Csu Loopback; Csu Loopback W/Bert - ADTRAN MX2800 User Manual

CSU Loopback

A CSU L
pattern (001001...) towards the T1 CSU attached to the selected T1
line for six seconds. After six seconds have elapsed, the pattern will
cease and incoming network traffic will be passed through to the
CSU device. If the CSU device responded to the CSU loop-up
pattern, it will return all data back towards the network. A loop-
down pattern (0000100001....) will be generated towards the CSU
for six seconds when D
When in CSU LOOPBACK, only the DATA MODE for the T1 under
test may be selected. Selecting any other option will result in an error
message being displayed.

CSU Loopback w/BERT

A CSU L
loop to the CSU using the standard 511 pseudo-random bit
sequence. When CSU L
will initiate a CSU loopback towards the CSU attached to the
selected T1 line similar to the CSU L
seconds after starting the CSU loop-up pattern, the MX2800 will
cease sending the CSU loop-up pattern and begin sending an
unframed 511 pattern towards the CSU. If the CSU device
responded to the CSU loop-up pattern, the MX2800 will check the
incoming pattern for errors. Additional menu items will appear to
show the state of pattern synchronization, error count, and a clear
error count option (see Figure 6-7). Selecting D
the transmission of the 511 pattern and start transmission of a loop-
down pattern as previously described.
When in CSU LOOPBACK w/BERT, only the DATA MODE for the
T1 under test may be selected. Selecting any other option will result in an
error message being displayed.
61200290L1-1
enables the MX2800 to generate a CSU loop-up
OOPBACK
M
ATA
w/BERT enables the MX2800 to test the local T1
OOPBACK
OOPBACK W
MX2800 User Manual
Chapter 6. Diagnostics
is selected.
ODE
/B is selected, the MX2800
ERT
test above. Six
OOPBACK
ATA
M will cease
ODE
6-5