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X5669WUP3 User's Manual
Version 1.0
one in conversation state, it shall be possible to connect all
three into a three party conference.
To connect to both the old and the new call: R (dial tone) 3
This shall not be possible in Call waiting state, i.e. before the
subscriber has answered the waiting call. Both calls must be
answered before they are connected into a conference.
When a three party conference is invoked the conference
warning tone shall be sent to all three parties every 15
seconds throughout the call.
It must be possible for the controlling subscriber (the one
invoking the service) to switch back to a two party state with
one call on hold and one in conversation mode by R (dial tone)
2 in conference state. All other actions (R plus any other digit)
shall be disregarded in this state.
If the controlling subscriber hangs up the calls are released
immediately.
If any of the non-controlling subscribers hang up in
conference state the disconnection rules for normal calls shall
be followed, i.e. a calling subscriber is released immediately
and a called subscriber is disconnected after 90 seconds
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