Configuration Commands80-10100000-09 4–194.13 Backup Initiation and AnsweringConfigurationThe KBU 64s at each end of a Kilostream link will detect line failureindependently. It is also possible that the leased circuit fails in onedirection only.If Kilostream backup operation is to be fully automatic, one unit mustinitiate the backup link (backup auto) and the other must answer it(answer auto).To achieve the above both units need to have BACKUP and ANSWERset to AUTO, and in order to prevent call collision each will have theDELAY BACKUP timer set to a different value.As with all commands that alter the configuration, backup initiation andanswering configuration commands can only be issued after a ‘SET’command.The configuration settings for these commands have a direct effect onthe backup operation of the KBU 64, dictating whether each operationoccurs automatically or manually (manual being the default setting in allcases).4.13.1 Storing Backup Telephone NumbersThe telephone number of the remote KBU 64 which will be used duringbackup of the Kilostream link is held in the ‘STORE’ parameter of yourconfiguration.Up to 99 telephone numbers (for each channel) can be stored in thedirectory for backup use. During an auto backup, the number configuredin 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 aconnection is established (see section 4.14 for a full explanation of thefunctionality of alternate redialling, and details of the configurationrequirements).If manual backup is initiated (see section 6) any one of the telephonenumbers within the 99 directory locations can be used for the backupcall.
