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Justin,
I just replaced a T-1 price feed with DSL (not by choice BTW) as
recommended by a tech at GS. Thanks to your explanation I now
understand why he felt the way he did.
However, I just finished a discussion with one of the supervisors at AT
& T global, because the actual transmission rate that I purchased was
usually never attained in real life.
He said that the realizable rate, which is what they sell, is dependent
upon how many actual user connects there are present on all the
distribution lines outgoing from my local telephone switching station.
The more DSL connects the slower the feed.
Does that make sense, and if it does, would it be reasonable to believe
that transmission rates will only go down as more DSL customers are
added even if they allocate a fixed percentage of the traffic to DSL?
Thanks for the feedback.
Richard Funkhouser
Justin T Fanning wrote:
DSL:
Ditribution - Big internet pipe comes into exchange, goes into a unit
called a dslam (think of it as a managed ethernet switch) signal from
each port joins customers wire pair ;
pro1 - usually a contention ratio is offered, meaning a vague ratio of
bandwidth available vs price your paying exists ;
pro2 - Usually the basic phone service is Government protected in most
countries, so if a service failure is due to a physical problem with
the wiring your guaranteed a quick repair ;
pro3 - Minor: usually self install (faster, no waiting on appointments
etc).
Con - usually a fixed bandwidth, no chance of extra speed outside peek
hours etc ;
Summary... Speed, reliability, low cost ... Chose any two:
Speed + low cost = Cable
Reliability + low cost = DSL
Speed + Reliability = Dedicated circuit
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