Broadband Internet Information

Some DSL Broadband Definitions


Often too many people get confused with all the definitions, here we have explained in easy to understand terms.

ADSL:
Asymmetric Digital Subscriber Line - asymmetric meaning it's faster downstream than upstream.

ASAM:
Advanced Services Access Manager -Whether you have a DSLAM or ASAM in your exchange doesn't really matter. They do the same thing. See DSLAM's as well.

ATM:
Asynchronous Transfer Mode - a method of encapsulation which is capable of many virtual circuits. With these, providers (ISP's) can split an ATM connection (155Mbit or 622Mbit) up into many connections. ATM isn't just used for DSL but in the case of DSL it's used to provision each customer.

Contention Ratios:
A contention ratio is the number of users to xMbit of bandwidth. For example some providers offer 2Mbit DSL, with a ratio of 50:1, meaning 50 users to 1Mbit of bandwidth.

CPE:
Customer Premises Equipment, the term that describes the equipment used on the customer end of a connection, for example your DSL modem/router or cable modem.

DSL:
Digital Subscriber Line.

DSLAM:
Digital Subscriber Line Access Multiplexer - They are placed in DSL enabled Telecomm exchanges, when your modem syncs up and the DSL light comes on, it means you are connected. When data travels down your connection, it goes from the CPE -> DSLAM -> RAN -> ISP

ERX:
Edge Routing Exchange. See RAN.

IPNet:
Telecommunications backhaul networks for carrying traffic from the customer to the ISP, i.e. carrying traffic from RAN's to ISP's.

Ping or Latency:
A ping measures the time in milliseconds that it takes for a packet to travel from your computer to a remote computer and back to you again. Just because you can't ping a given host, quite a lot of providers are beginning to filter ICMP (pings come under this protocol) traffic because it is commonly used to attack hosts and wastes a lot of bandwidth. Many providers also give low priority to ping (ICMP) traffic which may mean your ping at a command line isn't very good, but in say a game, things may be fine.

RAN:
Regional Access Node These aggregates many DSLAM's connections and then feed the data to an ISP

RTT
Round Trip Time - the time it takes in milliseconds for a packet to go from A to B and back again. See ping.

SDSL
Symmetrical Digital Subscriber Line - symmetrical meaning the same speed up and down.

Units

There is a major difference between UPPER and lowercase

MB = MegaBytes
Mb = Megabits
kB = KiloBytes
kb = Kilobits

MB/s = MegaBytes per second
Mb/s = Megabits per second
kB/s = KiloBytes per second
kb/s = Kilobits per second

There is 8bits to a Byte, 8kb = 1kB

1Meg connections only transfer at 128kB/sec or an 8Mb connection only transfers at 1024kB/sec or 1MB/s

Steve
Private Mail Services
http://www.private-services.com

  


MORE RESOURCES:

Internet America Reports Net Income and Adjusted EBITDA Profit for the Quarter ...
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SUSSEX: Residents may benefit from Comcast program
Delmarva Now
MILTON -- A little more than five months after its inception, Comcast's Internet Essentials program -- an initiative to give low-income families affordable access to broadband Internet at home -- has proven to be a success.

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LSU AgCenter helping rural areas connect to Internet
Alexandria Town Talk
Connect My Louisiana is a broadband Internet education and awareness initiative for Louisiana through a partnership between the Louisiana Division of Administration's Office of Technology and the LSU AgCenter, according to Dwight Landreneau, ...

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Broadband Need Asks For Your Help
WTAP-TV
Make sure that we get the data that we need evaluate exactly what service is out there and when," explains Jerry Bivy of New Era Broadband. Broadband would mean a different way to receive internet without Cable or DSL, helping everyone in Washington ...



CNET UK

Tesco offers unlimited broadband for £2.50
Total Telecom
Tesco Broadband on Monday launched a low-cost price plan that offers unlimited Internet access to UK customers for just £2.50 per month. The 12-month deal is available until 31 May to members of the UK supermarket giant's loyalty scheme.
Tesco unlimited broadband now £16.25 per monthCNET UK
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New players are shaping the future of Web TV
Crain's New York Business
Finally, Nielsen came out with its third-quarter 2011 Cross-¬Platform Report, which showed a spike in the number of TV viewers who have broadband Internet service but no cable subscriptions—and who stream video more, and watch TV less, than the ...

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Ultrafast broadband in Hamilton from July
Waikato Times
In the last six months Ultrafast Fibre has laid 90km of ultrafast broadband fibre optic cable in Hamilton and will have laid a further 15km by the end of the month at the rate of 793 metres per day. At the test centre internet service providers, ...



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FierceCable
SuddenLink Communications is beginning to notify its high-speed Internet subscribers in Texas that it will place caps on their broadband usage. The cable MSO first announced the controversial usage cap strategy last October, saying that it would hit ...



USA TODAY

Will Lifeline guarantee high-speed Internet access for all?
Los Angeles Times
Soon, the program might also help subsidize their access to high-speed Internet as well. On Tuesday, the Federal Communications Commission, which manages Lifeline, said it will spend $25 million on a pilot program to examine what it would take to ...
FCC votes to fund broadband service for low-income homesWashington Post (blog)
FCC to reform telephone subsidies, could eliminate Link Up to fight corruptionWashington Times
FCC Providing Broadband To Poor Families Through LifelineWebProNews
Wall Street Journal -Bloomberg BNA
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State to get faster Internet
Oxford Press
By Kelli Wynn State officials are still determining how much they will charge individual institutions to have full access to Ohio's soon-to-be improved broadband network . “We don't have our cost breakdowns yet,” said John Conley, chief of educational ...

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