Troubleshooting guide

Section 5, User Interface Guide - UIG-535, STS-1 Loopbacks
61186003L1-1D 5-103
Figure 5-74. Digital Loopback
STS-1
MAPPER
T1/E1 LIU
(1 of 28)
T1/E1 LIU
(28 of 28)
STS-1
LIU
CODEC
(1 of 28)
CODEC
(28 of 28)