ZyXEL Communications IES-1248-71, Руководство пользователя

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Chapter 55 ADSL Commands
IES-1248-71/73 User’s Guide
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55.2 Statistics ADSL Commands
Use these commands to display ADSL port statistics.
55.2.1 ADSL Show Command
Syntax:
ras> statistics adsl show [portlist]
where
This command displays ADSL port connection statistics including the status (V for enabled, -
for disabled), ADSL operational mode, upstream and downstream maximum rates, up time
and the number of errored seconds.
The following example displays connection statistics for ADSL port 1.
55.2.2 Linedata Command
Syntax:
ras> statistics adsl linedata <portlist>
where
This command shows the line bit allocation of an ADSL port.
Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into tones. This
command displays the number of bits transmitted for each tone. This can be used to determine
the quality of the connection, whether a given sub-carrier loop has sufficient margins to
support ADSL transmission rates, and possibly to determine whether certain specific types of
interference or line attenuation exist. See the ITU-T G.992.1 recommendation for more
information on DMT.
The better (or shorter) the line, the higher the number of bits transmitted for a DMT tone. The
maximum number of bits that can be transmitted per DMT tone is 15.
“upstream carrier load” displays the number of bits transmitted per DMT tone for the upstream
channel (from the subscriber’s DSL modem or router to the IES-1248).
“downstream carrier load” displays the number of bits received per DMT tone for the
downstream channel (from the IES-1248 to the subscriber’s DSL modem or router).
[portlist] =
You can specify a single ADSL port <1>, all ADSL ports <*> or
a list of ADSL ports <1,3,5>. You can also include a range of
ports <1,5,6~10>.
Figure 248 ADSL Show Command Example
ras> statistics adsl show 1
port status mode up/downstream up time error second(15M/24H)
---- ------ -------- ------------- -------------- ---------------------
1 V adsl2 512/ 9089 00000:00:04:59 15/15
<portlist> =
You can specify a single ADSL port <1>, all ADSL ports <*> or
a list of ADSL ports <1,3,5>. You can also include a range of
ports <1,5,6~10>.