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Frequently Asked Questions---ADSL
  • Q01: What is xDSL?

    xDSL is a generic abbreviation for the many flavors of DSL or Digital Subscriber Line technology. DSL refers to the technology used between a customer's premises and the telephone company, enabling more bandwidth over the already installed copper cabling than users have traditionally had. The xDSL modem is a technology that transforms ordinary phone lines into high-speed digital lines for ultra fast Internet access. DSL modem also enables access to corporate networks for telecommuters, as well as exciting new interactive multimedia applications such as multiplayer gamming, video on demand, video-conferencing and video catalogs.

  • Q02: What is Asymmetric?

    Asymmetric Digital Subscriber Line (ADSL) is the most popular form of xDSL technology. The key to ADSL is that the upstream and downstream bandwidth is asymmetric, or uneven. In practice, the bandwidth from the provider to the user (downstream) will be the higher speed path. This is in part due to the limitation of the telephone cabling system and the desire to accommodate the typical Internet usage pattern where the majority of data is being sent to the user (programs, graphics, sounds and video) with minimal upload capacity required (keystrokes and mouse clicks). Downstream speeds typically range from 768 Kb/s to 9 Mb/s Upstream speeds typically range from 64Kb/s to 1.5Mb/s. ADSL usually has a downstream rate that is approximately 10 times faster that the upstream speed, but some ADSL offerings today deliver the same speed bi-directional, e.g. 384kbps bi-directional.

  • Q03: How does ADSL work?

    ADSL modems use digital coding techniques to squeeze up to 99% more capacity out of a phone line without interfering with your regular phone services. That means you can simultaneously talking over the phone or sending a fax – while surfing the World Wide Web.

  • Q04: How fast is ADSL?

    Up to 8 Mbps downstream and up to 1.5 Mbps upstream, depending upon line length , loop and line condition.

  • Q05: What are the differences between ADSL & ISDN?

    The two services are NOT the same. ISDN provides two voice channels or a 128 Kbps data channel while ADSL is predominantly a data pipe providing an asymmetrical bandwidth of up to 8 Mbps downstream and 1 Mbps upstream under good conditions. However, an ADSL access network will be an overlay network and therefore will not require the expensive and time-consuming switch upgrades that held ISDN back for so long. If ADSL service prices resemble ISDN service prices, then one would expect ADSL to be favored for Internet and video application.

  • Q06: How does ADSL compare to cable modem?

    ADSL provides a dedicated service over a single telephone line; cable modems offer a dedicated service over a shared media. While cable modems have a greater downstream bandwidth capabilities (up to 30 Mbps), that bandwidth is shared among all users on a line, and will therefore vary, perhaps dramatically, as more users in a neighborhood get online at the same time.
    Cable modem upstream traffic will in many cases be slower that ADSL, either because the particular cable modem is inherently slower, or because of the rate reductions caused by contention for upstream bandwidth slots.

  • Q07: Can I use the ADSL modem to do faxing?

    No, you can't. As the ADSL modem is not interfering with the regular phone frequencies. As such, it is not seen, nor cannot see these frequencies. As a fax machine uses the regular frequencies, an ADSL modem cannot fax on the data frequencies used for the ADSL-connection. However, though you are using the ADSL modem, you can still use the phone or fax machine/ fax modem at the same time while you are connecting to Internet.

  • Q08: What does a Micro filter do and when do I need one?

    A micro filter uses a low pass filter to separate the low-end frequencies of the telephone audio spectrum from the higher frequencies of the xDSL signals. The micro filter should be a passive device, not requiring power so that "life-line" voice service can be provided as has been in the past. This micro filter allows for the traditional voice service that consumers are accustomed to.

  • Q9: Can I use my 28.8K/56K(dial-up) modem with my xDSL line?

    Yes, however, you must install a micro filter to separate the ADSL modem to the dial-up modem to remove the noise on the ADSL phone line.

  • Q10: How can I get a better and higher upstream & downstream speed?

    The better line quality and shorter distance from your area to CO (Centre Office) will help to bring you a faster modem speed. Anyway, the range for the ADSL modem speed is 1.5~8Mbps for downstream; while 640Kbps ~ 1.5Mbps for upstream.

  • Q11: What is the minimum system requirement for the broadband service?

    Intel Pentium 233Mhz or AMD K6-2 and above or Intel Celeron, Microsoft ® Windows ® 98/ ME/ 2000, 64MB RAM, 20MB of hard disk space, an available USB port or USB Hub(Intel USB Chipset recommended) , CD-ROM Drive for driver and software installation & ADSL service subscribed with an ADSL provider.

  • Q12: How is the warranty period for the PROLiNK ADSL USB Modem (Hurricane Series)

    1-year carry-in warranty on both parts & service

  • Q13: Is the PROLiNK Hurricane series ADSL modem a full rate modem?

  • Q14: Is there any lightening surge arrestor in-built in the PROLiNK Hurricane series ADSL modem?

  • Q15: How should I connect my ADSL modem & use the phone as usual?

    To connect the ADSL modem and use the phone as usual, please connect the ADSL modem to your PC’s USB port, then connect the phone line from wall-jack to the modem’s jack that labeled “line” then connect your phone line to one of the micro-filter, and connect the line from micro-filter to the modem’s jack that labeled “phone”

  • Q16: If I’m using the phone for normal tele-conversation, will that decrease my bandwidth or ADSL Internet access speed when downloading, and by roughly how much?

    As the voice communications over POTS (plain old telephone service) operates at frequencies below 4KHZ and the frequencies for the ADSL modem is higher than the one use for voice communication, the bandwidth available to ADSL will not be affected during your Internet access via ADSL modem, thus it will also not slow down or decrease your access speed.

  • Q17: What is the maximum speed?

    PROLiNK Hurricane series ADSL modem has excellent results for performance. We always make sure our modems comply with the ADSL-standards, which set the downstream speed up to 8 Mbps and the upstream speed up to 1 Mbps. Of course, the speed you currently have is limited by a number of factors. First of all, there’s your service subscription. You subscribe to a certain service for a fixed fee. This fee depends on the chosen speed and additional services.
    Then there’s the line length. Along this length, there are influencing factors such as lightning, physical copper quality, and finally, there’s the Internet. The ADSL-connection only runs between your modem and your phone company, but there are many bottlenecks in the worldwide Internet such as slow servers, bandwidth allocation.

  • Q18: I found my upload and download speed is not at 1MB and 8MB. Why? Anyway, which should be the reasonable speed we should have?

    Basically, the upload and download speed depend on your ISP. they also could be affected by the length, loop and condition of ADSL line.



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