300mbps over copper

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HavocXphere

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Still very much in development phase.... only achieved in a laboratory under controlled conditions.

But, exciting times are ahead!
 
The faster it goes around a "corner" it moves out. Normal telephones cables are designed for phones like "nommer asseblief". I am amaze that they get 384 over a telephone cable.

Fiber is the way to go.
 
More importantly we need more cables for back hall traffic, no good having 300mbits to your house if the exchange to the core network is only on 50mbits.
 
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we must remember that phone lines(also the lines used for our DSL) use older cable standards, like CAT-3 cables, the cables we use in our networks today is Cat5e or 6, witch still has a 100m limit, thus repeaters are needed, or the signal has to be boosted.
So getting the speeds we are getting already is a great feat! those guys in the lab deserve some respect!

:)
 
moggie said:
Incorrect assumption.
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Totally agree with you moggie

Networks are complex things, so before we start complaining, first understand how networks work, and understand the current physical limitations...
 
JJC said:
we must remember that phone lines(also the lines used for our DSL) use older cable standards, like CAT-3 cables, the cables we use in our networks today is Cat5e or 6, witch still has a 100m limit, thus repeaters are needed, or the signal has to be boosted.
So getting the speeds we are getting already is a great feat! those guys in the lab deserve some respect!

:)
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just to clear up the 100m refers to the distance, not the maximum speed...
 
Street copper doesn't necessarily comply with category 3 standards, its not that simple unfortunately. It's also worth mentioning that the difference in speed decreases sharply as distance increases. So comparing Ethernet with DSL isn't really fair, as Ethernet, specifically using CAT5e guarantees 1GB/s in a high noise environment up to 100m (90m solid core, 10m stranded wire), variable bit-rate isn't built into the specification for Ethernet (unlike DSL, Ethernet is all or nothing). Also CAT 6 allows Ethernet up to 10GB/s, so not really the same.

I seem to be the only one whom noticed that they accomplished this "feat." by bonding 2 copper pairs. Meaning you need 4 wires to your home, which I'm sad to say very few people in SA have (we use a single pair or 2 copper wires). They also use VDSL2, which isn't the same as ADSL. ADSL reserves the lower portion of the wire frequency range for POTS (plain old telephone service, you know so you can still use your phone line for phoning ;) ) whereas VDSL doesn't allow any POTS on the copper pair.

Lastly less than 1km from the exchange covers very few customers really :(

Its cool but highly doubt we'd ever see it here.
 
I think their technology that works like noise canceling would fail big time once you have noise that doesn't remain constant, which is the reality unlike in lab conditions.
Then again, you can just use normal line bonding to go from 100Mbps over 1 line to 200Mbps over 2 lines instead of their 300Mbps over 2 lines.

In RSA you actually want to avoid copper lines completely due to theft :(

Lastly, I suppose their equipment that do the "noise canceling" would be just as expensive as the equipment for optic fiber networks.
 
I speak under correction.

Each house has 9 lines going to it, I was told this by a telkom guy once, because I burnt my line out. (Downloaded a little to much on my old 56k Modem, before the days of ADSL ) To fix, they just disabled the burnt out line and enabled another one. less than a minute to fix.
 
HavocXphere said:
Sure, but thats hardly a barrier.
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Explain? Last kilometer(s) is arguable the most expensive and time consuming part of the installation.

HavocXphere said:
Really? We've got 2 lines. I know houses with 5 lines.
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Two pairs (IE. 4 wires)? I haven't seen many homes with more than 1 pair, businesses sure, homes, I haven't ever met people who had more than 1 line. You guys must talk a lot. Naturally many homes have 1 pair coming in with 2 pairs running into the home (to extend the line to another room), that is still 1 pair. For it to work you need 2 physical pairs all the way to the DSLAM.

fbman said:
I speak under correction.

Each house has 9 lines going to it, I was told this by a telkom guy once, because I burnt my line out. (Downloaded a little to much on my old 56k Modem, before the days of ADSL ) To fix, they just disabled the burnt out line and enabled another one. less than a minute to fix.
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Highly doubt it, 9 lines as in 9 x 2 or just 9 wires. 9 wires wouldn't make any sense because you'd have 1 wire that has no function. 9x2 would mean you have 18 copper wires. Per home. You have any idea how thick (in terms of mm^2 cross section) a single 8 pair cable is. I've seen one because Telkom recently ran out of capacity in our area and installed a new wire that ran into our complex DB, it's a bit thicker than your average thicker type garden hose (not the thinner kind).

For comparison CAT5e has no protective layers and is not rated for outdoor use they contain only 4 pairs (so you can measure that as comparison). They are also of lower wire gauge than street copper (meaning the actual wires are thinner). So you'd easily have a cable that's 3.5 - 4x the size of a CAT5e cable. Running to every home, imagine a densely populated area and you average Telkom pole, the wires wouldn't even fit on there.

Did I mention those cables are expensive? Highly doubt the story that Telkom installed 9 pairs to every home (inside the home I know its BS, I'm assuming you mean to the telephone distribution pole, most homes only have 1 or 2 pairs running from the distribution pole to the home).
 
For some time now Telkom has been running 2pr cable from the DP to the jack. That is 2 x 2 wires in a single cable sheath.

I seriously doubt that there will be more than this to a RESIDENTIAL property.
 
fbman said:
I speak under correction.

Each house has 9 lines going to it, I was told this by a telkom guy once, because I burnt my line out. (Downloaded a little to much on my old 56k Modem, before the days of ADSL ) To fix, they just disabled the burnt out line and enabled another one. less than a minute to fix.
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Good you said that because it's BS.
 
ponder said:
Good you said that because it's BS.
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Actually, 4 pairs (8 wires) in my case. When I had a noisy line the telkom chappie also tried swapping pairs and eventually replaced all 500m that runs from the street pole up the drive to my house - 6mm black cable. Didn't help - turned out to be water damage at the exchange.
 
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