ADTRAN TSU 120e - Manual (Page 98)

Chapter 7. Test Menu
7-10 TSU 120 User Manual 61202129L1-1
DBU Loopback (TSU 120e only)
DBU Test (TSU 120e only)
This selection is used to force a backup to occur even if a
backup condition does not exist.
DBU DATA/CNTRL (TSU 120e only)
Allows status of DCD and RI to be monitored while the
INTERFACE TST is on. If the dial-up network is correctly config-
ured and dialed up, there should be an asterisk (*) over DCD.
DBU TST RESULT (TSU 120e only)
When an interface test is active, this screen will show the total
number of
DATA BLOCKS received and the number of blocks
with errors.
Port Test Menu Items for 0.2 DSX-1
Loopback
Loopback activates the loopback function on the base DSX-1
interface. The available loopbacks are Port Loopback (towards
the NI) and Line Loopback (towards the PBX or other terminal
equipment).
Cancel Tests
Use this menu selection to deactivate all active tests, including
tests on option modules.
ON Initiates a loopback from the DBU towards the
external DCE
OFF Terminates the loopback test
Test Name What it does...
TEST OFF Turns off DBU tests
FORCED
BACKUP
Forces a backup regardless of time-of-day
lockouts or network conditions
INTERFACE
TEST
Causes the external DCE to dial its stored
number. After the connection is established,
the DBU sends a test pattern to verify the
backup network. This test does not disrupt
data or the primary network.