Warning

An example of the header is shown below:

Warning: 307 isi.edu "Session parameter 'foo' not understood"
Warning: 301 isi.edu "Incompatible network address type 'E.164'"

The header properties are shown in the following table:

Header Level Action	Add	Delete	Modify	List Entries
Operations Supported	Yes	Yes	Yes	2

Keyword	Sub Types	Attributes
N/A	N/A	N/A

Below is a header manipulation example:

Rule:	Add a Warning header to the message: MessageManipulations 0 = 1, Invite.response.180, ,header.warning, 0, '399 source.host.com \"Incompatible\"', 0;
Result:	Warning: 399 source.host.com “Incompatible”