Unsupported

An example of the header is shown below:

Unsupported: 100rel

The header properties are shown in the following table:

Header Level Action	Add	Delete	Modify	List Entries
Operations Supported	Yes	Yes	Yes	N/A

Keyword	Sub Types	Attributes
Capabilities	SIPCapabilities Struct	Read/Write

Below are header manipulation examples:

Example 1	Rule:	Add an Unsupported header to the message: ■ Message Type: Invite.response ■ Action Subject: header.unsupported ■ Action Type: Add ■ Action Value: 'early-session, myUnsupportedHeader'
	Result:	Unsupported: early-session
Example 2	Rule:	Modify the Unsupported header to 'replaces': ■ Message Type: Invite ■ Action Subject: header.unsupported ■ Action Type: Modify ■ Action Value: 'replaces'
	Result:	Unsupported: replaces
Example 3	Rule:	Set the path in the Unsupported headers options tag: ■ Message Type: Invite ■ Action Subject: header.unsupported.capabilities.path ■ Action Type: Add ■ Action Value: '1'
	Result:	Unsupported: replaces, path