AudioCodes Mediant 4000 SBC User Manual page 949

CHAPTER 60 Configuration Parameters Reference
'Proxy IP List Refresh Time'
configure voip > sip-
definition proxy-and-
registration > proxy-ip-
lst-rfrsh-time
[ProxyIPListRefreshTime]
'Always Use Proxy'
configure voip > sip-
definition proxy-and-
registration > always-
use-proxy
[AlwaysSendToProxy]
'DNS Query Type'
configure voip > sip-
definition proxy-and-
registration > dns-query
[DNSQueryType]
Parameter Description
Note: To use this Proxy Redundancy mechanism, you
need to enable the keep-alive with Proxy option, by
setting the parameter EnableProxyKeepAlive to 1 or 2.
Defines the periodic rate (in seconds) at which the
device performs DNS queries to resolve FQDNs (host
names) into IP addresses. For example, if a Proxy Set
is configured with an FQDN and the parameter is
configured to 60, the device queries the DNS server
every 60 seconds, which refreshes the Proxy Set's list
of DNS-resolved IP addresses.
The valid value is 0, or 5 to 2,000,000. The default is 60.
The value 0 disables periodic DNS queries and DNS
resolution is done only once - upon device reset, device
power up, or new and modified configuration.
Determines whether the device sends SIP messages
and responses through a Proxy server.
■ [0] Disable = (Default) Use standard SIP routing
rules.
■ [1] Enable = All SIP messages and responses are
sent to the Proxy server.
Note: The parameter is applicable only if a Proxy server
is used (i.e., the parameter IsProxyUsed is set to 1).
Enables the use of DNS Naming Authority Pointer
(NAPTR) and Service Record (SRV) queries to resolve
Proxy and Registrar servers and to resolve all domain
names that appear in the SIP Contact and Record-
Route headers.
■ [0] A-Record = (Default) No NAPTR or SRV
queries are performed.
■ [1] SRV = If the Proxy/Registrar IP address
parameter, Contact/Record-Route headers, or IP
address configured in the routing tables contain a
domain name, an SRV query is performed. The
device uses the first host name received from the
SRV query. The device then performs a DNS A-
record query for the host name to locate an IP
address.
■ [2] NAPTR = An NAPTR query is performed. If it is
successful, an SRV query is sent according to the
information received in the NAPTR response. If the
NAPTR query fails, an SRV query is performed
according to the configured transport type.
Note:
■ If the Proxy/Registrar IP address parameter, the
domain name in the Contact/Record-Route
headers, or the IP address configured in the routing
tables contain a domain name with a port definition,
the device performs a regular DNS A-record query.
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Mediant 4000 SBC | User's Manual