Verilink DIU 2131 (880-502765-001) Product Manual - Manual (Page 23)

Diagnostics and Troubleshooting
Verilink User Manual 4-3
Monitoring Test
Pattern Errors
The DIU 2131 has bidirectional loopbacks that can be used with
test patterns.
The T (Block Error Counter) command generates and monitors a
DIU test pattern for errors. The monitoring is “real time,” not
historical. The count is updated every second.
The DIU test runs on user-selected time slots. It tests the integrity
of the T1 link between two DIUs.
The test can only be run in two ways:
A. Into a far-end loopback (bidirectional DIU loopback)
B. Against another DIU running its test pattern with no loopback set
This test is performed after setting a far-end loopback, using the F
command.
To monitor the block error counter:
1. Type T and the port number in the prompt line of the DIU
2131 Configuration/Diagnostic Menu .
2. Press E NTER
. The following line displays.
3. Press
E NTER
to stop the test and exit the screen.
4. The screen is updated every second to display the sum of all
errors detected from the start of the test. Count information is
not stored.
DIU DIU DIU DIU
x
x
BEC BEC
BEC
(a) (b)
[1, 2] DIU 2131 > T1
Port 1, Block Error Count 23867, (STOP) >
The entire line will blink once every
second. The error counter is refreshed
each time.