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Topic: Megabits per second


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In the News (Mon 16 Nov 09)

  
  What is Mbps? - a definition from Whatis.com
Mbps stands for millions of bits per second or megabits per second and is a measure of bandwidth (the total information flow over a given time) on a telecommunications medium.
Depending on the medium and the transmission method, bandwidth is also sometimes measured in the Kbps (thousands of bits or kilobits per second) range or the Gbps (billions of bits or gigabits per second) range.
Megabits per second is usually shortened to Mbps.
searchstorage.techtarget.com /sDefinition/0,,sid5_gci212534,00.html   (279 words)

  
 Rule Broadcast Systems - Tech Tips
If you were to put this tape in a camera or recorder that records 25 Megabits per second (assuming it fit), you can be confident that the tape will last as long as the number of minutes printed on the front of the cassette.
A 50 Megabit per second recorder moves the tape across the heads twice as fast as a 25 Megabit per second recorder.
The 100 Megabit per second recorder moves the tape at 4 times the speed as a 25 megabit per second recorder.
www.rule.com /techtip.cfm?techtipID=57   (1151 words)

  
 Megabit per second - Wikipedia, the free encyclopedia
A megabit per second (Mbit/s or Mbps) is a unit of data transfer rate equal to 1,000,000 bits per second or 1,000 kilobits per second.
8 Megabits per second is equivalent to 1 Megabyte per second (ie.
Hence 1 Megabits per second = 0.125 Megabyte per second (ie.
en.wikipedia.org /wiki/Megabits_per_second   (219 words)

  
 TechNotes
By allowing for bursts of up to 10 megabits per second, the DVD specification takes into account the need for short bursts in the data rate to accommodate complex scenes where additional I-frames or higher overall bit allocation are necessary to prevent visible e compression artifacts.
At an average bit rate of 4.7 megabits per second, that leaves approximately 3.5 megabits per second that is dedicated entirely to reproducing the video image.
At an average bit rate of 10 megabits per second, a DVD disc can produce a picture quality that is nearly the equivalent of a studio master tape---the medium from which all pre-recorded software is produced--.
www.isfcalibration.com /DSS.htm   (1652 words)

  
 Bitrate - Wikipedia, the free encyclopedia
In digital multimedia, bitrate is the number of bits used per unit of time to represent a continuous medium such as audio or video after source coding (data compression).
The bit rate is quantified using the 'bit per second' (bit/s or bps) unit, often in conjunction with a SI prefix such as kilo (kbit/s or kbps), Mega (Mbit/s or Mbps), Giga (Gbit/s or Gbps) or Tera (Tbit/s or Tbps).
In less formal contexts the abbreviations "b/s" or "bps" are often used, though this risks confusion with "bytes per second" ("B/s", "Bps").
en.wikipedia.org /wiki/Bits_per_second   (1042 words)

  
 Your best bet in faster LANs - SunWorld - October 1996
If each stream has an upper limit of 100 gallons per second, and there are 50 of those streams entering the main channel, than the maximum flow into the main channel would be 5000 gallons per second.
ATM at 622 megabits per second on the other hand is expected to cost about $4,200 per port in 1998.
Once 100 megabits per second has become the predominate transport speed, move the backbone and transports to ATM if wide-area connectivity is the dominate network link.
sunsite.uakom.sk /sunworldonline/swol-10-1996/swol-10-networking.html   (1650 words)

  
 Glossary - #
It has eight radio channels, each with a maximum link rate of 54 megabits per second; however, maximum user throughput will be about half this, and the throughput is shared by all users of the same radio channel.
Also called Wi-Fi, 802.11b specifies three radio channels, each with a maximum link rate of 11 megabits per second; however, maximum user throughput will be about half this, and the throughput is shared by all users of the same radio channel.
With data rates of less than 220 kilobits per second over 75 meters, 802.15.4 (dubbed "ZigBee" by the vendor group that promotes it) is suitable for many automation and remote-control applications.
www.gartner.com /6_help/glossary/GlossaryNumbers.jsp   (1795 words)

  
 The Chronicle: 11/2/2001: Colleges Try to Figure Out How to Keep Bandwidth Costs Under Control
A megabit is a million ones and zeros of binary data; megabits per second is the common way of measuring bandwidth.
Bandwidth needs range from 3 to 9 megabits per second for smaller colleges to 45 to 90 megabits per second or more for larger research universities.
One plus to buying more bandwidth is that the monthly cost per megabit per second drops somewhat as the volume used increases, he says.
chronicle.com /free/v48/i10/10a04601.htm   (983 words)

  
 SSL Capacity Planning
To determine the processor speed that is required to support the total aggregate traffic, multiply the megacycles per megabit, from the table in Step 4, by the total throughput, as measured in Step 3.
For example, suppose that the kilobits per connection calculated in Step 2 is 200, the total aggregate throughput is 15 megabits, and you require ISA Server to perform SSL to SSL bridging.
For example, suppose that you want to deploy ISA Server in an edge firewall scenario in which 40% of the 20 megabit per second peak traffic is transparent proxy, 35% is forward proxy, and 25% is SSL to SSL with 200 kilobits per connection.
www.microsoft.com /technet/isa/2004/plan/ssl_performance.mspx   (1564 words)

  
 Copper In Your Home: Home Planning - DSL or Cable ? Which is Right for You?
Typical speeds range upward from 384 kilobits per second (that is, 384 kbps) to 8 megabits per second (8,000 kbps) and even higher, depending on a variety of factors.
They found that it is possible to transmit data at a rate of several megabits per second over two or three miles of copper and even more data over shorter distances.
A single coaxial cable of the type used in the cable TV system can carry data at rates of hundreds of megabits per second, in part because the design of the cable shields it from interference.
www.copper.org /copperhome/HomePlan/DSL_r_cabl.html   (732 words)

  
 Untitled Document
Download data from G.dmt ADSL at the rate of 8 megabits per second and upload data at 1.5 megabits per second.
Download speeds up to 1.5 megabits per second and a maximum upload data rate is 384 kilobits per second.
HFC modems offers theoretical download speeds from 3 to 30 megabits per second; however the speed is more from 400 to 1440 kilobits per second.
www.uh.edu /~cjforbes/page4dsl.htm   (645 words)

  
 Mbps (Megabits Per Second) Definition
Stands for "Megabits Per Second." One megabit is equal to one million bits or 1,000 kilobits.
While "megabit" sounds similar to "megabyte," a megabit is roughly one eighth the size of a megabyte (since there are eight bits in a byte).
Mbps is used to measure data transfer speeds of high bandwidth connections, such as Ethernet and cable modems.
www.techterms.org /definition/mbps   (86 words)

  
 DSL - Digital Subscriber Line - Really Fine Web Design
The G.dmt variety can download data at up to 8 Megabits per second, and send data upstream at up to 1.5 Megabits per second, if the modem is located within 10,000-12,000 feet of the phone company's CO (central office).
It is based on ADSL, and offers downstream speeds up to 1.5 Megabits per second and a maximum upstream data rate of 384 Kilobits per second.
It is symmetric, with a maximum 1.5 Megabits per second traveling both ways over two copper phone lines, or 2 Megabits per second over three phone lines.
www.really-fine.com /DSL.html   (1171 words)

  
 Swimming Upstream With Uploads - Technology
But most broadband users are limited to 256 kilobits per second, and millions still chug along at 90 to 128 kilobits per second.
In fact, many could even deliver up to 30 megabits per second per user, if customers were willing to pay for it.Cable uploads, on the other hand, are severely constrained by current technology.
The first DSL version, which could become available as early as next year, offers download rates of up to 24 megabits per second (though in real-world deployments subscribes will probably get between 6 and 15 megabits per second, depending on their distance from the central office).
www.10news.com /technology/3511450/detail.html   (1065 words)

  
 The Shape of Days: H.264 changes everything … again   (Site not responding. Last check: 2007-11-03)
Whereas MPEG-2 needs 20 to 25 megabits per second per channel for HDTV content, H.264 can do a superior job with as little as eight megabits per second, allowing providers to carry three times as many channels as they could with the older encoding technology.
A picture 480 pixels high and a frame rate of 29.97 frames per second is exactly what you get when you turn on your standard-definition television.
A cable modem that can sustain a download speed of two megabits per second would be able to download that clip in more-or-less real time.
theshapeofdays.com /2005/05/h264_changes_ev.html   (1868 words)

  
 Network Tutorial: Glossary
A link segment is a cable that connects a computer to an interconnecting device, such as a repeater or concentrator, or connects a interconnecting device to another interconnecting device.
Sneaker-Net - Refers to a manual method of sharing files in which a file is copied from a computer to a floppy disk, transported to a second computer by a person physically walking (apparently wearing sneakers) to the second computer, and manually transferring the file from floppy disk to the second computer.
Star Topology - LAN topology in which each node on a network is connected directly to a central network hub or concentrator.
members.tripod.com /barhoush_2/glossary.htm   (1678 words)

  
 HOW DSL WORKS
DSL connects your computer to the Internet at speeds as fast as 52 Megabits per second, using the copper lines that already bring you phone service.
The DSL that Bell SOuth offers in Miami is called G-Lite or RADSL (Rate Adaptive DSL) and has a download speed of up to 1.5Mbps and an upload speed of up to 360Kbps, depending on how far away you are located from the C.O. of the telephone company.
The DSLAM separates the voice from the data signals, sending the latter to an ISP (which is frequently the provider itself) and from there to the Internet at large.
www.fiu.edu /~klonarid/Papers/papdsl.htm   (460 words)

  
 Glossary
100BaseT - Ethernet specification for unshielded twisted pair cabling that is used to transmit data at 100 Mbps (megabits per second) with a distance limit of 100 meters per segment.
1000BaseTX -Ethernet specification for unshielded twisted pair cabling that is used to trasmit data at 1 Gbps (gigabits per second) with a distance limitation of 220 meters per segment.
It is primarily used for a high speed backbone of a network.
fcit.usf.edu /network/glossary.htm   (1986 words)

  
 Blackberry Wireless Handhelds Technology for Today
It operates at 2.4Ghz, giving it the cost advantage of 802.11b, and it has the 54 megabits per second speed of 802.11a.
Typically, 802.11b WiFi radios handle up to 7 to 11 megabits per second, although in practice, the data rate can fall to 1 megabit per second if there is a lot of interference between the devices.
802.11a and 802.11g can handle up to 54 megabits per second (although 30 megabits per second is more typical).
www.softrim.com /techtoday_wifi.asp   (915 words)

  
 Galaxy Internet Services
When you use a normal modem on a line like this, it can transmit data at perhaps 45 kilobits per second.
We currently have a special T1 offer which is $599.00 per month with a $500 setup fee.
There is a cancellation fee of $300 if the service is terminated within the second 12 months of the contract.
www.gis.net /~sotis/traditionalT.html   (1047 words)

  
 Basic Home Networking-Hardware
The second portion usually is either base (for baseband; a single channel or frequency operates on the cable) or broad (for broadband; multiple frequencies operate on the cable).
A hub with a switch (or switched hub) allows one segment to operate at 10 megabits per second and a second segment to run at 100 megabits per second.
Most switches autosense 10 or 100 megabits per second speeds and allow every port’s connection to operate at its maximum speed (i.e., every 10/100 NIC operates at 100 megabits per second).
www.noccc.org /bytes/articles/v01/446.html   (1947 words)

  
 What do "Mbps" and "kbps" mean?   (Site not responding. Last check: 2007-11-03)
It is important to remember that the measurements for data transfer rates and file sizes are different.
For instance, a transfer speed of 1 Mega bit per second will not download a 1 Megabyte file in 1 second.
This is because their are 8 "bits" in 1 "byte", therefore at 1 Mega bit per second a 1 Megabyte file would theoretically take 8 seconds to download and so on.*
www.eastserve.com /opencms/opencms/My_Computer/broadband/faqs/glossary/mbps_kbps.html   (145 words)

  
 RedOrbit - Technology - Comcast Plans to Upgrade; Verizon Will Debut Fiber Optics
Comcast High Speed Internet customers started the year with a download speed of 3 megabits per second and upload speed of 256 kilobits per second on its entry-level service.
For comparison, a 4 megabyte video clip file would take 12.8 minutes to download with a dial-up connection of 56 kilobits per second, 25 seconds with Verizon's 1.5 megabits per second DSL connection and 12 seconds with Comcast's 3 megabits per second connection.
Its entry-level broadband product will come with a download speed of 5 megabits per second and upload speed of 2 megabits per second.
www.redorbit.com /news/display/?id=125665   (1062 words)

  
 Ximeta Inc.
10/100 - (describing a network adapter) capable of operating at 10 or 100 megabits per second.
Mbps - Megabits per second; one million bits per second; a unit of measurement for data transmission.
USB 1.0 provides a data rate of 12 million bits oer second (Mbps), USB 2.0 ("Hi-Speed USB") achieves 480 Mbps and is fully compatible with the previous version.
www.ximeta.com /technology/ndas/technologie11_en.php   (2234 words)

  
 Telechannels   (Site not responding. Last check: 2007-11-03)
Speed: Currently 10-100 Megabits per second, may be faster in the future.
Speed: 10-100 Gigabits per second per fiber in the lab, usually 100 Megabits commercially.
Speed: 20 Megabits per second on the 2.4 Gigahertz radio frequency.
www.uvm.edu /~jleonard/cdae85/Telechannels.html   (84 words)

  
 Glossary - T
The most common are T1 lines, which typically carry digital data at 1.5 megabits per second (Mbps), and T3 lines, with transmission capacity of up to 44.7 Mbps.
The term is particularly meaningful in information storage and retrieval systems, in which throughput is measured in units such as accesses per hour.
The rate at which information is passed through a communications medium, generally measured in bits per second.
www.gartner.com /6_help/glossary/GlossaryT.jsp   (3973 words)

  
 360 Megabits Per Second for Siemens Wireless Network
Europe : At the "Mobile Internet 2010" forum held by the German Ministry of Education and Research on September 14 and 15, Siemens presented the latest results from its mobile communication research for the first time to the general public.
On a test system, videos and music as well as a Microsoft NetMeeting conference were transmitted in wireless mode at data rates of up to 360 megabits per second (Mbps).
We expect mobile systems with transmission speeds of more than 100 megabits per second to be the standard in about ten years", said Christoph Caselitz, President of Networks within Siemens mobile.
www.3g.co.uk /PR/Sept2004/8321.htm   (508 words)

  
 File Server Comparison: Microsoft Windows NT Server 4.0 and NetWare 5
Its primary performance metric is throughput in bytes per second.
So a more responsive file server will be able to handle more operations per second which will yield higher throughput.
We left out the cost of the computer because the tests were run on the same system and because we assumed you were making a decision about which file server software to use.
www.mindcraft.com /whitepapers/nts4nw5filesvr.html   (2393 words)

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