Registry for the Session Initiation Protocol (SIP) NAPTR Resource Record Services Field
2002-05-07
2011-03-18
SIP Table of Mappings From Service Field Values to Transport Protocols
Standards Action
SIP+D2T
TCP
SIPS+D2T
TCP
SIP+D2U
UDP
SIP+D2S
SCTP
SIPS+D2S
SCTP