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  • SharkyForums.Com - Print: adsl - dsl - sdsl - cable????

    adsl - dsl - sdsl - cable????
    By cctyler November 19, 2000, 11:27 PM

    Whats the difference?

    I went from cable over to adsl about 9 months ago. I miss the 50k+ upload speed of cable compared to the 17k of my adsl. But then again I usually get 126k download speed on my adsl. Anyway, everyone around here is talking about dsl. Is that like adsl, in that it uses a program to dial up? or is like cable and always connected? My telephone company is offering sdsl in januraray. Will this be like adsl? or more to the dedicated access like cable?
    The reason i ask is because im looking at a router and as far as i know, they dont work with adsl connections. Will they work with sdsl? Is dsl better than adsl and sdsl? Thanks

    By IL96 November 20, 2000, 10:35 AM

    Well I have @home right now and I personally think it SUCKS B@LLS ! Any one in favor ?
    You may consider yourself EXTREMELY lucky if you get 50KB/s uploads on cable. I only had this for the first month, then it became 15KB/s. Downloads are totally unpredictable, depending on what my neighbours are doing because it is not a dedicated line. They do not allow you to run servers, and even if you do run a game server you can only have like 4-6 people with pings oh 130 or worse and a huge amount of lagg. (Quake 3 for ex.)
    And finally their customer service just sucks. 10 minutes on hold is average.
    I say go with DSL, in fact i'm looking for a decent dsl provider myself right now.

    By fake November 20, 2000, 12:46 PM

    Basically, there are 2 types of DSL service on the market now: ADSL and SDSL. ADSL is Asynchronous DSL meaning the downstream speed differs from the upstream speed and is the more popular choice for residential use because it offers faster downloading speed by sacrificing the upload speed. For example, my Earthstink ADSL service is 768kbps/128kbps (best case scenario it'll do that). On the other hand SDSL is Synchronous DSL meaning the downstream and upstream speeds are the same. This service is usually the choice for businesses and is much more expensive than the ADSL service. So, unless you'll be doing alot of uploading or serving, it wouldn't be worth your money. As for the router, the information I've read says that it would work fine for any DSL or cable service. I just ordered the Linksys DSL router with 4 port switch for my service so I shall see how that works when it arrives.

    By wiz November 27, 2000, 04:26 AM

    Right now I have both Cable and ADSL. I got cable first when I moved into my apartment as it was installed within 3 days of moving in and ADSL was going to take some time. Everybody has hit the nail on the head telling you the diff between ADSL and SDSL. The only thing I want to add is the part where you mentioned DSL with an always on connection like Cable. As of right now there are 2 types of DSL you can get, PPPoE/A (Ethernet or ATM) or Bridged service. Most DSL ISP's are going with PPPoE/A now because it's easier for them to manage. It is where when you reboot, you will have to connect manually by actually dialing into the CO (although it's not a phone # you're dialing). With Bridged service, it's just like Cable, where if you reboot, y our internet connection is alive as soon as you get into Windows or your OS of choice. As far as using a router, you can use it with either one of these, as most routers are compatible with either/or.

    Cheers.

    By Down8 November 27, 2000, 04:40 AM

    I never knew there was a type of DSL that wasn't always-on.

    I guess you learn something new every day.

    -bZj

    By wiz November 28, 2000, 05:32 AM

    Well, PPPoE/A is still always on, but there is a possibility that you could get disconnected and have to "manually" reconnect it instead of it just "coming back up". The PPP accounts are more like dialup and easier to implement, and also allow the ISP's to have "self installs" for DSL so they don't have to send a technician out to everybody's house and thus it gets installed faster.

    By Greg Focker December 01, 2000, 06:16 AM

    Pulled from DSL Reports

    quote:ADSL is a service that runs at a different speed up and down, up to 8 megabits/sec down and 1 megabit/sec up, and is limited to distances of around 18,000 ft towards the high end, and cannot run through various devices that can be placed on the phone line such as a DLC (fiber in the line). IDSL is a service that is based on ISDN technology, runs at a maximum speed of 144 kilobits/sec each way, but can go anywhere ISDN can, at a distance of up to 50,000 ft with the currently used versions, and can run through most DLC.

    If gaming is absolutely most important use of the line for you go for the slower SDSL connection because it can give considerably lower pings than ADSL.
    If a mix of gaming and download and general usage is more important, you may be happier with ADSL because you can still get low pings, and you can get the faster downloads.

    If you have heard even something about DSL, you will have heard about distance. Your phone lines normally terminate at a telco office, usually nearby. This distance, (the length of your line between your location and the telco office), is a very important factor in whether or not you can get DSL, and what speed you can get.
    Here are some rules of thumb for distance ranges. Please be aware that especially with non Telco ADSL lines, distance limits for speeds can vary widely from company to company. There are cases where it is policy for "residential" DSL lines not to be offered as far out as functionally identical "business" products!

    Less than 5000 feet you will have little trouble getting all speeds of DSL

    5000-10600 You may have trouble getting the highest speeds on offer

    10600-15000 The danger zone for DSL from national CLECs like Covad and NorthPoint. Speeds on offer are pinned back steadily until they reach 192k for 15,000 feet. If your line is longer than around 15000 feet, they may not accept an order.

    15000-18000 In this range, Telco ADSL is normally still available, although it may be restricted to 300-500k speeds

    18000-22000 Telco ADSL is not available, although in a few areas, RADSL may be a product you can get. RADSL is speed-variable.
    Some smaller DSL specialist CLECs may have solutions for you.

    22000-28000 Using less commonly used DSL equipment, it is still possible to use lines of this length.

    18000-28000 IDSL is an alternative or possibly the only alternative. IDSL is 144k/sec, about four-six times modem speed.
    28000-38000 IDSL is the only alternative

    Right now, your choice is probably going to be either SDSL or ADSL. ADSL is generally available more cheaply than SDSL, and usually from your local Telco, although Covad sells a lot of ADSL lines. ADSL is designed for the home user. (RADSL is a slight variation on ADSL, which supposedly offers a longer reach).

    If you are going to be operating servers I would suggest SDSL if you can get it, not only because the maximum upstream speed is generally faster than ADSL, but because your DSL provider is more likely to understand your needs, give you a fixed ip and be more responsive to technical problems.

    VDSL is DSL delivered over fibre to some lucky lucky people, US West, Gilbert, Phoenix being one example. It runs to 56mbits and will support 4 TVs (loads of channels), phone integrated to the TV (caller ID on the TV screen) and 1meg up and down for PCs.

    IDSL can be thought of as modern ISDN. The technology for IDSL is different than DSL, and since it is not as mass-market, it is also more expensive. Your money is not paying for bandwidth, it is paying for equipment and installation that is not as frequently performed, and therefore costs more.

    To some extent, also, IDSL prices maybe higher because they can be: IDSL is often the only choice if you are sufficiently far away from your CO.

    By ua549 December 01, 2000, 04:31 PM

    If you have a single PC, you don't need a router to connect to any kind of DSL service. If you have a network at home, the hardware you need depends upon the operating system you are using. For example, Win2k Server has both NAT and routing built in. All you have to do is set it up. You can use ICS in Win98 and WinMe to do achieve similar results through port sharing on the box that is connected to the DSL interface box. If you want to go with a hardware solution, you can buy a router/switch for a few bucks, plug 'n play.


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