AudioCodes Mediant 800 MSBG - Page 543

Version 6.2 543 February 2011
SIP User's Manual 8. IP Telephony Capabilities
3. message-element:
Description: element in the message
Syntax: ( "header" / "body" ) "." message-element-name [ "." header-index ] * [ "." (
sub-element / sub-element-param ) ]
Examples:
• Header.from
• Header.via.2.host
• Header.contact.header-param.expires
• Header.to.uri-param.user-param
• Body.application/dtmf-relay
a. message-element-name
Description: name of the message's element - "/" only used for body types
Syntax: 1 * ( token / "/" )
Examples:
♦ from (header's name)
♦ to (header's name)
♦ application/dtmf-relay (body's name)
b. header-index
Description: header's index in the list of headers
Syntax: integer
Examples: If five Via headers arrive:
♦ 0 (default) – refers to the first Via header in the message
♦ 1 – the second Via header
♦ 4 – the fifth Via header
c. sub-element
Description: header's element
Syntax: sub-element-name
Examples:
♦ user
♦ host
d. sub-element-param
Description: header's element
Syntax: sub-element-name [ "." sub-element-param-name ]
Examples:
♦ header.from.param.expires
e. sub-element-param-name
Description: header's parameter name - relevant only to parameter sub-
elements
Syntax: token