Table 13-1. Messages From The Dsu/Csu - ADTRAN DSU IV ESP User Manual

The S
messages. Pressing
be selected.
Message
Loop is Good local loop signal
Normal being received from
the telco
Open Loop Unit not receiving a sig-
nal from the telco
No RX Signal Unit detects sealing
current but no data sig-
nal from telco
OOS/OOF Unit detects an out-of-
From Net service or out-of-frame
condition from the telco
Check Telco Transmit/receive pair
LIne reversal detected
Test from Telco activated a loop-
Telco back to test the DDS
circuit
61204011L1-1
menu must be selected in order for the unit to display status
TATUS
Quick

Table 13-1. Messages from the DSU/CSU

Meaning Probable Cause
Indicates good local
loop
Bad telco cable from
the DSU to telco jack
or bad circuit to telco
Bad conductor in tel-
co cable from DSU to
telco jack or bad cir-
cuit to telco
Telco is having prob-
lems with DDS circuit
or remote unit is
turned off or discon-
nected
Telco wall jack wired
incorrectly
Telco is testing circuit Wait until test is com-
DSU IV ESP User Manual
Chapter 13. Testing and Troubleshooting
returns to the Main menu, where S
No action required; unit
properly connected to
telco circuit
Replace telco cable
from DSU to wall jack. If
a problem persists,
contact telco provider
Replace telco cable
from DSU to wall jack. If
a problem persists,
contact telco provider
Check remote unit.
Contact telco service
provider
Switch wire pairs in wall
jack or contact telco
service provider
plete or contact telco
service provider
can
TATUS
Action
13-5