[Sip] I-D ACTION:draft-ietf-sip-call-auth-04.txt

[[e-mail]]

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Session Initiation Protocol Working Group of the IETF.

	Title		: SIP Extensions for Media Authorization
	Author(s)	: W. Marshall et al.
	Filename	: draft-ietf-sip-call-auth-04.txt
	Pages		: 14
	Date		: 06-Mar-02
	
This document describes the need for QoS and media authorization and 
defines a SIP extension that can be used to integrate QoS admission 
control with call signaling and help guard against denial of service 
attacks. The use of this extension is only applicable in administrative 
domains, or among federations of administrative domains with previously 
agreed-upon policies, where both the SIP proxy authorizing the QoS, and 
the policy control of the underlying network providing the QoS belong to 
that administrative domain or federation of domains.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-sip-call-auth-04.txt

To remove yourself from the IETF Announcement list, send a message to 
ietf-announce-request with the word unsubscribe in the body of the message.

Internet-Drafts are also available by anonymous FTP. Login with the username
"anonymous" and a password of your e-mail address. After logging in,
type "cd internet-drafts" and then
	"get draft-ietf-sip-call-auth-04.txt".

A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html 
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


Internet-Drafts can also be obtained by e-mail.

Send a message to:
	[e-mail].
In the body type:
	"FILE /internet-drafts/draft-ietf-sip-call-auth-04.txt".
	
NOTE:	The mail server at ietf.org can return the document in
	MIME-encoded form by using the "mpack" utility.  To use this
	feature, insert the command "ENCODING mime" before the "FILE"
	command.  To decode the response(s), you will need "munpack" or
	a MIME-compliant mail reader.  Different MIME-compliant mail readers
	exhibit different behavior, especially when dealing with
	"multipart" MIME messages (i.e. documents which have been split
	up into multiple messages), so check your local documentation on
	how to manipulate these messages.
		
		
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.

ftp://ftp.ietf.org/internet-drafts/draft-ietf-sip-call-auth-04.txt"><ftp://ftp.ietf.org/internet-drafts/draft-ietf-sip-call-auth-04.txt>