Metallic Diagnostics; Figure 6-14. Metallic Diagnostics Loopback Test - ADTRAN 1200287L1 User Manual

Metallic Diagnostics

A
to the local loop side. The end effect of this test is a loopback of all
VT/Ports after being fully multiplexed and de-multiplexed to and
from the STS-1 and passed through both directions of the LIU.
During this test, the incoming STS-1 is disconnected from the
STS-1 receiver and the outgoing STS-1 signal is substituted in its
place. See Figure 6-14 for an illustration of this test.
STS-1
61200659L1-1
M D
ETALLIC IAGNOSTIC
STS-1
MAPPER
LIU

Figure 6-14. Metallic Diagnostics Loopback Test

MX2800 STS-1 User Manual
loopback test loops the entire STS-1 back
CODEC T1/E1 LIU
(1 of 28) (1 of 28)
CODEC T1/E1 LIU
(28 of 28) (28 of 28)
Chapter 6. Diagnostics
6-11