Description Specifies whether to enable SSAF for the SIP servers (registrar server,proxy server, and presence server).Value Range • Y (Enable SSAF)• N (Disable SSAF)Note• If set to "Y", the unit receives SIP messages only from thesource addresses stored in the SIP servers (registrar server,proxy server, and presence server), and not from otheraddresses. However, if "SIP_OUTPROXY_ADDR_n" in5.8.2 SIP Settings is specified, the unit also receives SIPmessages from the source address stored in the SIP outboundproxy server.Default Value NWeb User Interface Reference Enable SSAF (SIP Source Address Filter) (Page 81)SIP_RCV_DET_HEADER_nParameter Name Example SIP_RCV_DET_HEADER_1, SIP_RCV_DET_HEADER_2, …,SIP_RCV_DET_HEADER_6Value Format BooleanDescription Specifies whether to check the username part of the SIP URI in the"To" header when receiving the INVITE message with an incorrecttarget SIP URI.Value Range • Y (Enable username check)• N (Disable username check)Note• If set to "Y", the unit will return an error reply when it receivesthe INVITE message with an incorrect target SIP URI.• If set to "N", the unit will not check the username part of the SIPURI in the "To" header.Default Value NSIP_CONTACT_ON_ACK_nParameter Name Example SIP_CONTACT_ON_ACK_1, SIP_CONTACT_ON_ACK_2, …,SIP_CONTACT_ON_ACK_6Value Format BooleanDescription Specifies whether to add the "Contact" header to SIP ACK message.Value Range • Y (Add the "Contact" header)• N (Do not add the "Contact" header)Default Value N184 Administrator Guide Document Version 2011-11Section 5 Configuration File Programming