Sena SRL2 Mode D'emploi page 280

SRL2
2. The other SRL2 (C) may join the intercom by making an intercom
call to you (A).
(B)
3. The non-Sena Bluetooth headset (D) may join the three-way
intercom by making an intercom call to the SRL2 (C).
(B)
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(A)
(C)
(D)
(A)
(C)
(D)
4. Now two SRL2 headsets (A & C) and two non-Sena Bluetooth
headsets (B & D) are connected with the four-way Universal Intercom.
(B)
You may disconnect a four-way Universal Intercom using the same
way as you do in a normal four-way intercom. Please refer to section
13.2.4, "End Multi-way Intercom" .
16.4.2 Four-way Universal Intercom Case 2
Three SRL2 headsets (A, C and D) and one non-Sena Bluetooth headset (B).
The procedure is the same as case 1 described in section 16.4.1 .
(B)
(A)
(C)
(D)
(A)
(C)
(D)