Configuration Commands80-10100000-09 4–27Setting the RESTORE parameter to AUTO causes the KBU 64 to controlautomatic leased circuit verification and switching of the user back to theleased circuit.Once the KBU has detected and checked the Kilostream link to beoperational and safe for data it automatically re-connects the USER portto the Kilostream link, then hangs up the ISDN call. Data transfer nowoccurs over the Kilostream link. The Kilostream link then continues tobe monitored again.Automatic Talkwire restoration cannot occur if the SPEED parameter isset at 1K2bit/s or less.1> SET RESTORE xx[CR]wherexx is AUTO, MAN or WIN.MANual parameterWhen restore is set to MAN (the factory default), you will be informedwhen the Kilostream link is active once again, the ISDN call will not bedisconnected, and data will not revert to the Kilostream link untilmanually initiated (see section 6).WINdow parameterWhen restore is set to WIN, the KBU will release the ISDN call andrevert back to the digital leased circuit at the window end time, if theleased circuit is still detected as inactive at that time.RESTORE WIN can only be used with BACKUP set to WIN or MAN, andis invalid with BACKUP set to AUTO, due to an operational conflictwhich can be created.With RESTORE set to AUTO or WIN, the three factors that are used fordetermination of restoral are• successful talkwire (with talkwire set ON; see also section 4.15.11)and• presence of clocking (see section 4.15.9) and• presence of NTU (DSR or I signal) (see section 4.15.8)
