This page for all documented refences to Gigabytes in the last 25 years.

e.g. IEEE defintion [1:IEEE Standard Dictionary of Electical and Electronics Terms (Std-100 1984)] of 'bit' : (1) A contraction of the term "binary digit"; a unit of computer data represented by either a zero or a one. (2) A unit of storage capacity. 'byte' - a binary character string operated upon as a unit and usually shorter than a computer word. Frequently connotes a group of eight bits. See also: word; string.

gigabit - 1,000,000,000 bits = One billion bits = One thousand million bits. > Gbps - Gigabits per second; also Gbits/s.



FOLDOC (Free Online Dictionary of Computing) - 1995


<unit> 2^30 = 1,073,741,824 bytes = 1024 megabytes.

Roughly the amount of data required to encode a human gene sequence (including all the redundant codons).

See prefix.


megabit (Mbit)

Used to indicate data transmission rates as x million bits (1,000,000 bits); e.g. "10 Mbit/sec" means "10 Million bits per second" or "10 Megabits per second."

("(May 1992 quote, RFC ): Production TCP implementations currently adapt to transfer rates in the range of 100 bps to 10**7 bps and round-trip delays in the range 1 ms to 100 seconds. Recent work on TCP performance has shown that TCP can work well over a variety of Internet paths, ranging from 800 Mbit/sec I/O channels to 300 bit/sec dial-up modems [Jacobson88a]. "

10 ** 6 =   1 000 000 (one million / a 'mega-' / 1M bps)
10 ** 7 = 10 000 000 (ten million / 10M bps )


Note to marketing people: a network capable of GigaBytes per second data transfer would have to exceed a speed of [1,073,741,824*2 or more, since it's plural*8 bits per Byte=] 8,589,934,592 bits per second (~ 8,590 Mbits per second).

Current top-of-the-line: 10000BASE Gigabit Ethernet [10000Base-FX = 1 Gbps over Fiber Optics [802.3 or Ethernet II (DIX) ]

December 2006 - Siemens Achieves 107 Gbps over a Single Fiber Channel

Researchers at Siemens, working in cooperation with Micram, the Fraunhofer Institute for Telecommunications (Heinrich-Hertz-Institut) and Eindhoven Technical University, achieved an optical transmission rate of 107 Gbps over a single fiber channel using purely electric processing in both the transmitter and receiver.

The newly developed transmission and receiving system processes the data by purely electrical means directly before and after its conversion into optical signals. The test was conducted at a long-haul network at one of world’s largest optical network operators, in which Siemens has previously deployed a 40 Gbps network for commercial use.

A few months earlier, Siemens researchers already proved the feasibility of a receiver with 100% electrical processing for optical transmission at 107 Gbps in which the signal from the photo diode is picked up and processed directly by a chip. The optical transmitter has been "fully electrified."

"In the spring of 2006 we demonstrated the system with a fully electric receiver," said Dr. Rainer H. Derksen, project coordinator at Siemens Corporate Technology in Munich. "At that time we were still using optical multiplexing in the transmitter. Now we’ve designed a complete system with 100% electrical processing of the data in both the receiver and the transmitter."

Siemens said the first commercial products based on the prototype will be available on the market within a few years. The company expects the technology will find deployments in 100 Gbps Ethernet systems. [1] [2]

IEEE Xplore 2.0: 10 Gbps transmission over standard ...

IEEE is interested in specifying the next generation 10 Gbps copper cable Ethernet network, termed 10000BASE-T, in the not too distant future. ...

November 2006 - Cisco Unveils SAN Fabric Switch

Cisco introduced a Multilayer Fabric Switch that provides enterprise-class capabilities such as virtual Storage Area Networks (VSANs), advanced security and high availability. The Cisco MDS 9124 Multilayer Fabric Switch provides up to 24 4-Gbps Fibre Channel ports in a compact 1 one rack unit form factor with line-rate performance on each port. Customers can select eight, 16 or 24 ports and can add ports as needed.

Cisco said has garnered broad support from storage vendors that participate in its original storage manufacturer (OSM) and solution technology integrator (STI) partner programs. Partners that intend to sell the Cisco MDS 9124 Multilayer Fabric Switch include Dell, EMC, Hitachi Data Systems, HP, IBM, Network Appliance, Sun Microsystems and Xiotech. < MDS 9100 Series
20-Nov-06 [1]

market: Enterprise, Storage Networking