ADTRAN 1200270L1, Manual

Page: 97 / 132

Chapter 11. Testing and Troubleshooting
61200270L1-20 DSU III ARdc User Manual 11-19
Figure 11-15. Initiating a Self Test
Interpreting Test Results
Once S
ELF
T
EST
is activated, the LEDs cycle on and off as the system runs
the self test. A pass or fail status will be displayed on the LCD along with
a checksum indicating the current firmware revision.
REMOTE UNIT DIAGNOSTICS
A remote DSU III ARdc can perform seven different tests; see Table 11-5.
The R
EMOTE
U
NIT
submenu allows a remotely installed DSU to be placed
into loopback. There are six test patterns to choose from, or Data from the
DTE may be selected.
1=DTE & LOOP (LL)
2=LOOP ONLY (RT)
3=DTE ONLY
4=DTE WITH TP
1=LOCAL UNIT 5=TEST PATTERN
2=TEST 6=SELF TEST
2=REMOTE UNIT
Table 11-5. Remote Tests and AT Commands
Front
Panel
AT
Command
Description
1=2047 PATTERN _T0&T7 Standard 2047 random data pattern
2=511 PATTERN _T1&T7 Standard 511 random data pattern
3=STRESS PTRN #1 _T2&T7 DDS Stress Pattern #1
4=STRESS PTRN #2 _T3&T7 DDS Stress Pattern #2
5=STRESS PTRN #3 _T4&T7 DDS Stress Pattern #3
6=STRESS PTRN #4 _T5&T7 DDS Stress Pattern #4
7=DATA FROM DTE &T6 Data from DTE