Value Range •Yes
•No
Note
•If you select [Yes], the Reliability of Provisional Responses
function will be enabled. The option tag 100rel will be added to
the "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 No
Configuration File Reference SIP_100REL_ENABLE (Page 307)

Supports Session Timer (RFC 4028)

Description Specifies the length of time, in seconds, that the unit waits before
terminating SIP sessions when no reply to repeated requests is
received. For details, refer to RFC 4028.
Value Range 0, 60–65535 (0: Disable)
Default Value 0
Configuration File Reference SIP_SESSION_TIME (Page 304)
4.5.1.14 NAT Identity

Keep Alive Interval

Description Specifies the interval, in seconds, between transmissions of the Keep
Alive packet to the unit in order to maintain the NAT binding information.
Note
•This setting is available only when [Transport Protocol] is set
to [UDP].
Value Range 0, 10–300 (0: Disable)
Default Value 0
Configuration File Reference PORT_PUNCH_INTVL (Page 308)

Supports Rport (RFC 3581)

Description Selects whether to add the 'rport' parameter to the top Via header field
value of requests generated. For details, refer to RFC 3581.
Value Range •Yes
•No
Default Value No
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