100PS--Interphone--function

When two HM100PS headsets are connected, you will be able to use the intercom features.

  Button Operation
Send out intercom MFB Double click 
Cancel intercom Press once when sending out intercom
Answer intercom Press once
End intercom Press once
Reject intercom Press and hold the MFB for about 2 seconds when receiving intercom
Volume Up V+ Press once
Volume down V- Press once
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