User manual

Configuration Commands
80-10100000-09 4–27
Setting the RESTORE parameter to AUTO causes the KBU 64 to control
automatic leased circuit verification and switching of the user back to the
leased circuit.
Once the KBU has detected and checked the Kilostream link to be
operational and safe for data it automatically re-connects the USER port
to the Kilostream link, then hangs up the ISDN call. Data transfer now
occurs over the Kilostream link. The Kilostream link then continues to
be monitored again.
Automatic Talkwire restoration cannot occur if the SPEED parameter is
set at 1K2bit/s or less.
1> SET RESTORE xx[CR]
where
xx is AUTO, MAN or WIN.
MANual parameter
When restore is set to MAN (the factory default), you will be informed
when the Kilostream link is active once again, the ISDN call will not be
disconnected, and data will not revert to the Kilostream link until
manually initiated (see section 6).
WINdow parameter
When restore is set to WIN, the KBU will release the ISDN call and
revert back to the digital leased circuit at the window end time, if the
leased circuit is still detected as inactive at that time.
RESTORE WIN can only be used with BACKUP set to WIN or MAN, and
is invalid with BACKUP set to AUTO, due to an operational conflict
which can be created.
With RESTORE set to AUTO or WIN, the three factors that are used for
determination 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)