IES-1000 User’s Guide

24.3.5Enable Ports Command

Syntax:

192.168.1.1 adsl> enable ports

The enable ports command forcibly enables all ADSL ports.

The factory default of all ports is disabled. A port must be enabled before data transmission can occur. An enabled but disconnected ADSL port generates more heat than an operating port. To minimize heat generation and to enhance reliability, remember to disable a port when it is not in use.

24.3.6Linedata Command

Syntax:

192.168.1.1 adsl> linedata <port number>

where

<port number> = A port number, from 1 to 8.

The linedata 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 hexadecimal digits that indicate 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. Refer to 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.

“DS carrier load” displays the number of bits transmitted per DMT tone for the downstream channel (from the network module to the subscriber’s DSL modem or router).

“US carrier load” displays the number of bits received per DMT tone for the upstream channel (from the subscriber’s DSL modem or router to the network module).

The bit allocation contents are only valid when the link is up.

In the following example, the numbers of bits for two DMT tones display together. “44” displays for DMT tones 96 and 97. This means DMT tone 96 transmitted 4 bits and tone 97 transmitted 4 bits. Where neither of the two tones transmitted any bits, a single “0” is displayed (like tones 0 and 1 for example).

In the following example, the downstream channel is carried on tones 38 to 240 and the upstream channel is carried on tones 9 to 31 (space is left between the channels to avoid interference).

ADSL Commands

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