Chapter 5. Configuration Menu

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

 

 

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TSU 120 User Manual

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ADTRAN user manual DBU Configuration Menu Items TSU 120e only, Backup Mode, Backup on, Pattrn Verify, Backup Delay