Admin Guide - Mizu Voip

Usually In-Band DTMF are supported by any vendors in endpoint devices but will not be parsed on IVR servers because of high computation requirementsto decode the encoded RTP channels.The following DTMF global configuration settings are defined (key,default value, comment):‣ defdtmfpayload = 101; //default payload number can be also negotiated between the peers‣ maxdtmfdigit = 16; //max dtmf digit number (used in SDP)‣ ivrdtmfmethod = 4; //0=inband,1=info,2=inband+info,3=RFC2833,4=RFC2833 and info,5=inband, RFC2833 and info,6=inband, RFC2833 or info‣ dtmfdigittimeout = 6;‣ deftmfsleep = 500; //msec delay on space w or W chars‣ deftmfdelay = 0; //msec delay between 2 dtmf digit (default is 0. you might increase it usually not more than 1000 msec)‣ deftmfpackettime = 0; //0 means default value in msec (after the negotiated codec) usually between 10 and 60 msec‣ deftmfpacketcount = 6; //packets to send one dtmf digit‣ deftmfendpacketcount = 2; //packets to end one dtmf digit//the time spent for one dtmf digit is: (deftmfpacketcount + deftmfendpacketcount)*deftmfpackettime + deftmfdelay msec4.11.5. Call HoldThe call-hold feature is implemented according to SIP specification. Most UA will support it.4.11.6. Call ForwardYou can enable the call forward feature by filling the following fields in the user configuration form:forwardonbusy: telnumber where we have to forward the calls when busyforwardonnoanswer: telnumber where we have to forward the calls when we have no answer or the called user is not onlineset the “noanswertime” value after your preferencesforwardalways: reroutingCall forwards are also supported by the “Moved” (code: 300-305) SIP message, so users can set the call forward in their phones (no need to change the “forwardalwayssetting on the server)The server behavior can be controlled by the “canmove” global config option:0=not allowed1=forward the 3xx message 1 to the caller (default)2=callednumber change allowed (not safe, because pricing can change in different directions)3=domain change allowed (not safe, because pricing can change in different domains/directions)4=call routing again