AT&T MERLIN LEGEND Release 3.0 Installation Manual page 449

100D Module Problems
Error Events
In addition to checking the error logs, the 100D module requires that you
check the error events specific to the 100D module. See "Error Events, " later
in this chapter, for details.
CSU Loopback Test
The Channel Service Unit (CSU) Loopback Test verifies that the
communication path between the following CSUs, 551 T1, ESF T1, or the
®
ACCULINK 3150, and the 100D module is operational.
Summary
Console Procedure
PC Procedure
Appropriate Modules
Time Estimate
EQ IN and EQ OUT
(551 T1 CSU)
DTE LOOPBACK
(ESF T1 CSU)
LINE LOOPBACK
(ACCULINK 3150
CSU)
Busy-Out or Reset
Menu → Maintenance → Slot → Dial the slot no. →
Enter → CSU-1pbk
(F6) → (F2) → Type the slot no. → (F10) → (F4)
This test can be run only on 100D modules.
Approximately 2 minutes
For the 551 T1 CSU only, connect a patch cord
from the CSU EQ IN jack to the CSU EQ OUT jack.
Details are provided below.
For the ESF T1 CSU only, flip the DTE LOOPBACK
switch on the front paneI to the up position to
activate the Ioopback. Details are provided below.
For the ACCULINK 3150 only, select front panel
Line Loopback command. Details are provided
below.
Prior to beginning the test, busy-out the 100D
module. Both
Busy-out
menu, which you can access by doing the following
from the console:
Menu → Maintenance → Slot.
See "Busy-Out and Reset," earlier in this chapter,
for additional information.
and are in the Slot
Reset
Control Unit Problems 4-71