AT&T MERLIN LEGEND Release 3.0 Installation Manual page 454

Module Problems
100D
Figure 4-13. ACCULINK 3150 CSU DTE Loopback Command 3
Figure 4-14. ACCULINK 3150 CSU DTE Loopback Command 4
4-76 Control Unit Problems
L o o p b a c k :
∧
A b o r t
<
F 1
L o o p b a c k :
∧
LLB
<
F1
L L B P L B
F 3
F 2
PLB DLB
F3
F 2
>
>