User manual

Talkwire Operation
80-10100000-09 7–7
The originating unit, receiving a correct Talkwire sequence, sends a
CONNECT command to the remote unit, which is acknowledged by the
remote unit turning Talkwire OFF, and switching data traffic to the ISDN
line.
The originating KBU 64 seeing Talkwire turned OFF, connects its USER
port to the ISDN line, thus establishing a backup link. With the backup
link established, Talkwire is inhibited over the ISDN, and the KBU 64
attempts a Talkwire connection via the Kilostream Link.
Note: If the unit does not detect Talkwire due to poor data transfer, the
switch-over will be controlled by the settings for CONNECT, at each KBU
64.
With CONNECT set to AUTO, the remote KBU 64 will wait for the user
defined time-out to expire and then initiate the switch. With CONNECT
set to MAN, the ISDN call will be released, without switching the user to
the ISDN. The call is then usually re-dialled if the REDIAL parameter
allows.