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Broadband Genie introduces 22Mbps broadband
Super-fast broadband is now available from Broadband Genie ( http://www.broadbandgenie.
co.uk ), the comparison specialist which allows consumers to
compare broadband online. This latest offering is courtesy of UK
Online, which is now offering...
Cut the Wires?
Cut the Wires?
How often do you see someone sitting in an airport lounge or coffee shop working on a laptop computer? Sure they could be playing solitaire, but the odds are increasing that they are corresponding via e-mail, sending a report back to...
Squeezed Broadband?
If you could receive a penny for every website on the net that promises to speed up your Internet Service, you would be rich. You will find a massive amount of software programs that promise to speed up your connection for free! Beware of these...
VDSL (Very high bit-rate Digital Subscriber Line) - Description
VDSL is a developing broadband communications technology, which allows users to upload and download data at extremely high speeds, over a Digital Subscriber Line . Speeds can be as high as 1.5 to 2.3 Mbps for upstream (sent) data, and 13 - 52 Mbps...
Wanadoo Broadband
Information On Wanadoo Broadband
It has always been a goal of Wanadoo to be at the top of the UK's broadband industry. Wanadoo was one of the first ISPs to provide unlimited dialup, and it was also the first ISP to provide 2Meg broadband at under...
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Some DSL Broadband definitions
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, cable modem, black box on Wired Country etc.
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
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