User's Manual

111
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Sections Description
Subscribe Todisplayorconfiguresessiontimersettings.
z Active:Toenableordisablethisfeature,Ifenable,the
ongoing call will be disconnected automatically once
thesessionexpiredunlessit’sbeenrefreshedbyUACor
UAS.
z SessionExpire:Configuresessionexpiretime.
z Session Refresher: To configure who should
be
responseforrefreshingasession.
Note: UAC means User Agent Client, here stands for IP
phone. UAS means User Agent Server, here stands for SIP
server.
DTMF TodisplayandconfigureDTMFsettings.
z Type:SupportInband,Info,RFC2833ortheir 
    combination.
z HowToNotify DTMF:OnlyavailablewhenDTMF Type
isInfo/Info+Inband/Info+RFC2833.
z DTMFPayload:ToconfigurepayloadtypeforDTMF.
Note: By default, DTMF type is RFC2833 which is the
standard. Type Inband uses inband
 frequency to indicate
DTMF tone which is most used to be compatible to
traditionaltelephoneserver.TypeInfouseSIPInfomessage
toindicateDTMFmessage.