User manual

Configuration Commands
80-10100000-09 4–19
4.13 Backup Initiation and Answering
Configuration
The KBU 64s at each end of a Kilostream link will detect line failure
independently. It is also possible that the leased circuit fails in one
direction only.
If Kilostream backup operation is to be fully automatic, one unit must
initiate the backup link (backup auto) and the other must answer it
(answer auto).
To achieve the above both units need to have BACKUP and ANSWER
set to AUTO, and in order to prevent call collision each will have the
DELAY BACKUP timer set to a different value.
As with all commands that alter the configuration, backup initiation and
answering configuration commands can only be issued after a ‘SET’
command.
The configuration settings for these commands have a direct effect on
the backup operation of the KBU 64, dictating whether each operation
occurs automatically or manually (manual being the default setting in all
cases).
4.13.1 Storing Backup Telephone Numbers
The telephone number of the remote KBU 64 which will be used during
backup of the Kilostream link is held in the ‘STORE’ parameter of your
configuration.
Up to 99 telephone numbers (for each channel) can be stored in the
directory for backup use. During an auto backup, the number configured
in directory location 1 will be used to establish an ISDN call.
If this number is unavailable, the alternate redial facility will be invoked,
sequentially trying the telephone numbers within the directory until a
connection is established (see section 4.14 for a full explanation of the
functionality of alternate redialling, and details of the configuration
requirements).
If manual backup is initiated (see section 6) any one of the telephone
numbers within the 99 directory locations can be used for the backup
call.