Account Settings107service type and port.Default 0Web UI Account->Register->SIP Server Y->TransportParameter account.X.naptr_build[1] .cfgDescription It configures the way of SRV query for the IP phone to be performed when no result is returned fromNAPTR query.PermittedValues0-SRV query using UDP only1-SRV query using UDP, TCP and TLS.Default 0Parameter sip.dns_transport_type .cfgDescription It configures the transport protocol the IP phone uses to perform a DNS query.PermittedValues0-UDP1-TCPDefault 0Parameter static.network.dns.query_timeout[3] .cfgDescription It configures the interval (in seconds) at which the phone retries to resolve a domain name when theDNS server does not respond.PermittedValues 0 to 65535Default 3Parameter static.network.dns.retry_times[3] .cfgDescription It configures the retry times when the DNS server does not respond.PermittedValues 0 to 65535Default 2[1]X is the account ID. X=1-8.[2]Y is the server ID. Y=1-2.[3]If you change this parameter, the IP phone will reboot to make the change take effect.Static DNS CacheFailover redundancy can only be utilized when the configured domain name of the server is resolved to multiple IPaddresses. If the IP phone is not configured with a DNS server, or the DNS query returns no result from a DNS server,you can statically configure a set of DNS NAPTR/SRV/A records into the IP phone. The IP phone will attempt to resolvethe domain name of the SIP server with static DNS cache.Support for negative caching of DNS queries as described in RFC 2308 is also provided to allow faster failover whenprior DNS queries have returned no results from the DNS server.Topics
