User's Manual

Chapter 4 Device Information
P-663HN-51 User’s Guide
45
Link Power
State
This is the ADSL connection’s current power management mode.
SNR Margin
(dB)
This is the upstream and downstream Signal-to-Noise Ratio Margin (in
dB). A DMT
sub-carrier’s SNR is the ratio between the received signal power and the
received
noise power. The signal-to-noise ratio margin is the maximum that the
received noise
power could increase with the ZyXEL Device still being able to meet its
transmission targets.
Attenuation
(dB)
This is the downstream and upstream Line Attenuation (in dB).
Output Power
(dBm)
This field displays the amount of power being used to transmit to the
other end of the ADSL link. Output power varies with the line length and
quality. The longer the line is or the more interference there is on the
line, the more power is needed.
Attainable
Rate (Kbps)
These are the downstream and upstream highest theoretically possible
transfer rates (in Kbps).
Aggregate
Rate (Kbps)
These are the combined downstream and upstream rates (in Kbps) of the
two DSL ports.
DSL1 Rate
(Kbps)
These are the downstream and upstream rates (in Kbps) at which the
DSL1 port has been receiving and sending data.
DSL2 Rate
(Kbps)
These are the downstream and upstream rates (in Kbps) at which the
DSL2 port has been receiving and sending data.
Super Frames These are the downstream and upstream numbers of downstream and
upstream super frames.
Super Frame
Errors
These are the downstream and upstream numbers of errored super
frames sent and received.
RS Words These are the downstream and upstream numbers of Reed-Solomon
error correction words.
RS
Correctable
Errors
These are the downstream and upstream numbers of Reed-Solomon
errors.
RS
Uncorrectable
Errors
The number of downstream and upstream uncorrectable Reed-Solomon
errors.
HEC Errors These are the downstream and upstream numbers of Header Error
Control errors.
OCD Errors These are the downstream and upstream numbers of Out of Cell
Delineation errors.
LCD Errors The number of 1-second intervals since reset where loss of cell
delineation occurred.
Total Cells The total numbers of downstream and upstream ATM cells.
Data Cells The total numbers of downstream and upstream data cells.
Table 8 Device Info > Statistics > ADSL (continued)
LABEL DESCRIPTION