Sena Bluetooth SPH10 v4.2 User's Guide - Manual (Page 29)

SPH10
30
Start
Tap Jog Dial while having a mobile phone
call
End intercom
first
Tap Jog Dial
End phone call
first
Press Jog Dial for 2”
or
Tap Phone Button
or
Wait for the called person to end the call
Start & End Three-way Conference Phone Call
17. INTERCOM FAILURE
When you try to start an intercom conversation with an
intercom friend who is already having a conference
intercom with other riders or a mobile phone call,
you will hear a low tone double beep signifying an
intercom busy signal. In this case, you have to try
again later.
18. INTERCOM RECONNECTION
If your intercom friend goes out of range while having
an intercom conversation, you may hear static noise
and eventually the intercom will be disconnected. In
this case, the SPH10 automatically tries to reconnect
the intercom every 8 seconds and you will hear high
tone double beeps until the intercom is reestablished.
If you don’t want to make a reconnection, tap the Jog
Dial to stop the attempt.