Sena Bluetooth SMH10 v5.0 User's Guide - Manual (Page 35)

SMH10
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17.4 Four-way Universal Intercom
You may make a four-way Universal Intercom connection with a couple
of different configurations, 1) three SMH10s and one non-Sena Bluetooth
headset or 2) two SMH10s and two non-Sena Bluetooth headsets.
You may have a couple of other four-way Universal Intercom
configurations, 1) your headset (A), a non-Sena Bluetooth headset
(B), another SMH10 (C), and a non-Sena Bluetooth headset (D), 2)
your headset (A), a non-Sena Bluetooth headset (B), and two other
SMH10 headsets (C and D). You may make the four-way Universal
Intercom call the same way as a normal four-way intercom call.
17.4.1 Four-way Universal Intercom Case 1
Two SMH10 headsets (A and C) and two non-Sena Bluetooth headsets
(B and D).
1. You (A) may start an intercom conversation with the non-Sena
Bluetooth headset (B).
(B) (D)
(A) (C)
2. The other SMH10 (C) may join the intercom by making an intercom
call to you (A).
(B) (D)
(A) (C)
3. The non-Sena Bluetooth headset (D) may join the conference
intercom by making an intercom call to the SMH10 (C).
(B) (D)
(A) (C)