Harris Constellation - OC3 Loopback Tests; OC3 Loopback; Figure 5-4: OC3 Loopback Test

Harris Corporation Constellation™
Loopback Testing 5-5
LOOPBACK TESTING
OC3 Loopback Tests
OC3 Loopback
Customer test equipment is required for this test. This test loops back the signal
from the local terminal to the far end. See
Figure 5-4 .
You need to access the hidden Control submenu to conduct the OC3 loopback
test.
From the Keypad, select
CONTROL > hidden menu (F1 + F3 or Ctrl B) > OC3 LPBK
Figure 5-4: OC3 loopback test
HLM-155
Hi Cap
Modem
ACU
Tra n s mi t t er
Assembly
HLM-155
ACU
Receiver
Assembly
Local Terminal
Remote Terminal
Customer
test set
Hi Cap
Modem
Wayside
Wayside
Tra n s mi t t er
Assembly
Receiver
Assembly
STM1/
STS3
or
OC3
STM1/
STS3
or
OC3