Add "silent call" feature

VoiSmart / pjsip-android

SIP Service for Android based on PJSIP

http://www.pjsip.org/

Apache License 2.0

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Add "silent call" feature #160

Closed aenonGit closed 2 years ago

aenonGit commented 2 years ago

Silent call is a call that does not get broadcasted via BroadcastEventEmitter#outgoingCall. It is useful when there are feature code on the pbx side which enable/disable features via sip call. Such as "dnd", "join/leave a queue".