ADTRAN 1200063L1, Manual

Page: 36 / 137

Chapter 3. Operation
3-6 DSU III TDM User Manual 61200063L1-20
DSU and Network Status
Current DSU III TDM Status
Possible messages indicating the current status of the DSU III TDM include the
following:
Current DDS Network Status
For normal operation
LOOP IS NORMAL
should be displayed. The status of the
main telco line is indicated by one of the following messages:
Data Mode In data mode, the data set ready (SR) and request to
send (RTS) circuits are on, and the DSU III TDM is ready
to send data.
Unit in Test The DSU III TDM is currently in test mode. Use the
arrow keys to display the type of test being performed.
Answering Call The DSU III TDM detects an incoming call.
Check Telco
The transmit and receive (Tx/Rx) pairs of the loop
connection are reversed. The pairs should be
swapped for normal operation.
Going To DBU This message is displayed briefly when the unit is
switching from the dedicated service to dial backup
mode.
In Dial Backup The DSU is in dial backup mode.
LL Test From
Telco An LL Test has been initiated from the telco.
Loop is Normal The DSU is connected to the dedicated line.
OOS/OOF
The telco is transmitting an out of service code.
Open Loop The DDS physical connection has been broken.
Waiting for Call The DBU module is waiting for a call.