Installation & Operation Manual 552 Document # LTRT-92224
Mediant 8000
Parameter
Name
Type
Provisioning
Type
Description
Use Gateway
Name For
Options
Enum
Disable, Enable
Instant Defines Request-URI host part in SIP
'OPTIONS' messages, used for keep-alive
with SIP Proxy servers:
 Disable – use the gateway's IP address
in keep-alive OPTIONS messages
(default).
 Enable – use 'GatewayName' in keep-
alive OPTIONS messages.
Proxy DNS
Query Type
Enum
A-Record, SRV,
NAPTR
Instant Enables the use of DNS Naming Authority
Pointer (NAPTR) and Service Record
(SRV) queries to discover Proxy servers:
 If set to A-Record, no NAPTR or SRV
queries are performed.
 If set to SRV and 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 gateway then performs
DNS A-record queries for each Proxy
host name (according to the received
weights) to locate up to four Proxy IP
addresses. Therefore, if the first SRV
query returns two domain names, and
the A-record queries return two IP
addresses each, no more searches are
performed.
 If set to 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.
If the Proxy IP address parameter contains
a domain name with port definition (e.g.,
"domain.com:5080"), the gateway performs
a regular DNS A-record query.
Note: When enabled, NAPTR/SRV queries
are used to discover Proxy servers even if
the parameter DNS Query Type is
Disabled.
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