Case 6401 - Page 15

Case Communications 6401 Rugged ADSL Router Manual – Rev 1.5
SECTION 3- DEVICE INFORMATION Page 3.5
When there is no user traffic, the ADSL links can switch from a high power mode to a low power
mode. If there is no user data for a long period of time, the link can switch further to a very low
power, idle state. Once there is user data, the link will quickly return to the full power state.
The recommendations define three power states: L0, L2, and L3.
State
Name
Description
L0
Full On
This is the normal operating state. The system must be in this state in order to achieve
the maximum data rate.
L2
Low
Power
The ADSL link is active, but a low-power signal conveying background data is sent from
the CO unit to the remote unit. Normal data is transmitted from the remote unit to the CO
unit. This state is entered when there is little data to be transmitted. The reduced rate
reduces the power consumption.
L3
Idle
When there is no user data to be transmitted, the system may enter the idle state. In this
state there is no signal transmitted on the link. The unit may be without power.
SNR Margin
SNR Margin could be thought of as a "buffer zone" which is there to protect your connection against
normal SNR fluctuations that can and do occur on a daily basis.
Once your SNR Margin starts to drop below 10dB on a traditional fixed rate line then you can
experience problems.
Attenuation (0.1 dB):
Line attenuation is in relation to the "loop loss" on your line. The lower this figure the better, and the
better chance you have of getting the faster speeds.
Attenuation is a term used to describe the reduction of the adsl signal strength that occurs on the
copper pair over distance and is measured in dB decibels. The further you are away from the
exchange the higher your attenuation figure will be as the signal loss increases.
Output Power (0.1 dBm):
This is the upstream power used by your 6401 Rugged ADSL router on the copper circuit.
Super Frames: Total number of super frames.
Super Frame Errors: Number of super frames received with errors.
RS Words: Total number of Reed-Solomon code errors.
RS Correctable Errors: Total number of RS with correctable errors.
RS Uncorrectable Errors: Total number of RS words with uncorrectable errors.
HEC Errors: Total number of Header Error Checksum errors.
OCD Errors: Total number of out-of-cell Delineation errors.
LCD Errors: Total number of Loss of Cell Delineation.
Total Cells: Total number of cells.
Data Cells: Total number of data cells.
Bit Errors: Total number of bit errors.
Total ES: Total Number of Errored Seconds.
Total SES: Total Number of Severely Errored Seconds.
Total UAS: Total Number of Unavailable Seconds.
xDSL BER Test: Click this button to start a bit Error Rate Test.
Reset Statistics: Click this button to reset the statistics.