Ok, found the correct file. Here it is.
--
Matthew A. Nicholson
Digium
" Vim syntax file
" Language: Asterisk config file
" Maintainer: brc007
" Last Change: 2005 Dec 1
" version 0.3
"
" Additional changes made 2005 Mar 7 by Corydon76
" * CVS priority, including n and s, and new label definitions
" * ENV( and LEN( support
" * Class patterns in extensions now match only the class pattern (instead of
to a following expression)
" * anthm's functions are matched
" * Variables now appear in their own colors inside expressions
"
" Additional changes made 2005 Dec 1 by Matthew A. Nicholson
" * Made highlighting less specific to extensions.conf
" * Made highlighting more robust and flexible
"
" For version 5.x: Clear all syntax items
" For version 6.x: Quit when a syntax file was already loaded
if version < 600
syntax clear
elseif exists("b:current_syntax")
finish
endif
"testing only
syn sync clear
syn sync fromstart
syn keyword asteriskTodo TODO contained
syn match asteriskComment /;.*/ contains=asteriskTodo
syn match asteriskContext /\[.\{-}\]/
syn match asteriskStatement /^\s*\w\+\s*=>\?\s*.*/
contains=asteriskOperator,asteriskKeyword,asteriskData,asteriskComment,asteriskVar,asteriskVarLen,asteriskExp,asteriskFunc
syn match asteriskKeyword /\w\+\s*=>\?/ contained
contains=asteriskOperator
syn match asteriskData /=>\?.*/ contained
contains=asteriskOperator
syn match asteriskOperator /=>\?\|,\||\|(\|)/ contained
syn match asteriskIncludeBad /^\s*#\s*[[:alnum:]]*/
syn match asteriskInclude /^\s#\sinclude\s.*/
syn match asteriskVar
/\${_\{0,2}[[:alnum:]_-]\+\(:[[:digit:]]*\)\{0,2}}/ contains=asteriskVar
syn match asteriskVarLen /\${_\{0,2}[[:alnum:]_-]*(.\{-})}/
syn match asteriskExp /\$\[.\{-}\]/
contains=asteriskVar,asteriskExp,asteriskFunc,asteriskVarLen
syn match asteriskFunc /\$([[:alnum:]_]*.*)/
" Define the default highlighting.
" For version 5.7 and earlier: only when not done already
" For version 5.8 and later: only when an item doesn't have highlighting yet
:if version >= 508 || !exists("did_conf_syntax_inits")
if version < 508
let did_conf_syntax_inits = 1
command -nargs=+ HiLink hi link <args>
else
command -nargs=+ HiLink hi def link <args>
endif
HiLink asteriskComment Comment
HiLink asteriskKeyword Type
HiLink asteriskOperator Operator
HiLink asteriskContext Identifier
HiLink asteriskInclude Preproc
HiLink asteriskIncludeBad Error
HiLink asteriskPriority Preproc
HiLink asteriskVar String
HiLink asteriskVarLen Function
HiLink asteriskExp Type
delcommand HiLink
endif
let b:current_syntax = "asterisk"
" vim: ts=8 sw=2
