ADTRAN TSU 120e - Manual (Page 79)

Chapter 5. Configuration Menu
61202129L1-1 TSU 120 User Manual 5-21
DBU Configuration Menu Items (TSU 120e only)
Menu Items Description
BACKUP MODE In a backup condition, both ends of the circuit must
detect backup conditions before backup is acti-
vated. One DBU is set to
ORIGINATE and the other to
ANSWER . Upon a network failure, only the Origi-
nate DBU initiates backup by dialing the Answer
end. Once called, the
Answer DBU goes into backup
mode only if a backup condition is detected. This is
ideal for controlling where calls originate.
Choices: Disable, Originate, Answer
BACKUP ON Selects the conditions that cause the Nx/DBU to
initiate Backup.
NET FAIL :
Backup occurs on RED ALARM , YELLOW ALARM , BLUE
ALARM , and LOS .
NET / DATA FAIL :
Backup occurs on the same conditions as NET FAIL ,
plus loss of data transitions on the data the Nx56/
64 receives from the network.
PATTRN VERIFY Selects whether or not the DBU will use its pattern
generator and receiver to authenticate backup
attempts. When the local and remote units are both
Nx/DBUs, set to
ENABLE ; otherwise set to DISABLE .
Choices: Enable, Disable
BACKUP DELAY Selects the time allowed to elapse between the net-
work going into alarm or no data transmissions
and the backup beginning.
Choices: 1 sec, 3 sec, 10 sec, 30 sec, 1 min, 5 min,
10 min