View Performance Data - ADC HiGain HRU-402 Manual

Initializing the Maintenance Terminal Screens
To test the loopbacks:
1 Press the loopback control button on the remote unit front panel for at
least 5 seconds (see
2 Verify that the yellow HRU front panel LPBK LED turns on, indicating
that the HRU is in its digital (NREM) loopback state. Also verify, if
possible, that the HLU displays the message NREM, which also
indicates that the HRU-402 is in loopback.
3 Have the CO tester transmit a T1 test signal into the HLU to measure the
returned (looped) signal for errors.
4 If the above test fails, remove the remote unit from its loopback state by
again pressing the loopback control button for 5 seconds. Verify that the
LPBK LED goes off.
5 Have the CO tester send the HLU (4-in-7) in-band loop-up (NLOC) for
five seconds. Verify that the HLU displays the message NLOC
indicating that the HLU unit is in its network loopback state.
6 Repeat Step 3. If the test passes, the problem is in the cable pair or the
HRU-402. If it fails, the problem is at the CO.
7 When the HRU is looped back towards the CPE or Customer Local
Loopback (CLOC), the LPBK LED blinks yellow at one time per second.
8 When HiGain is in a Special Loopback (SPLB) ARMED state, the LPBK
LED blinks yellow at four times a second unless in NREM or CLOC
loopback.
V P
IEW ERFORMANCE
The View Performance Data screen shows the number of Error Seconds (ES)
and Unavailable Seconds (UAS) occurrences in 15-minute increments for a
24-hour period for the HLU and the HRU-402 and doublers if so configured.
This screen displays ES/UAS for the HLU and HRU-402 DS-1 signal, HDSL
Loop 1 and HDSL Loop 2 (non-doubler applications). For doubler
applications, the available View Performance Data screens displayed are
dependent upon the configuration (one, two or three doublers).
46
Figure 2 on page 7
D
ATA
December 8, 1998
for the location of this button).
150-402-111-02
HRU-402 List 1A