Cited in: RFC 4715
4 RFCs mentioned in the text of RFC 4715 (The Integrated Services Digital Network (ISDN) Subaddress Encoding Type for tel URI)
| RFC | Title | Status | Date |
|---|---|---|---|
| 2119 | Key words for use in RFCs to Indicate Requirement Levels | Best Current Practice | March 1997 |
| 3261 | SIP: Session Initiation Protocol | Proposed Standard | July 2002 |
| 3966 | The tel URI for Telephone Numbers | Proposed Standard | December 2004 |
| 4234 | Augmented BNF for Syntax Specifications: ABNF | Draft Standard | October 2005 |