xDSL
Robert,
Great post.
You can never have to much Bandwidth!
With all the technologies involved in bringing bandwidth to you and me
it's a nightmare trying to keep up. I thought I would clear up one issue.
Certainly encouraging that cable modems have reached a standard but I don't believe XDSL has.
There is not a standard for xDSL, which is a generic for all forms of DSL ie. ISDN, HDSL, ADSL, VDSL.
There is a standard for ADSL (1.5 -8Mbps), but what is currently being
hammered out is the standard for ADSL Lite also known as G. Lite
or Splitterless ADSL. This is the cheap version 1.5Mbs.
Vendors developed G. Lite because our TELCO's and RBOCs are to Freaking Cheap to deploy the real stuff. To have full blown ADSL the TELCO's would have to roll a truck to the subscribers home to install a POTS splitter. In full blown ADSL a POTS splitter, splits the Home or Business telephone wire from the connection going to the computer outside the home. This is because you have un-terminated phone jacks in your home, and Telephone wires run next to Electrical wiring, or pass next to your Air Conditioning wiring or a host of other interferes.
ADSL runs up to 18,000ft (a little over 3 miles).
Full Blown ADSL will be deployed eventually, when we need more than 1.5 Mbps of bandwidth, which in my estimation won't be too far down the road.
Of course VDSL pumping 52Mbps out to one mile will be coming, all that is needed is for the TELCO's to run fiber to a central DSLAM which can pump this speed to users in a one mile radius around the DSLAM.
This is cheap in comparison to having to run Fiber To The Curb (FTTC) to everyone who requires it.
Think of that one mile radius as a spider web, imagine the cost of running fiber to every connection!
With VDSL they can run a single strand to a DSLAM and save a ton. It will happen!
Because VDSL can pump multiple channels of HDTV to your home and still give you lots of bandwidth for your NET connection, and as with ADSL, you can still use the Telephone at the same time on the same small Copper-Twisted Pair that you currently use. Do the TELCO's want to become your Cable TV Supplier, you bet they do! But they better get up off their Cheap Tired Ass soon.
The VDSL standard is very near completion. In fact, Revision 14 of the VDSL System requirements was just loaded on the T1E1.4 standards site yesterday.
VDSL is already deployed all over Singapore.
Regards,
I Want My DMT
JW@KSC
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