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1000BASE-SX GBIC. Gigabit interface converter (GBIC) is a standard for transceivers.First defined in 1995, it was used with Gigabit Ethernet and Fibre Channel.By standardizing on a hot swappable electrical interface, a single gigabit port can support a wide range of physical media, from copper to long-wave single-mode optical fiber, at lengths of hundreds of kilometers.
The SFP replaced the larger gigabit interface converter (GBIC) in most applications, and has been referred to as a Mini-GBIC by some vendors. [ 3 ] SFP transceivers exist supporting synchronous optical networking (SONET), Gigabit Ethernet , Fibre Channel , PON , and other communications standards.
Optical fiber transceivers are most often implemented as user-swappable modules in SFP form or GBIC on older devices. IEEE 802.3ab, which defines the widely used 1000BASE-T interface type, uses a different encoding scheme in order to keep the symbol rate as low as possible, allowing transmission over twisted pair.
In October 2014, the NBASE-T Alliance was founded, [12] [13] initially comprising Cisco, Aquantia, Freescale, and Xilinx. By December 2015, it contained more than 45 companies, and aimed to have its specification compatible with 802.3bz. [14]
The physical coding sublayer (PCS) is a networking protocol sublayer in the Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet standards. It resides at the top of the physical layer (PHY), and provides an interface between the physical medium attachment (PMA) sublayer and the media-independent interface (MII).
Cisco Systems and Comcast announced their 100GbE trials in June 2008. [72] However, it is doubtful that this transmission could approach 100 Gbit/s speeds when using a 40 Gbit/s per slot CRS-1 platform for packet processing. Cisco's first deployment of 100GbE at AT&T and Comcast took place in April 2011. [73]
The physical-layer specifications of the Ethernet family of computer network standards are published by the Institute of Electrical and Electronics Engineers (IEEE), which defines the electrical or optical properties and the transfer speed of the physical connection between a device and the network or between network devices.
Long Reach Ethernet (LRE) was a proprietary networking protocol marketed by Cisco Systems, intended to support multi-megabit (5 to 15 Mbit/s) performance over telephone-grade unshielded twisted pair wiring over distances up to 5,000 feet (1.5 km). [1]