ZyXEL Communications AAM1212, User Manual

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AAM1212 User’s Guide
Chapter 8 ADSL Port Setup 105
The following table describes the fields in this screen.
Table 22 Line Rate Information
LABEL DESCRIPTION
Line Performance Click Line Performance to display an ADSL port’s line performance counters.
Line Data Click Line Data to display an ADSL port’s line bit allocation.
Port Use this drop-down list box to select a port for which you wish to view information.
Refresh Click Refresh to display updated information.
Port Name This field displays the name of the ADSL port.
The rate fields display the transmission rates. “Line Down” indicates that the ADSL port is not
connected to a subscriber.
Down/up Stream
Rate
These are the rates (in Kbps) at which the port has been sending and receiving
data.
Down/up Stream
Noise Margin
These are the DSL line’s downstream and upstream noise margins. Measured in
decibels (dB).
Down/up Stream
Attenuation
These are the reductions in amplitude of the downstream and upstream DSL
signals. Measured in decibels (dB).
Down/up Stream
Attainable Rate
These are the highest theoretically possible transfer rates (in Kbps) at which the
port could send and receive data.
Service Mode This field displays the ADSL standard that the port is using: G.dmt, G.lite or ANSI
T1.413 issue 2, ADSL2, ADSL2+.
Trellis Encoding This field displays whether Trellis encoding is turned on or off. Trellis encoding
helps to reduce the noise in ADSL transmissions. Trellis may reduce throughput
but it makes the connection more stable.
a
a. At the time of writing, the AAM always uses Trellis coding.
Down Stream
Interleave Delay
This field displays the number of milliseconds of interleave delay for downstream
transmissions.
Up Stream
Interleave Delay
This field displays the number of milliseconds of interleave delay for upstream
transmissions.
Down Stream
Output Power
This field displays the amount of power that this port is using to transmit to the
subscriber’s ADSL modem or router. The total output power of the transceiver
varies with the length and line quality. The farther away the subscriber’s ADSL
modem or router is or the more interference there is on the line, the more power is
needed.
Info The Info Atur fields show data acquired from the ATUR (ADSL Termination Unit –
Remote), in this case the subscriber’s ADSL modem or router, during negotiation/
provisioning message interchanges. This information can help in identifying the
subscriber’s ADSL modem or router.
The
Info Atuc fields show data acquired from the ATUC (ADSL Termination Unit –
Central), in this case AAM, during negotiation/provisioning message interchanges.
The vendor ID, vendor version number and product serial number are obtained
from vendor ID fields (see ITU-T G.994.1) or R-MSGS1 (see T1.413).