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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_[1–8] (Page 181)
3.6.2.11 Keep Alive
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_[1–8] (Page 190)
3.6.2.12 Security
Enable SSAF (SIP Source Address Filter)
Description Selects whether to enable SSAF (SIP Source Address Filter) for the
SIP servers (registrar server, proxy server, and presence server).
Value Range
• Yes
• No
Note
• If you select [Yes], the unit receives SIP messages only from
the source addresses stored in the SIP servers (registrar
server, proxy server, and presence server), and not from other
addresses. However, if [Outbound Proxy Server Address] in
3.6.2.3 Outbound Proxy Server is specified, the unit also
receives SIP messages from the source address stored in the
SIP outbound proxy server.
Default Value No
Configuration File Reference SIP_DETECT_SSAF_[1–8] (Page 195)
90 Administrator Guide Document Version 2010.03.15
3.6.2 SIP Settings [Line 1]–[Line 8]