User's Manual

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DoorPhone Whenthereisanincomingcallfromdoorphone,setupthe
delayautoanswertime,R48Gwillautoanswerthecallafter
thetimeout. 
Note:ifyouenableAutoAnswer function, this featurewill
benotavailable.
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Others z Return Code When Refuse: Allows user to assign
specific code as return code to SIP server when an
incomingcallisrejected.
z AutoAnswer Delay: To configuredelay time before an
incomingcallisautomaticallyanswered.
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8.9  Phone>Audio
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Sections Description
EchoCanceller EchoCanceller:Toremoveacousticechofromavoice 
communicationinordertoimprovethevoicequality. 
z VAD(VoiceActivityDetection):AllowIPphonetodetect
thepresenceorabsenceofhumanspeechduringacall.
Whendetectingperiodof“silence”, VAD replacesthat