User`s manual

Mediant 2000 & TP-1610 & TP-260
SIP User's Manual 152 Document #: LTRT-68805
Table 6-7: SIP Configuration Parameters (continues on pages 150 to 169)
ini File Field Name
Web Parameter Name
Valid Range and Description
DNSQueryType
[DNS Query Type]
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 Contact and Record-Route headers.
Valid options include:
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, the domain
name in the Contact / Record-Route headers, or the IP address defined in the
Routing tables contains a domain name without port definition, an SRV query
is performed. The gateway uses the first host name received from the SRV
query. The gateway 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
contains a domain name with port definition, the gateway performs a regular
DNS A-record query.
Note: To enable NAPTR/SRV queries for Proxy servers only, use the
parameter ProxyDNSQueryType.
ProxyDNSQueryType
[Proxy DNS Query Type]
Enables the use of DNS Naming Authority Pointer (NAPTR) and Service
Record (SRV) queries to discover Proxy servers.
Valid options include:
0 = A-Record (default)
1 = SRV
2 = NAPTR
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., ProxyIP = 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 DNSQueryType is disabled.