3Com V7122 User Manual page 179

ini File Field Name
Web Parameter Name
ProxyDNSQueryType
[Proxy DNS Query Type]
UseSIPTgrp
[Use Tgrp Information]
V7122 Gateway User Guide
Valid Range and Description
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 (for example, 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 (for example, ProxyIP = domain.com:5080), the gateway
performs a regular DNS A-record query.
When enabled, NAPTR/SRV queries are used to discover
Proxy servers even if the parameter DNSQueryType is
disabled.
0 = Tgrp parameter isn't used (default).
1 = (send only) The trunk group number is added as the 'tgrp' parameter to
the Contact header of outgoing SIP messages. If a trunk group number is
not associated with the call, the 'tgrp' parameter isn't included. If a 'tgrp'
value is specified in incoming messages, it is ignored.
2 = (send and receive) The functionality of outgoing SIP messages is
identical to the functionality described in option (1). In addition, for incoming
SIP messages, if the Request-URI includes a 'tgrp' parameter, the gateway
routes the call according to that value (if possible). If the Contact header
includes a 'tgrp' parameter, it is copied to the corresponding outgoing
messages in that dialog.
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