System Functions and Features as of I7.9
422 Features
syd-0200/3.0 – I7.9 – 11.2009
8. 6. 17. 3 Wait until free
The Wait-until-free feature is a Callback-if-busy feature without the user who initi-
ates the call having to hang up. He stays on the phone and waits until the busy user
becomes free. The callback is triggered as soon as the called user has been free for
5 seconds. The connection is then set up automatically.
Fig. 206 Wait until free
Detailed Description
Tab. 263 Wait until free
User A must carry out the callback procedure with the handset off-hook and not via
the loudspeaker key.
"Wait until free" works only with cordless terminals.
Suffix dialling procedures
Tab. 264 Wait until free: Procedures
Interface
Operating sequence / signalling on the termi-
nal
Scope
A • Once the callback procedure has been exe-
cuted, A obtains the acknowledgement tone.
• As soon as user B is free, A obtains the ring-back
tone.
B Possible interfaces:
internal, external
1)
1)
Callback to the busy external user is possible only if the public network supports the service "Completion of
Calls to Busy Subscriber" (CCBS) end-to-end.
System Terminals a/b terminal
Activate callback R9 or R*37
Clear callback #37
! "
#
HAZAAXXA
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