AudioCodes Media 800 MSBR - Page 797

Version 6.6 797 Mediant 800 MSBR
User's Manual 66. Configuration Parameters Reference
Parameter Description

[2] Routing Table = Uses the Routing table to locate the destination
and then sends a new INVITE to this destination.
Notes:
 This parameter is applicable only to the Gateway / IP-to-IP
application.
 When this parameter is set to [1] and the INVITE sent to the Proxy
fails, the device re-routes the call according to the Standard mode
[0].
 When this parameter is set to [2] and the INVITE fails, the device re-
routes the call according to the Standard mode [0]. If DNS resolution
fails, the device attempts to route the call to the Proxy. If routing to
the Proxy also fails, the Redirect/Transfer request is rejected.
 When this parameter is set to [2], the XferPrefix parameter can be
used to define different routing rules for redirect calls.
 This parameter is disregarded if the parameter AlwaysSendToProxy
is set to 1.
Web/EMS: DNS Query
Type
CLI: dns-query
[DNSQueryType]
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)
 [1] SRV
 [2] NAPTR
If set to A-Record [0], no NAPTR or SRV queries are performed.
If set to SRV [1] and the Proxy/Registrar IP address parameter,
Contact/Record-Route headers, or IP address defined 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.
If set to NAPTR [2],
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/Registrar IP address parameter, the domain name in the
Contact/Record-Route headers, or the IP address defined in the
Routing tables contain a domain name with port definition, the device
performs a regular DNS A-record query.
If a specific Transport Type is defined, a NAPTR query is not
performed.
Note: To enable NAPTR/SRV queries for Proxy servers only, use the
parameter ProxyDNSQueryType.
Web: Proxy DNS Query
Type
CLI: proxy-dns-query
[ProxyDNSQueryType]
Enables the use of DNS Naming Authority Pointer (NAPTR) and
Service Record (SRV) queries to discover Proxy servers.
 [0] A-Record (default)
 [1] SRV
 [2] NAPTR
If set to A-Record [0], no NAPTR or SRV queries are performed.
If set to SRV [1] 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