Fast Mode - ZyXEL Communications MSC1000G User Manual

Chapter 11 Profile Screens

11.2.1 Fast Mode

Fast mode means no interleaving takes place and transmission is faster (a "fast channel"). This
would be suitable if you have a good line where little error correction is necessary.
11.3 Configured Versus Actual ADSL Rates
You configure the maximum rate of an individual ADSL port by modifying its profile (see the set
profile command) or assigning the port to a different profile (see the set port command). However,
due to noise and other factors on the line, the actual rate may not reach the maximum that you
specify.
Even though you can specify arbitrary numbers in the set profile command, the actual rate is
always a multiple of 32 Kbps for the G.dmt, ANSI T1.413 and G.lite ADSL standards or a multiple of
4 Kbps for the ADSL2 and ADSL2+ standards.
With the G.dmt, ANSI T1.413 and G.lite ADSL standards, if you enter a rate that is not a multiple of
32 Kbps, the actual rate will be the next lower multiple of 32 Kbps. For instance, if you specify 60
Kbps for a port, the actual rate for that port will not exceed 32 Kbps, and if you specify 66 Kbps, the
actual rate will not be over 64 Kbps.
With the ADSL2 and ADSL2+ standards, if you enter a rate that is not a multiple of 4 Kbps, the
actual rate will be the next lower multiple of 4 Kbps. For instance, if you specify 67 Kbps for a port,
the actual rate for that port will not exceed 64 Kbps, and if you specify 69 Kbps, the actual rate will
not be over 68 Kbps.
Note that when you configure an ADSL port, the upstream rate must be less than or equal to the
downstream rate. Note also that the list port command displays the configured parameters of the
ADSL port, while the show port command displays the actual rates.
11.4 ADSL Profile Screen
Click Profile > ADSL in the navigation panel to open the following screen. Use this screen to
configure ADSL profiles. Later you can use the ADSL profiles to configure ADSL ports in the ADSL
Port Setup screens.
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Management Switch Card User's Guide