for anyone who can update this page for NAPTR ex
http://wiki.freeswitch.org/wiki/DNS
# NAPTR for SIP over UDP
example.com NAPTR 10 100 "S" "SIP+D2U" "" _sip._udp.example.com.
# NAPTR for SIP over TCP
example.com NAPTR 20 100 "S" "SIP+D2T" ""
_sip._tcp.example.com.
# NAPTR for SIP over TLS
example.com NAPTR 20 100 "S" "SIPS+D2T" "" _sip._tcp.example.com.
Regards
Franck
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