ZyXEL Communications ALC1224, User Manual

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ALC1224 User’s Guide
ADSL Port Commands 11-1
Chapter 11
ADSL Port Commands
This chapter describes some of the ADSL port standard shell commands that allow you to configure and
monitor the ADSL ports.
11.1 ADSL Overview
See the web configurator chapter on ADSL for background information about ADSL.
Command syntax and command examples are shown using Standard shell.
11.2 Configured Versus Actual Rate
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. If you enter a rate that is not a multiple of 32 Kbps, the actual rate will be the next lower
multiple of 32Kbps. 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 64Kbps.
Regardless of a profile’s configured upstream and downstream rates, the ALC1224 automatically limits the actual
rates for each individual port to the maximum speeds supported by the port’s ADSL operational mode. For
example, if you configure a profile with a maximum downstream rate of 25000 Kbps, and apply it to a port set to
use G.dmt, the ALC1224 automatically uses a maximum downstream rate of 8160 Kbps. This means that if you
configure a profile with very high rates, you can still use it with any port.
11.3 ADSL Port Commands
Use these commands to configure the line card’s ADSL ports.
11.3.1 Port Show Command
Syntax:
lcman port show <slot>
where
<slot>
=
The number of the slot where the ALC1224 is located.
This command shows the priority, PVID, modes and states of all ADSL ports. An example is shown next.