On 2023-03-03 12:47, James Knott via talk wrote:
On 2023-03-03 12:17, James Knott wrote:
With cable the all the customers on the segment are sharing the same
bandwidth.
So if your the first one on the cable you have the full speed to
yourself but if your number 100 then you and the 99 other people are
sharing that speed.
If you're on Fibe, you only have your own wire out to the node in the
neighbourhood. From there, it's shared. Not much different from cable.
Well with cable you can have 1000 people connected to the line card on
the node before your on the shared back-haul.
So its shared up front and on the back.
Forgot to mention, even with original ADSL, with the dedicated copper
pair, going back to the CO, the Internet connection was still shared
at the DSLAM. Several years ago, I was setting up some DSLAMs for
Sprint Canada, just before Rogers bought them. Each DSLAM shelf had 32
lines connected to it, but all that traffic wound up on a DS3, which
was 45 Mb. So, you had 32 ADSL lines sharing that 45 Mb.
That kind of makes my point.
The last DSLAMs I looked at well over 5 years ago were 24 ports with
multiple 1G back-hauls
That is less than full bandwidth to less than half the available bandwidth.
On the other hand DOCSIS can support something like 1000 subscribers on
a cable interface, and then you have the same issues of back-haul.
GPON and 10-GPON I believe are limited to 128 subscribers per fiber
interface.
In all cases we have a funnel.
The question is how big is the mouth of the funnel and how small is the
throat.
I don't have a particular love for one technology over another.
But with decades of experience with DSL I am familial with all the warts
and features of the technology.
--
Alvin Starr || land: (647)478-6285
Netvel Inc. || Cell: (416)806-0133
[email protected] ||
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