Verification, Verification without an h2tu-r remote unit, Verification with an h2tu-r remote unit – ADC H2TU-C-231 User Manual
Page 16: Erification
Installation
LTPH-UM-1109-01, Issue 1
8
January 9, 2002
H2TU-C-231 List 2
V
ERIFICATION
Once the H2TU-C-231 is installed, verify that it is operating properly. To do this, monitor the following:
•
Status LED (see
)
•
Status messages reported by the front-panel display (see
Verification without an H2TU-R Remote Unit
If there is no H2TU-R remote unit installed:
1
Verify that the H2TU-C powers up. The front-panel display illuminates and reports status messages. (See
for a list of messages.)
2
Verify that the H2TU-C attempts to communicate with a remote unit (status LED flashes red). Even if a
remote unit is not present, the following events should occur:
a
The front-panel display reports various four-character status messages.
b
The H2TU-C again attempts communication until a remote unit is detected.
Verification with an H2TU-R Remote Unit
If an H2TU-R remote unit has been installed:
1
Verify that the H2TU-C powers up. (The front-panel display illuminates and reports various status messages.)
2
Verify that the H2TU-C attempts to communicate with the remote unit (status LED flashes red). One of the
following occurs:
a
If the remote unit is successfully identified and the HDSL2 loop synchronizes, the H2TU-C status LED
lights a steady green. The H2TU-C reports normal margin messages on the front-panel display.
b
If the remote unit is not identified, the H2TU-C reports four-character status messages. The H2TU-C
attempts communication again and reports four-character status messages. The H2TU-C repeats this
cycle until a remote unit is detected.
3
Verify that a valid DS1 signal has been applied to the H2TU-C and the H2TU-R.
a
If no DS1 signal is being applied to either the H2TU-C or the H2TU-R inputs, then the appropriate DS1
alarms (LLOS or RLOS) display on the front panel and the status LED flashes red.
b
If a valid DS1 signal is being supplied to the H2TU-C and H2TU-R, then DS1 alarm indications should
be absent and the status LED should be a steady green.