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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:

Virgin Connect broadband internet business launched in Russia
Telecom Paper (subscription), Netherlands - May 16, 2008
Working with Trivon, Virgin has secured licences to launch the broadband internet service in 32 regions and 20 of the largest cities across the country.


Comstar-UTS to launch broadband internet in Orenburg
Telecom Paper (subscription), Netherlands - May 16, 2008
Comstar UTS subsidiary RTC-Orenburg is to complete a project to increase network capacity to accommodate for internet broadband access service in Orenburg ...


Increasing adoption of Broadband Internet in the Arab World is set ...
Al-Bawaba, Jordan - May 14, 2008
The silver lining is that more households are connected to broadband Internet services which would positively affect adoption of Internet-based services ...


Mio Group Plans Launch of Mobile Voice and Wireless Broadband ...
FOXBusiness - May 10, 2008
Mio will be the first in the Caribbean to offer affordable unlimited wireless broadband Internet access and voice plans that include voicemail and unlimited ...


’SA’s telecommunications bottlenecks to be broken over the next ...
The Times, South Africa - May 16, 2008
"Although broadband penetration locally remains low, the number of people connected to broadband Internet services will grow dramatically over the next few ...
Follow The Latest Trends In The Asian Telecommunications, Mobile ... Business Wire (press release)
all 12 news articles


Broadband Internet growing rapidly in Tennessee's rural areas
WBIR-TV, TN - May 13, 2008
By NAOMI SNYDER Staff Writer A non-profit group that works to expand broadband Internet access said half of all Tennesseans now have broadband service at ...
Tennessee businesses jumping on broadband bandwagon Bizjournals.com
Half of Tennessee homes have broadband, group says Knoxville News Sentinel
Connected Tennessee’s Impact Evident in State’s Broadband Growth Emailwire
Bizjournals.com - Knoxville News Sentinel
all 18 news articles


800-Mile Underwater Cable to Bring Broadband Internet Access to ...
TMCnet - May 13, 2008
... under a contract with Indonesia-based PT Indosat Tbk – is expected to meet a growing demand in southeast Asia for high-speed broadband Internet access. ...


Comstar Ukraine launches broadband internet, IPTV bundle
Telecom Paper (subscription), Netherlands - May 8, 2008
Comstar Ukraine launches Double Play, a bundle which includes a broadband internet service and an IPTV service. Users can choose between six tariff plans ...


The Line (subscription)

$270m set aside for broadband internet
The West Australian, Australia - May 13, 2008
The federal government will provide $270.7 million over four years to extend the Australian Broadband Guarantee program until 2012. ...
$4.7 billion for broadband network in Budget NEWS.com.au
all 47 news articles


Ghana: Broadband Internet Facility in U/E Restored
AllAfrica.com, Washington - May 2, 2008
NINE DAYS after the breakdown of the Broadband Internet Facility in the Upper East Region, operators of the facility, Ghana Telecommunications Limited (GT), ...

Broadband-Internet - Google News



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