AudioCodes Mediant 4000 SBC User Manual page 853

User's Manual
Parameter
Proxy DNS Query Type
configure voip > sip-definition
proxy-and-registration > proxy-
dns-query
[ProxyDNSQueryType]
Use Gateway Name for
OPTIONS
configure voip > sip-definition
settings > use-gw-name-for-opt
[UseGatewayNameForOptions]
Version 7.2
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.

If a specific Transport Type is configured, a NAPTR query is
not performed.

To enable NAPTR/SRV queries for Proxy servers only, use
the global parameter ProxyDNSQueryType, or use the Proxy
Sets table.
Global parameter that defines the DNS query record type for
resolving the Proxy server's configured domain name (FQDN)
into an IP address.

[0] A-Record (default) = A-record DNS query.

[1] SRV = If the Proxy IP address parameter contains a
domain name without port definition (e.g., ProxyIP =
domain.com), an SRV query is performed. The SRV query
returns up to four Proxy host names and their weights. The
device then performs DNS A-record queries for each Proxy
host name (according to the received weights) to locate up to
four Proxy IP addresses. Thus, if the first SRV query returns
two domain names and the A-record queries return two IP
addresses each, no additional searches are performed.

[2] NAPTR = NAPTR query is done. If successful, an SRV
query is sent according to the information received in the
NAPTR response. If the NAPTR query fails, an SRV query is
done according to the configured transport type. If the Proxy
IP address parameter contains a domain name with port
definition (e.g., ProxyIP = domain.com:5080), the device
performs a regular DNS A-record query. If a specific Transport
Type is defined, a NAPTR query is not performed.
Note:

This functionality can be configured per Proxy Set in the Proxy
Sets table (see ''Configuring Proxy Sets'' on page 363).

When enabled, NAPTR/SRV queries are used to discover
Proxy servers even if the parameter DNSQueryType is
disabled.
Determines whether the device uses its IP address or string
name ("gateway name") in keep-alive SIP OPTIONS messages
(host part of the Request-URI). To configure the "gateway name",
use the SIPGatewayName parameter. The device uses the
OPTIONS request as a keep-alive message with its primary and
redundant SIP proxy servers (i.e., the EnableProxyKeepAlive
parameter is set to 1).

[0] No = (Default) Device's IP address is used in keep-alive
OPTIONS messages.

[1] Yes = Device's "gateway name" is used in keep-alive
OPTIONS messages.

[2] Server = Device's IP address is used in the From and To
headers in keep-alive OPTIONS messages.
853
60. Configuration Parameters Reference
Description
Mediant 4000 SBC