Polycom SIP 3.1 manual Naptr Naptr, http//tools.ietf.org/html/rfc2915

			Configuration Files
	NAPTR <NAPTR/>
	This configuration attribute is defined as follows:
Attribute	Permitted Values	Default	Interpretation
dns.cache.NAPTR.x.	domain name string	Null	The domain name to which this resource record
name			refers.
dns.cache.NAPTR.x.ttl	300 to 65535	300	Specifies the time interval (in seconds) that the
			resource record may be cached before the
			source of the information should again be
			consulted.
dns.cache.NAPTR.x.	0 to 65535	0	A 16-bit unsigned integer specifying the order in
order			which the NAPTR records must be processed to
			ensure the correct ordering of rules.
dns.cache.NAPTR.x.	0 to 65535	0	A 16-bit unsigned integer that specifies the order
preference			in which NAPTR records with equal "order"
			values should be processed, low numbers being
			processed before high numbers.
dns.cache.NAPTR.x.	string		Flags to control aspects of the rewriting and
flags			interpretation of the fields in the record. Flags
			are single characters from the set [A-Z, 0-9].
			The alphabetic characters are case insensitive.
			At this time only four flag, "S", “A”, “U”, and “P”
			are defined. For more information, go to
			http://tools.ietf.org/html/rfc2915 .
dns.cache.NAPTR.x.	string		Specifies the service(s) available down this
service			rewrite path. For more information, go to
			http://tools.ietf.org/html/rfc2915 .
dns.cache.NAPTR.x.	string	Null	A string containing a substitution expression that
regexp			is applied to the original string held by the client
			in order to construct the next domain name to
			lookup. The grammar of the substitution
			expression is given in RFC 2915.
			Note: This attribute is currently not used.
dns.cache.NAPTR.x.	domain name string	Null	The next name to query for NAPTR, SRV, or
replacement	with SRV prefix		address records depending on the value of the
			flags field. It must be a fully qualified
			domain-name.

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