Comcast High-Speed 2Go User Manual page 63

Glossary
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3G — Third Generation. 3G refers to the third generation of mobile telephony technology. The
evolution of 3G technology is as follows:
GSM technologies
» GPRS offered speeds up to 48.8 Kbps (began in 2000).
» EDGE reached up to 384 Kbps (2003).
» WCDMA offered downlink speeds up to 1.02 Mbps.
» UMTS supports a theoretical data transfer rate of 21 Mbps.
» HSUPA offered uplink speeds up to 5.76 Mbps and downlink speeds up to 7.2 Mbps.
» HSDPA boosted downlink to 14 Mbps (in 75 countries 2007)
» HSPA+ increased uplink speeds to 11 Mbps and downlink speeds to 42 Mbps.
» LTE Evolved UMTS Terrestrial Radio Access is aiming for 100 Mbps (specifications completed 2008).
CDMA technologies
» 1xRTT offered speeds up to 144 Kbps (2002).
» EV-DO increased downlink speeds up to 2.4 Mbps (2004).
» EV-DO Rev A boosted downlink speeds to 3.1 Mbps (2006).
» EV-DO Rev B can use 2 to 15 channels with each downlink peaking at 4.9 Mbps.
» Ultra Mobile Broadband was slated to reach 288 Mbps but operators might switch to LTE instead.
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802.11 (b, g, n) — A set of WLAN communication standards in the 2.4, 3.6 and 5 GHz frequency bands.
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Access Point (AP) — A device that allows wireless communication devices to connect to a wireless
network using a standard such as WiFi.
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APN — Access Point Name. The APN is an alphanumeric string that identifies the particular network
service that is being accessed. These are used by GPRS and UMTS networks.
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bps — bits per second. The rate of data flow.
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Broadband — High-capacity high-speed, transmission channel with a wider bandwidth than
conventional modem lines. Broadband channels can carry video, voice, and data simultaneously.
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CDMA — Code Division Multiple Access. It is the underlying channel access method used by some
mobile phone standards.
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DHCP — Dynamic Host Configuration Protocol. Software found in servers and routers that
automatically assigns temporary IP addresses to clients logging into an IP network.
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DHCP Server — A server or service with a server that assigns IP addresses.
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DNS — Domain Name System. A system for converting host names and domain names into IP
addresses on the Internet or on local networks that use the TCP/IP protocol.
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