service field
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... of transport protocol selection are those with NAPTR service fields
with values "SIP+D2X" and "SIPS+D2X", where X is a letter that
...
... SIPS URI MUST discard any services that
do not contain "SIPS" as the protocol in the service field. The
converse is not true, however. A client resolving a SIP URI ...
... TLS. Second, a client MUST discard any service fields that identify
a resolution service whose value is not "D2X", for values of X that
...
... NAPTR records, there MUST be at least three
records - one with a "SIP+D2T" service field, one with a "SIP+D2U"
service field ...
... service field, one with a "SIP+D2U"
service field, and one with a "SIPS+D2T" service field. The records
with SIPS as the protocol in the service field ...
... SIP+D2U"
service field, and one with a "SIPS+D2T" service field. The records
with SIPS as the protocol in the service field SHOULD be preferred
...
... service field, and one with a "SIPS+D2T" service field. The records
with SIPS as the protocol in the service field SHOULD be preferred
(i.e., have a lower value of the order field) above records with SIP
...
... (i.e., have a lower value of the order field) above records with SIP
as the protocol in the service field. A record with a "SIPS+D2U"
service field ...
... service field. A record with a "SIPS+D2U"
service field SHOULD NOT be placed into the DNS, since it is not
possible to use TLS ...
... The usage of NAPTR records described here requires well known values
for the service fields for each transport supported by SIP. The
...
... transport supported by SIP. The
table of mappings from service field values to transport protocols is
to be maintained by IANA ...
... registration in the RFC MUST include the following information:
Service Field: The service field being registered. An example for
a new fictitious transport protocol ...
...
Service Field: The service field being registered. An example for
a new fictitious transport protocol called NCTP might be
...
... Protocol: The specific transport protocol associated with that
service field. This MUST include the name and acronym for the
protocol, along with reference to a document that describes the
...