Aastra CT9143i Release Note page 36

IP Phone Release Notes 2.3
New Features in Release 2.3
Phone State
The phone is in a call using the
conference stream and the voice
stream is free.
The active voice call is dropped.
(Mixed RTP stream was being sent
using this voice call).
A new call comes in while an active
voice call is put on hold. (Mixed RTP
stream was being sent using this voice
call).
The phone is sending the mixed RTP
stream, and there is an existing voice
call on the phone. A request for
initiating localized conference is
initiated.
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Note: When an RTP stream is being sent with RTP recording and
simultaneous playing (mix), the IP Phone LCD displays an icon with an
'm' on top to indicate that a mixed RTP stream is being sent.
Action When RTP Transmitting
Paging call is initiated using the voice
stream with the mixed audio from the
conference stream; paging line does not
display.
RTP stream is dropped.
RTP mixed stream is sent for the currently
active call.
Localized conference request is declined,
and the focus is given back to the initiating
line.
RN-001029-02, Release 2.3, Rev 00