Sena Bluetooth EXPAND v1.0 User's Guide - Manual (Page 29)

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EXPAND
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10.5 Four-way Intercom
10.5.1 Start Four-way Intercom
You can have four-way conference intercom with
three other Sena Expand users by adding one more
intercom participant to the three-way intercom.
While you are having three-way intercom as above
in section 10.4.1, a new participant (D), who is an
intercom friend of your intercom friend (C), may join
the conference intercom by making an intercom call
to your intercom friend (C). Please note that in this
case, the new participant (D) is an intercom friend of
(C), not of you (A).
You
(A)
New Participant
(D)
= Intercom Friend of (C)
First Friend
(B)
Second Friend
(C)
10.5.2 End Four-way Intercom
As in the case of three-way intercom, you can
completely exit from the four-way conference
intercom or just disconnect a single intercom
connection.
1. Press and hold the Center Button for 1 second until
you hear a beep to terminate four-way conference
intercom. It terminates the intercom connections
between you (A), and your intercom friends (B)
and (C).
2. Press or press twice the Center Button to
disconnect the intercom connection with one of
the two intercom friends accordingly. However,
when you disconnect the second friend (C) by
pressing twice the Center Button, you will be
disconnected with the third participant (D) as
well. This is because the third participant (D) is
connected with you via the second friend (C).
Center Button Result
Press and hold for 1" Disconnect (B), (C) & (D)
Press once Disconnect (B)
Press twice Disconnect (C) & (D)
End Four-way Intercom