DT Etherlink IV
User Manual
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4.6.3 Performance Management Menu
After typing “1” in the main menu and pressing <enter>, the following message is displayed:
Performance management activated
Enter 'M' to return to MAIN, or 'H' for HELP information
CO_PM>
4.6.3.1 <H> Command
Type <H> and the monitor list all available commands in the performance sub-menu. If you type H
[command] you will get additional help on [command].
CO_PM>H
-------------------------------------------------------------------------------
Type 'H [command]' to get additional help on [command]
APPLY [ALL/GROUP] Apply changes to running configuration
G826 Display xDSL G.826 statistics
G826 C Display xDSL G.826 statistics continuously
G826 E1 Display E1 G.826 statistics
G826 E1 C Display E1 G.826 statistics continuously
ALLG826 N Display xDSL G.826 statistics for all link
RESETG826 Reset G.826 statistics
RESETALLG826 N Reset xDSL G.826 statistics for the whole link
LINKSTAT Display link status of all xDSL channels
ALARMLOG [N] Display the link alarm log
ALARMLOG C Clear the link alarm log
CONNECT [N:[1-13/R]] Establish connection to remote unit
LINK [NN] Establish local connection
LINKCLEAR Exit all local connections
M Return to Main Menu
H Show available commands
-------------------------------------------------------------------------------
CO_PM>
4.6.3.2 <G826> Command
The <G826> command displays the ITU-T G.826 performance parameters of the SHDSL line.
Depending on the number of SHDSL channels in the system, a table is displayed containing 1, 2 or
4 columns of data.
CO_PM>G826
--------------------------------------------------------------------------------
G.826 Error Performance : CRC6 1 CRC6 2 CRC6 3 CRC6 4
--------------------------------------------------------------------------------
Errored blocks : 0000000000 0000000000 0000000000 0000000000
Errored seconds : 0000000000 0000000000 0000000000 0000000000
Severely errored seconds : 0000000000 0000000000 0000000000 0000000000
Background block errors : 0000000000 0000000000 0000000000 0000000000
ESR [%] : 0.00 0.00 0.00 0.00
SESR [%] : 0.00 0.00 0.00 0.00
BBER [%] : 0.00 0.00 0.00 0.00
Available time : 0000005360 0000005360 0000005359 0000005359
Unavailable time : 0000000031 0000000031 0000000032 0000000032
-------------------------------------------------------------------------------
CO_PM>
Option: С – update the table continuously.
CRC6
– Cyclic redundancy check indicating errored blocks received on the SHDSL side.
Errored Block (EB)
– A block (transmission duration 6ms) in which one or more bits have errors.
Errored Seconds (ES)
– A second period with one or more errored blocks or at least one defect.
Severely Errored Seconds (SES)
– A one-second period, which contains more than 30% of errored
blocks per second from the total number of all received blocks. SES is a subset of ES.
Background Block Error (BBE)
– An errored block not occurring as a part of SES.
Errored Second Ratio (ESR)
– The ratio of ES to total seconds in available time during a fixed
measurement interval.
