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Evolution-Data Optimized
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<p>Evolution-Data Optimized (EV-DO, EVDO, etc.) is a <a href="/facts/Telecommunication/vxoj1cxR">telecommunications</a> standard for the <a href="/facts/Wireless/GfDoFwfo">wireless</a> transmission of data through <a href="/facts/Radio/XFr909M2">radio</a> signals, typically for <a href="/facts/Broadband_Internet_access/EMbwSrnK">broadband Internet access</a>. EV-DO is an evolution of the <a href="/facts/CDMA2000/yF4B3rfl">CDMA2000</a> (<a href="/facts/IS-2000/yF4B3rfl">IS-2000</a>) standard which supports high data rates and can be deployed alongside a wireless carrier's voice services. It uses advanced <a href="/facts/Multiplexing/YE7hK8cw">multiplexing</a> techniques including <a href="/facts/Code-division_multiple_access/o2RLKE4M">code-division multiple access</a> (CDMA) as well as <a href="/facts/Time-division_multiplexing/tv7bMh1v">time-division multiplexing</a> (TDM) to maximize throughput. It is a part of the <a href="/facts/CDMA2000/yF4B3rfl">CDMA2000</a> family of standards and has been adopted by many <a href="/facts/Mobile_phone/H3EcqD9h">mobile phone</a> service providers around the world particularly those previously employing <a href="/facts/CDMA/o2RLKE4M">CDMA</a> networks. It is also used on the <a href="/facts/Globalstar/4Tq51wvu">Globalstar</a> <a href="/facts/Satellite_phone/gqUV4bat">satellite phone</a> network. </p><p>An EV-DO channel has a bandwidth of 1.25 MHz, the same bandwidth size that IS-95A (<a href="/facts/IS-95/GM6XVmLR">IS-95</a>) and IS-2000 (<a href="/facts/CDMA2000/yF4B3rfl">1xRTT</a>) use, though the channel structure is very different. The back-end network is entirely <a href="/facts/Packet_switching/olDlDP1R">packet-based</a>, and is not constrained by restrictions typically present on a <a href="/facts/Circuit_switched/fJ3vdmAB">circuit switched</a> network. </p><p>The EV-DO feature of CDMA2000 networks provides access to mobile devices with <a href="/facts/Forward_link/wCxVKCKo">forward link</a> air interface speeds of up to 2.4 Mbit/s with Rel. 0 and up to 3.1 Mbit/s with Rev. A. The <a href="/facts/Reverse_link/wCxVKCKo">reverse link</a> rate for Rel. 0 can operate up to 153 kbit/s, while Rev. A can operate at up to 1.8 Mbit/s. It was designed to be operated end-to-end as an <a href="/facts/IP-based_network/KNkxtSpw">IP-based network</a>, and can support any application which can operate on such a network and bit rate constraints. </p>