DT Etherlink IV
User Manual
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Severely Errored Seconds Ratio (SESR)
– The ratio of SES to the total number of error-free
seconds in available time during a fixed measurement interval.
Background Block Error ratio (BBER)
– The ratio of BBE to the total number of error-free seconds in
available time during a fixed measurement interval.
Available time
– The period when measurements of the parameters are possible.
Unavailable time
– The period when the measurements of the parameters are impossible.
4.6.3.3
<G826 Е1> Command
This command displays the ITU-T G.826 error performance parameters on the E1 side.
If for the E1 interfaces the CRC4 mode is on the following parameters are shown:
CO_PM>G826 E1
--------------------------------------------------------------------------------
G.826 : 1-CRC4 1-E-Bit 2-CRC4 2-E-Bit 3-CRC4 3-E-Bit 4-CRC4 4-E-Bit
--------------------------------------------------------------------------------
EB : 00000000 00000000 00000000 00000000 00000000 00000000 00000003 00000002
ES : 00000000 00000000 00000000 00000000 00000000 00000000 00000001 00000001
SES : 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
BBE : 00000000 00000000 00000000 00000000 00000000 00000000 00000003 00000002
ESR [%]: 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01
SESR[%]: 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
BBER[%]: 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AT : 00000000 00000000 00005412 00005412 00000000 00000000 00005411 00005411
UAT : 00005452 00005452 00000040 00000040 00005452 00005452 00000041 00000041
--------------------------------------------------------------------------------
CO_PM>
If for the E1 interfaces the CRC4 mode is off the following parameters are shown:
CO_PM>G826 E1
--------------------------------------------------------------------------------
G.826 : 1-FAS 2-FAS 3-FAS 4-FAS
--------------------------------------------------------------------------------
EB : 00000000 00000000 00000000 00000003
ES : 00000000 00000000 00000000 00000001
SES : 00000000 00000000 00000000 00000000
BBE : 00000000 00000000 00000000 00000003
ESR [%]: 0.00 0.00 0.00 0.01
SESR[%]: 0.00 0.00 0.00 0.00
BBER[%]: 0.00 0.00 0.00 0.00
AT : 00000000 00005557 00000000 00005556
UAT : 00005609 00000052 00005609 00000053
--------------------------------------------------------------------------------
CO_PM>
If for the E1 interfaces the ITU-T G.704 framed mode is off, the following parameters are shown:
CO_01_PM>G826 E1
--------------------------------------------------------------------------------
G.826 : 1 2 3 4
--------------------------------------------------------------------------------
EB :
ES :
SES :
BBE :
ESR [%]:
SESR[%]:
BBER[%]:
AT : 00000000 00005557 00000000 00005556
UAT : 00005681 00000124 00005681 00000125
--------------------------------------------------------------------------------
CO_PM>
Option: С – update the table continuously.
Digits 1, 2, 3 and 4 in the first row of the table indicate 1
st
, 2
nd
, 3
rd
and 4
th
E1 interfaces.
CRC4
– Cyclic redundancy check indicate errored submultiframes received on the E1 side.
E-Bit
– CRC4-indication bit denoting received errored submultiframes received on the E1 side.
FAS
– Errored frame alignment signal received on the E1 side.
Errored Block (EB)
– A block in which one or more bits are in error.
