Instruction Manual
Section 5 FAQ and Troubleshooting
How fast is ADSL?
Up to 8 Mbps downstream and up to 832Kbps upstream, depending upon the Internet Access Plan
subscribed for your ISP and line
condition.
What are the differences between ADSL & ISDN?
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. How
ever, 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.
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 band-
width is shared among all users on a line, and will therefore vary, perhaps dramatically, as more users in a neighbor-
hood 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.
Can I use the ADSL modem to do faxing?
No, you cant. P20