SIP Compact Headers

IANA registers headers and their abbreviations.
Abbreviation Header defined by origin (mnemonic)
a Accept-Contact draft-ietf-sip-callerprefs --
b Referred-By -refer- "by"
c Content-Type RFC 3261
e Content-Encoding RFC 3261
f From RFC 3261
i Call-ID RFC 3261
k Supported RFC 3261 "know"
l Content-Length RFC 3261
m Contact RFC 3261 "moved"
o Event -event- "occurance"
r Refer-To -refer-
s Subject RFC 3261
t To RFC 3261
u Allow-Events -events- "understand"
v Via RFC 3261

Last updated by Henning Schulzrinne