Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 59)

T1 Dial Backup Option Overview
Verilink 5-11
Manually
Controlling Dial
Backup
If you do not want the automatic backup feature to take effect, you
can manually disable the automatic mode (see Configuring Modes
for Dial Backup). You can then manually force Port 1 to connect to
Port 2 (dial backup mode), as shown in this section. You may want
to do this for diagnostic purposes. (See Managing Alarms and
Testing.)
In the AM2000, these activities are located in the online Test
Activity menu as shown in Figure 5-2.
Table 5-2 Test Activity Menu
The dial backup options include:
Activate backup connection
This breaks the connection to the T1 backplane bus and
switches Port 1 to Port 2. (See Figure 2.)
Deactivate backup connection
This option breaks the connection to the backup port and re-
establishes the connection to the T1 backplane. (See Figure
2.)
Testing Before or
After a T1 Circuit
Failure
When you have the backup circuit activated, you can test it by
selecting items A and B on the Select Test Activity menu shown in
Figure 5-2. Send Test Pattern sends a the loop code or test pattern
to the far-end to verify that a dedicated circuit is operating
satisfactorily.
Table 2
Dial Backup Alarm Codes for
DIU 2 130/DB
Alarm
Code Alarm Description
853 Backup connection activated alarm
854 Backup connection activated alarm cleared
855 Backup connection failed alarm
/ DBU