Xdsl Performance Screen - ZyXEL Communications IES-1248-71 User Manual

Chapter 18 xDSL Line Data
Table 29 xDSL Line Rate Info (continued)
LABEL
Rate
Down/up Stream
Rate
Down/up Stream
Noise Margin
Down/up Stream
Attenuation
Down/up Stream
Attainable Rate
Info
Service Mode
Trellis Encoding
Down Stream
Interleave Delay
Up Stream
Interleave Delay
Down Stream
Output Power
Up Stream
Output Power
Info Atur
Info Atuc
A. At the time of writing, the IES-1248 always uses Trellis coding.

18.2 xDSL Performance Screen

These counters display line performance data that has been accumulated since the system
started. The definitions of near end/far end are always relative to the ATU-C (ADSL
Termination Unit-Central Office). ATU-C refers to downstream traffic from the IES-1248.
ATU-R (ADSL Termination Unit-Remote) refers to upstream traffic from the subscriber.
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DESCRIPTION
The rate fields display the transmission rates. "Line Down" indicates that the
ADSL port is not connected to a subscriber.
These are the rates (in Kbps) at which the port has been sending and receiving
data.
These are the DSL line's downstream and upstream noise margins. Measured
in decibels (dB).
These are the reductions in amplitude of the downstream and upstream DSL
signals. Measured in decibels (dB).
These are the highest theoretically possible transfer rates (in Kbps) at which the
port could send and receive data.
This field displays the ADSL standard that the port is using. The IES-1248-71/
71A uses G.dmt, G.lite, ANSI T1.413 issue 2, ADSL2, or ADSL2+. The IES-
1248-73 uses G.dmt Annex B, ETSI, ADSL2, or ADSL2+.
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.
This field displays the number of milliseconds of interleave delay for
downstream transmissions.
This field displays the number of milliseconds of interleave delay for upstream
transmissions.
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.
This field displays the amount of power that the subscriber's ADSL modem or
router is using to transmit to this port. 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.
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 IES-1248, 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).
A
IES-1248-71/73 User's Guide