Instruction manual

CHAPTER 7. SYSTEM BACKUP FOR DEFINITY G1 AND G3i
CHAPTER 7. SYSTEM BACKUP FOR DEFINITY G1 AND G3i
DEFINlTY G1 and G3i systems use a tape-only backup system with or without a duplication
option. In case of a power failure of ten minutes or more, the system translations can be
restored using the data on the system or backup tape.
Save Translation
To ensure that the tape drive cassette tape contains the most recent copy of the translation data,
the system can automatically save the translation data onto the cassette tape every 24 hours.
Note: Automatic daily backup of the system translation data is controlled by an entry in the
system parameters that is defaulted to “y” (yes), which means the system will
automatically save the translation data every 24 hours.
If many translation data changes are made, it is recommended that the System Manager save
the translation data using the
save translation
command. This will save the new changes on the
cassette tape without having to wait for the next automatic daily translation backup. If extensive
changes, additions, or deletions are made, translations should be saved more frequently, alter-
nating the two tapes. Then, in case of a power outage, only the data entered since the last
“save” will be lost. See the “Tape Backup” sections of this chapter.
WARNING: It is recommended that “save translations” should be performed after
business hours so dial tone delays will not be encountered.
WARNING:
“save translations” should not be performed if any tape alarm conditions
occur or if this system is having problems.
Save and Restore Recorded Announcements
The recorded announcements in the system can be saved on the system cassette tape by enter-
ing the command
save announcements spe-active/spe-standby.
These commands should
only be used after business hours or when the system is operating during a low usage period.
The system takes about 45 minutes to one hour to transfer the recorded announcements from
the announcement board to the system tape. During this time period, the administration terminal
cannot be used to administer the system until the transfer is complete; however, all other
administration terminals, if provided, are allowed to perform administration procedures.
The recorded announcements
in the system can be restored back into the system memory from
the system tape by entering the command
restore announcement.
The system performs an
audit to make sure that the announcements on the announcement
board match the announce-
ments administered in the switch. If the restore announcements fails in a duplicated system
because of a tape or tape drive failure, the system will alarm the tape drive that didn’t restore and
switch to the standby Switch Processing Element (SPE) provided the standby is operational. The
restore announcements must then be re-entered on the new active SPE to restore the announce-
ments.
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