[7] “Uniform Resource Locators” by T. Berners-Lee et al. RFC 1738, IETF,
December 1994. This RFC has the level of a proposed standard, and there
are several other RFCs with updates.
[8] “The tel URI for Telephone Numbers” by H. Schulzrinne. RFC 3966. IETF,
December 2004.
[9] “SIP: Session Initiation Protocol” by J. Rosenberg et al. RFC 3261, IETF,
June 2002.
[10] “Domain Names—Concepts and Facilities” by P. Mockapetris. RFC 1034,
IETF, November 1987.
[11] “Use of DNS Aliases for Network Services” by M. Hamilton and R.
Wright. RFC 2219, IETF, October 1997.
[12] “A DNS RR for specifying the location of services (DNS SRV)” by A.
Gulbrandsen et al. RFC 2782, IETF, February 2000.
[13] “Session Initiation Protocol (SIP): Locating SIP Servers” by J. Rosenberg
and H. Schulzrinne. RFC 3263, IETF, June 2002.
[14] The Web site for the North American ENUM trial is http://enumllc
.com.
[15] The Web site for the European ENUM working group is http://www.ripe
.net/ripe/wg.
[16] http://www.apenum.org/archive/APEET-ENUM-BoF-KL-04-
Collobration.pdf.
[17] “New Parameters for the “tel” URI to Support Number Portability” by
J. Yu, Internet draft, IETF, November 2004, work in progress.
[18] “New Parameters for the ‘tel’ URI to Support Number Portability” by
J. Yu. Internet Draft, work in progress, IETF, July 2005.
[19] “A Framework for Session Initiation Protocol User Agent Profile Deliv-
ery” by D. Petri. Internet Draft, work in progress. IETF, July 2005.
[20] “IANA Registration for an Enumservice and ‘tel’ Parameter for Calling
Name Delivery (CNAM) Information” by R. Shockey and J. Livingood.
Internet Draft, IETF, January 2006.
[21] “DNS Security Introduction and Requirements” by R. Arends, R. Austein,
M. Larson, D. Massey, and S. Rose, RFC 4033, March 2005.
[22] The IETF WG on DNS extensions, see http://ietf.org/html
.charters/dnsext-charter.html.80 Chapter 4