, dual-band, etc. The term is promulgated by the Wi-Fi Alliance.
ny products tested and approved as “Wi-Fi Certified” (a registered trademark) by the Wi-Fi Alliance are certified as interoperable with each other, even if they are from different manufacturers. A user with a “Wi-Fi Certified” product can use any brand of access point with any other brand of client hardware that also is certified. Typically, however, any Wi-Fi product using the same radio frequency (for example, 2.4GHz for 802.11b or 11g, 5GHz for 802.11a) will work with any other, even if not “Wi-Fi Certified.”
Formerly, the term “Wi-Fi” was used only in place of the 2.4GHz 802.11b standard, in the same way that “Ethernet” is used in place of IEEE 802.3. The Alliance expanded the generic use of the term in an attempt to stop confusion about wireless LAN interoperability.
Source: Webopedia
What is VoIP?
Voice over Internet Protocol (also called VoIP, IP Telephony, Internet telephony, and Broadband Phone), is a technology that allows you to make telephone calls using a broadband Internet connection instead of a regular (or analog) phone line. Some services using VoIP may only allow you to call other people using the same service, but others may allow you to call anyone who has a telephone number - including local, long distance, mobile, and international numbers. Also, while some services only work over your computer or a special VoIP phone, other services allow you to use a traditional phone through an adaptor.
VoIP is the routing of voice conversations over the Internet or through any other IP-based network. The voice data flows over a general-purpose packet-switched network, instead of traditional dedicated, circuit-switched telephony transmission lines.
Protocols used to carry voice signals over the IP network are commonly referred to as Voice over IP or VoIP protocols. They may be viewed as commercial realizations of the experimental Network Voice Protocol (1973) invented for the ARPANET.
What is 2G ?
2G (or 2-G) is short for second-generation wireless telephone technology. The main differentiator to previous mobile telephones, retroactively dubbed 1G, is that 1G networks process analog data but 2G networks are digital. This allowed a considerable improvement in voice quality, as digital information is not subject to distortions in the same way as analog information, and also increased capacity as calls can be multiplexed more efficiently. 2G networks may offer an optional service to transfer low-speed data, such as email or software, in addition to the digital voice call itself. SMS messaging is also available as a form of data transmission for some standards.
2G services are frequently referred as Personal Communications Service or PCS in the US.
2G technologies can be divided into TDMA-based and CDMA-based standards depending on the type of multiplexing used. The main 2G standards are: GSM (TDMA-based), IDEN (TDMA-based), IS-136 aka D-AMPS, (TDMA-based, IS-95 aka cdmaOne, (CDMA-based).
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.
Source: Wikipedia
What is 2G ?
2G (or 2-G) is short for second-generation wireless telephone technology. The main differentiator to previous mobile telephones, retroactively dubbed 1G, is that 1G networks process analog data but 2G networks are digital. This allowed a considerable improvement in voice quality, as digital information is not subject to distortions in the same way as analog information, and also increased capacity as calls can be multiplexed more efficiently. 2G networks may offer an optional service to transfer low-speed data, such as email or software, in addition to the digital voice call itself. SMS messaging is also available as a form of data transmission for some standards.
2G services are frequently referred as Personal Communications Service or PCS in the US.
2G technologies can be divided into TDMA-based and CDMA-based standards depending on the type of multiplexing used. The main 2G standards are: GSM (TDMA-based), IDEN (TDMA-based), IS-136 aka D-AMPS, (TDMA-based, IS-95 aka cdmaOne, (CDMA-based).
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.
Source: Wikipedia
What is 2G ?
2G (or 2-G) is short for second-generation wireless telephone technology. The main differentiator to previous mobile telephones, retroactively dubbed 1G, is that 1G networks process analog data but 2G networks are digital. This allowed a considerable improvement in voice quality, as digital information is not subject to distortions in the same way as analog information, and also increased capacity as calls can be multiplexed more efficiently. 2G networks may offer an optional service to transfer low-speed data, such as email or software, in addition to the digital voice call itself. SMS messaging is also available as a form of data transmission for some standards.
2G services are frequently referred as Personal Communications Service or PCS in the US.
2G technologies can be divided into TDMA-based and CDMA-based standards depending on the type of multiplexing used. The main 2G standards are: GSM (TDMA-based), IDEN (TDMA-based), IS-136 aka D-AMPS, (TDMA-based, IS-95 aka cdmaOne, (CDMA-based).
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.
Source: Wikipedia
Langganan:
Postingan (Atom)
