Sony DT360 - Manual (Page 25)

OUTGOING CALLS
23
BusinessPhone 250 / BusinessPhone 50
Portable DT310 / DT360 / DT368
AUTOMATIC
CALL-BACK
You call an extension and receive busy tone or get no answer.
Press and go ”on hook”
Verification tone. You are called back if the extension finishes
the ongoing call or the next time the extension finishes a new
call. You have to answer within eight seconds otherwise the
call-back service is cancelled.
BUSY EXTENSION You call an extension and receive busy tone.
Camp-on You can notify a busy extension of your call by a muted
ringing call (if this function is allowed).
Press to camp on
Keep the handset off hook. When the called extension
replaces the handset, it will be called automatically.
Note: If you receive the busy tone again, the desired extension
does not allow camp-on.
Intrusion You can intrude on an ongoing call on a busy extension
(if this function is allowed).
Press to intrude
Intrusion tone is heard and a three-party call is established.
When the called extension replaces the handset and you keep
off hook, the called extension will be recalled automatically.
Note: If you still hear the busy tone, then your extension does not
have the authority to intrude or the desired extension is protected
against intrusion.