Value Range • Yes• NoNote• If you select [Yes], the Reliability of Provisional Responsesfunction will be enabled. The option tag 100rel will be added tothe "Supported" header of the INVITE message and to the"Require" header of the "1xx" provisional message. If you select[No], the option tag 100rel will not be used.Default Value NoConfiguration File Reference SIP_100REL_ENABLE (Page 307)Supports Session Timer (RFC 4028)Description Specifies the length of time, in seconds, that the unit waits beforeterminating SIP sessions when no reply to repeated requests isreceived. For details, refer to RFC 4028.Value Range 0, 60–65535 (0: Disable)Default Value 0Configuration File Reference SIP_SESSION_TIME (Page 304)4.5.1.14 NAT IdentityKeep Alive IntervalDescription Specifies the interval, in seconds, between transmissions of the KeepAlive packet to the unit in order to maintain the NAT binding information.Note• This setting is available only when [Transport Protocol] is setto [UDP].Value Range 0, 10–300 (0: Disable)Default Value 0Configuration File Reference PORT_PUNCH_INTVL (Page 308)Supports Rport (RFC 3581)Description Selects whether to add the 'rport' parameter to the top Via header fieldvalue of requests generated. For details, refer to RFC 3581.Value Range • Yes• NoDefault Value NoDocument Version 2014-05 Administrator Guide 1174.5.1 SIP Settings [Line 1]–[Line n]
