General Features409Values 1-EnabledDefault 0Web UI Features->General Information->Accept SIP Trust Server Only100 Reliable RetransmissionAs described in RFC 3262, 100rel tag is for the reliability of provisional responses. When presenting in a Supportedheader, it indicates that the phone can send or receive reliable provisional responses. When presenting in a Requireheader in a reliable provisional response, it indicates that the response is to be sent reliably.Example of a SIP INVITE message:INVITE sip:1024@pbx.test.com:5060 SIP/2.0Via: SIP/2.0/UDP 10.3.6.197:5060;branch=z9hG4bK1708689023From: "1025" ;tag=1622206783To: Call-ID: 0_537569052@10.3.6.197CSeq: 2 INVITEContact: Authorization: Digest username="1025", realm="pbx.test.com", nonce="BroadWorksXi5stub71Ts2nb05BW", uri-i="sip:1024@pbx.test.com:5060", response="f7e9d35c55af45b3f89beae95e913171", algorithm=MD5, cnon-ce="0a4f113b", qop=auth, nc=00000001Content-Type: application/sdpAllow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE,MESSAGEMax-Forwards: 70User-Agent: Yealink T58 58.80.0.5Supported: 100relAllow-Events: talk,hold,conference,refer,check-syncContent-Length: 302Topic100 Reliable Retransmission Configuration100 Reliable Retransmission ConfigurationThe following table lists the parameter you can use to configure the 100 reliable retransmission.Parameter account.X.100rel_enable[1] .cfgDescription It enables or disables the 100 reliable retransmission feature.PermittedValues0-Disabled1-Enabled
