|
Korean Job Discussion Forums
"The Internet's Meeting Place for ESL/EFL Teachers from Around the World!"
|
| View previous topic :: View next topic |
| Author |
Message |
Gord
Joined: 25 Feb 2003
|
 Posted: Sat Aug 23, 2003 12:43 am Post subject: |
 |
|
| mack the knife wrote: |
BTM,
FLOODERDOOBLES!! The guy who installed our VDSL informed us that we are in fact connected to some sort of localized network that works in a very similar manner with a cable hook-up. In other words, my juice is gettin' sucked dry by the *beep* living next door, and above, and below (who yell and fight all the time...bastards). Case in point, during vacations (recently) and holidays, it's always slower. Much, much slower. In fact, I usually get the "Page not found" message regardless of the website I'm logging onto. . |
Sort of but not really. VDSL works by having a fibre optic line ran to the building, and then from this fibre line in the basement it's connected to your room. Because it's such a short hop from the fibre line to your room, it can handle a much higher data level than traditional connections.
You would need to be talking about hundreds of computers all downloading a megabytes a second each to slow down that building connection.
Unlike cable which shares a bandwidth limit for an entire region.
As for the recent "page not found thing", that's not your local connection's or loop's fault, but thanks to the lovely new comptuer viruses whipping around that are chewing cross-Pacific traffic at rates far higher than normal. You may have noticed that reaching sites in Korea is unaffected. |
|
| Back to top |
|
 |
eamo
Joined: 08 Mar 2003
Location: Shepherd's Bush, 1964.
|
| Posted: Sat Aug 23, 2003 1:36 am Post subject: |
|
|
I've had my cable internet connection from the ABN company for 4 days now. It seems to be just as fast as my KT megapass connection I had last year.
Just one difference.......Price. KT megapass (premium service) was a total of 44,000 per month.
ABN cable internet is 13,000 per month!!
Less than half the price.
I don't know the technical details to prove it is just as fast as KT but I certainly don't feel I have a slow connection. Some Kazaa stuff I did last night was coming in at over 200kps. That's good enough for me. |
|
| Back to top |
|
|
mack the knife
Joined: 16 Jan 2003
Location: standing right behind you...
|
| Posted: Sat Aug 23, 2003 6:31 am Post subject: |
|
|
| Quote: |
| ...you would have to be talking about hundreds of comps. downloading megs per second... |
Is that difficult to imagine in this country (particularly in Seoul)? Me thinks not. |
|
| Back to top |
|
|
Gord
Joined: 25 Feb 2003
|
| Posted: Sat Aug 23, 2003 6:44 am Post subject: |
|
|
| mack the knife wrote: |
| Is that difficult to imagine in this country (particularly in Seoul)? Me thinks not. |
You vastly overestimate the number of people who live in a single building. |
|
| Back to top |
|
|
mack the knife
Joined: 16 Jan 2003
Location: standing right behind you...
|
| Posted: Sat Aug 23, 2003 7:00 am Post subject: |
|
|
| But that's precisely your error. It's not just one building. Again, this from the man who installed our VDSL, who one must imagine knows his stuff. I'm going to take his word over yours. Sorry. |
|
| Back to top |
|
|
mack the knife
Joined: 16 Jan 2003
Location: standing right behind you...
|
| Posted: Sat Aug 23, 2003 7:11 am Post subject: |
|
|
| By the way, all, a cable line is not an option in many areas (mine included). |
|
| Back to top |
|
|
Gord
Joined: 25 Feb 2003
|
| Posted: Sat Aug 23, 2003 7:55 am Post subject: |
|
|
| mack the knife wrote: |
| But that's precisely your error. It's not just one building. Again, this from the man who installed our VDSL, who one must imagine knows his stuff. I'm going to take his word over yours. Sorry. |
I suppose we could sit down and noth say "my installer said this", but I would also like to back it up that I used to do this sort of stuff for a living when I worked for IBM.
What's similiar is that both cable and xDSL run to a local exchange. What's not similiar is everything else beyond that. A cable exchange generally has a thousand or more customers per cell, and they all share the same bandwidth hopping around around from apartment to apartment.
With xDSL, once you are at the exchange, it breaks it down into dedicated pipes to certain points. So instead of 2000 people sharing a T3 connection, you've got 30 people sharing a fibre connection (on VDSL), or dedicated 8Mb connection on ADSL.
The exchanges themselves will hook directly into the high-end Internet pipes equally, so once the data is there is runs smoothly.
While similiar, that last step from the exchange to the home is an issue. With xDSL, you only experience a slowdown if the pipe from the exchange onward is running slow. The chokepoint is never from the exchange to the home.
With cable, the choke point is often between the exchange and home. With 2000 users, the average user gets about 22K each. Most of the time, no one is ever doing anything so people can download at 300K a second without issue.
But thanks to things like P2P software and streaming video/audio, more and more people are always on. Let's say 10% of the people are running P2P software at 100K a second. Well, there's 50% of your total bandwidth gone like that. Now add in games, cruising, radio, and BOOM. Cable gets slowed down if not kept in reduced numbered loops.
You are now wiser. |
|
| Back to top |
|
|
mack the knife
Joined: 16 Jan 2003
Location: standing right behind you...
|
| Posted: Sat Aug 23, 2003 9:22 am Post subject: |
|
|
Thanks for the edumacation,
But...I should point out that the original point of contention was that folks around me are sucking my juice. Therein lies the problem (one of the problems, as you thoughtfully opined) and source of my woes. |
|
| Back to top |
|
|
HardyandTiny
Joined: 03 Jun 2003
|
| Posted: Sat Aug 23, 2003 12:15 pm Post subject: |
|
|
ADSL Seoul, 36,000 plus 5,000 a month
41,000 a month |
|
| Back to top |
|
|
mack the knife
Joined: 16 Jan 2003
Location: standing right behind you...
|
| Posted: Sat Aug 23, 2003 8:28 pm Post subject: |
|
|
| Quote: |
| ...i suppose we could sit down and say "my installer said this"... |
But that's the problem. We couldn't sit down together. Why? Because you would never listen to "your installer" in the first place (let alone little ol' moi) because what could he/I possibly tell you that you don't already know, you being GORD and all?  GORD, self-styled expert on all things Korean.  |
|
| Back to top |
|
|
Gord
Joined: 25 Feb 2003
|
| Posted: Sat Aug 23, 2003 10:00 pm Post subject: |
|
|
| mack the knife wrote: |
| But that's the problem. We couldn't sit down together. Why? Because you would never listen to "your installer" in the first place (let alone little ol' moi) because what could he/I possibly tell you that you don't already know, you being GORD and all? GORD, self-styled expert on all things Korean. |
Horrible lies. I sat down with my installer and said "ok, what the hell is VDSL?" as I had never dealt with that before. As for ADSL, I used to install that. And I had how cable works explained to me back in Canada by one of the Shaw guys who used to come to my store.
Thus I could tell immediately that the claims that the people upstairs and downstairs are impacting your bandwidth was false and a generally oversimplified version of how things work on a city wide scale.
Here, I'll draw you a picture.
As such, you see the flaw with cable. It was an excellent concept back when people wanted short bursts of speed, but was not meant to handle thousands of people transferring gigs of data a day. As you can see, everyone has to share the one common connection which won't have the speed if too many people are using it.
With an xDSL connection, you connection is not limited by local capacity but by the Internet itself. My chewing up 10 gigabytes a day in traffic (I kid you not), does not impact anyone else. My chewing up 10 gigabytes a day on a cable connection would not be an issue by itself, by if me and my hundred closest friends do, then we've just impacted everyone on the local cable loop to the point that we would be cut off.
A solution to cable loop bottlenecks is to greatly increase the number of loops available, but that costs a lot of money that cable providers didn't originally plan on spending. |
|
| Back to top |
|
|
BTM
Joined: 20 Jan 2003
Location: Back in the saddle.
|
| Posted: Sat Aug 23, 2003 10:16 pm Post subject: |
|
|
Gord is right about this, except I'd add
| Quote: |
| The chokepoint is never from the exchange to the home. |
is true, but being too far from the exchange will still degrade your connection quality once you start to hit the upper distance. Not a chokepoint, but a factor. Still, not much of a problem here in Beehive-land, though, I wouldn't imagine.
| Quote: |
| Some Kazaa stuff I did last night was coming in at over 200kps. That's good enough for me. |
And that's all it comes down to, really - if you're happy with the bandwidth, it's all good. I would mention by comparison that I regularly get over 200k with KazaaLite with enough sources on my cheapest/slowest KT DSL connection, so it's 6 of one, half dozen etc etc. |
|
| Back to top |
|
|
FlagWaver
Joined: 12 Apr 2003
|
| Posted: Sun Aug 24, 2003 12:46 am Post subject: |
|
|
DSL in the states (have no idea about Korea)-- from the DSLAM or CO to the residence must be less than 15K feet. Depends on the provider of course....but yes, many times the customer will not get the signal because of this and also because of Bridge Taps....not to mention LOAD coils.
| Quote: |
| A bridge tap is a technique for telephone installs that taps you into a line that runs past your house, rather than terminating at your house. The line doesn't go to any other customer premises, it just ends, maybe a mile up the road. This is useful should people move out, demolish a house or whatever, the phone company can move the tap up or down to service whomever it wishes. Unfortunately, you have a mile of unterminated phone line running up the road ready to pick up any interference, like a huge TV antenna. Because it's not terminated, the signals are reflected and bounce up and down the line and can reinforce or cancel the signals your equipment is trying to send to your ISP. |
Load coils:
| Quote: |
| A load coil is an inductor placed on the local loop by the phone company to improve voice quality. They are placed starting at 3000 feet in 6000 feet intervals and is designed to suppress the exact signal frequencies at which DSL operates. The effect of a load coil is similar, from the perspective of the DSL equipment, to adding 20,000 feet to the line length. DSL does not operate properly through load coils. Load coils are a major source of DSL disqualification. |
This is a great site, used it many a time...
http://www.dslreports.com/faq
| Quote: |
5. Troubleshooting:
Stalls and freezes
I think my DSL line is too slow!
I cannot access the net at all.
Got my DSL Modem but no Sync!
I keep losing sync. How can i stop this?
My DSL disconnects when I answer the phone
Web-sites seem slow on initial connect
My ADSL line cannot send AND receive at advertised rates
MSIE Work Offline / Try Again
Why can I not ping my IP address?
Why Does My Computer Stop Responding Using USB Modem?
Why do I have long delays after rebooting with Win2K and WinXP?
I can browse, but can't download any files.
I'm getting Error 650... what should I do?
Why can't I game with my new Router?
I am unable to connect to some sites recently.
How do I know if my DSL problems come from my house or my telco?
Why do downloads start FAST, then slow down?
What can I do to get better performance out of my DSL connection?
I added a DSL internal modem, now my PC crashes
My latency (ping times) are high, even though my transfer rate is good
I lose line Sync regularly
How come I can't register a user name and password on SWBell over the internet?
I've tweaked, tested, and I still have problems, how do I deal with my ISP?
Problems continuing to use my old (dialup) email
What can I do to ensure clean lines for my dsl connection?
Why can't i set my MTU to 1492 with WinPoet?
Why does my modem take so long to sync with the CO?
My home alarm isn't turned on-will it still affect my DSL signal?
When I pick my phone up, I get a static feedback when the modem synced
Can't access some Web/FTP/Secure sites & troubles with email/VPNs/file transfers
How do I optimize my MTU and RWIN settings for the best broadband performance?
DSL Error Code Identifications |
|
|
| Back to top |
|
|
mack the knife
Joined: 16 Jan 2003
Location: standing right behind you...
|
| Posted: Sun Aug 24, 2003 7:06 am Post subject: |
|
|
Gord,
You are the Picasso of the inchoate school of "internet connection" art. Keep it comin'.
BTM,
200k?!? Schwa??? At best I get 120-130k, on any day at any given time, and that's downhill with the wind at my back. Are you downloading Korean pop songs from a log cabin in the woods with your very own private exchange/loop thingy in the adjoining out-house? |
|
| Back to top |
|
|
Walter Mitty
Joined: 27 Mar 2003
Location: Tokyo! ^.^
|
| Posted: Sun Aug 24, 2003 8:37 am Post subject: |
|
|
| Didn't I see that network diagram over at Maddox's page? |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
