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Broadcom

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+#REDIRECT [[Broadcom]]
-<!--  Commented out because image was deleted: [[Image:125HSM logo.JPG|frame|left|125HSM logo]] -->'''125 High Speed Mode''' (or '''125HSM''') is [[Broadcom]]'s proprietary [[data frame|frame]]-[[Burst mode (computing)|bursting]] and [[data compression|compression]] [[technology]] to improve [[IEEE 802.11#802.11g|802.11g]] [[wireless LAN]] performance. The [[throughput]] [[bit rate|transmission speed]] limit when using 125HSM is claimed to be up to 35%-40% higher than standard 802.11g.
+{{Rcat shell|
-The "125" in "125 High Speed Mode" refers to performance at a theoretical [[data signaling rate|signaling rate]]: a 125HSM device can achieve maximum actual throughput of up to or greater than 34.1[[megabit per second|Mbit/s]], which is the equivalent throughput of a system strictly following all 802.11g [[communications protocol|protocols]] and operating at a signaling rate of 125 Mbit/s.
+{{R to related topic}}
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-When 125HSM was originally announced in 2004, it was called '''Afterburner'''.  It's currently marketed as a proprietary [[extension (computing)|extension]] of Broadcom's [[Xpress technology]], their standards-based frame-bursting approach that is supported by their 54g [[Wi-Fi]] [[chipset]]s.  Other vendors have marketed 125HSM products under a variety of names:
-* '''g+ SuperSpeed''' ([[ZyXEL]])
-* '''G Plus''' or '''HSM''' ([[Belkin]])
-* '''125* High Speed''' or '''Turbo G''' ([[Melco | Buffalo]])
-* '''SpeedBooster''' ([[Linksys]])
-* '''125 Mbit/s 802.11g'''
-(It is not the same as "Super-G" or "108 Mbit/s" technology.)[http://www.techworld.com/mobility/features/index.cfm?FeatureID=641]
-Manufacturers that have licensed 125HSM technology from Broadcom include [[Belkin]], [[Buffalo Technology]], [[Dell]], [[Gateway, Inc.|Gateway]], [[Hewlett-Packard]], [[Asus]], [[Linksys]] (now part of [[Cisco Systems]]), [[Motorola]], and [[U.S. Robotics]]. In general, 125HSM products from different vendors are all [[interoperability|interoperable]] in 125HSM mode.
-HSM is one of several competing proprietary approaches that were developed to increase 802.11g performance of wireless devices, such as [[Multiple-input multiple-output communications|MIMO]]-based extensions from [[Airgo Networks]], [[Nitro (wireless networking)|Nitro]] from [[Conexant]], and [[Super G (wireless networking)|Super G]] from [[Atheros]]. 125HSM can be more successful in radio-dense environments than non-standard [[channel bonding]] approaches to enhance 802.11g performance. Broadcom claims that in the real-world, 125HSM provides up to 17% better performance over channel bonding approaches such as Super G because other [[ISM band]] devices—such as neighboring [[wireless network]]s, [[cordless telephone]]s, [[baby monitor]]s, and [[Bluetooth]] devices—can [[interference (communication)|interfere]] with channel bonding at [[distance]]s of up to 150 [[foot (unit of length)|feet]].
-==External links==
-{{Wikibookspar||Wifi}}
-* Press release announcing 125HSM as [http://www.broadcom.com/press/release.php?id=507846 Afterburner]
-* [http://www.54g.org/about_54g_speed.php 125 High Speed Mode] page within the [http://www.54g.org/ 54g Wi-Fi technology] site
-*[http://www.usr.com/download/whitepapers/maxg-keylabs.pdf KeyLabs benchmark comparison] of 125 Mbit/s products by US Robotics, Linksys, Netgear, Belkin, and DLink. Also comparisons to some "Draft 802.11n" competitors.
-* Article at SmallNetBuilder (formerly [[Tom's Hardware Guide]]) [http://www.smallnetbuilder.com/content/view/24649/96/1/9/ testing 125HSM performance]
-[[Category:IEEE 802.11]]
-{{Wireless-stub}}