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100D Module Problems
The ACCULINK 3160/3164 DSU/CSU is physically similar to the 3150 CSU
with programming on the front panel and menus appearing on the LCD
screen. For the preparation of specific tests, see the operator’s guide that
comes with the unit.
551 T1 Channel Service Unit
Figure 4-8.551 T1 CSU Loopback Connection
Control Unit Problems 4-73