IPR Details
British Telecommunication's Statement about IPR related to Tunnels

The text of the original IPR disclosure is available in the disclosure history.

Submitted: November 5, 1999 under the rules in RFC 2026

Note: Updates to IPR disclosures must only be made by authorized representatives of the original submitters. Updates will automatically be forwarded to the current Patent Holder's Contact and to the Submitter of the original IPR disclosure.

I. Patent Holder/Applicant ("Patent Holder")

Holder legal name British Telecommunication

II. Patent Holder's Contact for Licence Application

Holder contact name Peter Hovell
Holder contact email peter.hovell@bt.com
Holder contact info

Futures Lab
B29, Room 128, Adastral Park, Martlesham Heath, IP5 3RE
T: 01473 644208

III. IETF Document or Other Contribution to Which this IPR Disclosure Relates

Designations for Other Contributions

IV. Disclosure of Patent Information i.e., patents or patent applications required to be disclosed by RFC 2026

A. For granted patents or published pending patent applications, please provide the following information:

Patent, Serial, Publication, Registration, or Application/File number(s)

In accordance with the IETF Rules, BT would like to disclose that we have
recently applied for patents in the IPv6 space relating to:

* the establishment of tunnels using DNS as the tunnel endpoint
discovery mechanism and
* a mechanism that enables translation and tunneling to be combined
into a single device.

BT does so in the belief that these recent patent application are relevant
to present discussions within the IETF.

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending No

V. Licensing Declaration

The Patent Holder states that its position with respect to licensing any patent claims contained in the patent(s) or patent application(s) disclosed above that would necessarily be infringed by implementation of the technology required by the relevant IETF specification ("Necessary Patent Claims"), for the purpose of implementing such specification, is as follows(select one licensing declaration option only):

Licensing See Text Below for Licensing Declaration
Licensing information, comments, notes, or URL for further information

Also in accordance with IETF Rules, BT hereby gives the assurance that,
following approval by the IESG of the relevant Internet standards
specification, BT will grant licences under these patent applications and
under any resultant patents, on openly specified, reasonable and
non-discriminatory terms, to implement the Internet standards specification,
provided the licensee similarly grants licences under its necessary

For and behalf of British Telecommunications Plc.
Martin Read
Head of Licensing
Intellectual Property Department
Group Legal Services
British Telecommunications Plc
8th Floor
Holborn Centre
120 Holborn
London EC1N 2TE

Tel: +44 171 492 8152
Fax: +44 171 242 0616

Note: The individual submitting this template represents and warrants that he or she is authorized by the Patent Holder to agree to the above-selected licensing declaration.

VI. Contact Information of Submitter of this Form

Submitter name
Submitter email

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