SIP_FOVR_MAX_nParameter Name Example SIP_FOVR_MAX_1, SIP_FOVR_MAX_2, …, SIP_FOVR_MAX_6Value Format IntegerDescription Specifies the maximum number of servers (including the first [normal]server) used in the fail-over process.Value Range 1–4Default Value 2SIP_REFRESHER_nParameter Name Example SIP_REFRESHER_1, SIP_REFRESHER_2, …, SIP_REFRESHER_6Value Format IntegerDescription Specifies whether to add the refresher parameter for Session Expire inSIP INVITE.Value Range 0–2– 0: Do not add the refresher parameter– 1: Add the refresher parameter with the value "UAS"– 2: Add the refresher parameter with the value "UAC"Default Value 0SIP_DNSSRV_ENA_nParameter Name Example SIP_DNSSRV_ENA_1, SIP_DNSSRV_ENA_2, …,SIP_DNSSRV_ENA_6Value Format BooleanDescription Specifies whether to request the DNS server to translate domain namesinto IP addresses using the SRV record.Value Range • Y (Enable DNS SRV lookup)• N (Disable DNS SRV lookup)Note• If set to "Y", the unit will perform a DNS SRV lookup for a SIPregistrar server, SIP proxy server, SIP outbound proxy server,or SIP presence server.• If set to "N", the unit will not perform a DNS SRV lookup for aSIP registrar server, SIP proxy server, SIP outbound proxyserver, or SIP presence server.Default Value YWeb User Interface Reference Enable DNS SRV lookup (Page 107)246 Administrator Guide Document Version 2012-025.7.2 SIP Settings