- 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
- 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 &
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
- 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
- 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
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.