Static Dns Cache - Yealink SIP-T3 Administrator's Manual

Default 0
Web UI
Account > Register > SIP Server Y > Transport
Parameter account.X.naptr_build
It configures the way of SRV query for the phone to be performed when no result is returned from the
Description
NAPTR query.
0-SRV query using UDP only
Permitted
Values
1-SRV query using UDP, TCP, and TLS.
Default 0
Parameter sip.dns_transport_type
Description It configures the transport protocol the phone uses to perform a DNS query.
0-UDP
Permitted
Values
1-TCP
Default 0
Parameter static.network.dns.query_timeout
It configures the interval (in seconds) at which the phone retries to resolve a domain name when the
Description
DNS server does not respond.
Permitted
Integer from 0 to 65535
Values
Default 3
Parameter static.network.dns.retry_times
Description It configures the retry times when the DNS server does not respond.
Permitted
Integer from 0 to 65535
Values
Default 2
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T53C/T43U/T42G/T42U/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T33P/T33G, X=1-4; for
T40P/T40G/T23P/T23G, X=1-3; for T31P/T31G/T31/T21(P) E2, X=1-2; for T30P/T30/T19(P)
E2/CP920/CP925/CP935W, X=1.
[2]
Y is the server ID. For
T57W/T54W/T53W/T53/T53C/T48U/T46U/T43U/T42U/T33P/T33G/T31P/T31G/T31/T30P/T30, Y=1-3; for other
phones, Y=1-2.

Static DNS Cache

Failover redundancy can only be utilized when the configured domain name of the server is resolved to multiple IP
addresses. 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 phone will attempt to
resolve the domain name of the SIP server with static DNS cache.
Support for negative caching of DNS queries as described in
when prior DNS queries have returned no results from the DNS server.
Topics
[1]
RFC 2308
<MAC>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
is also provided to allow faster failover
Account Settings
343