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RFC 2806bis: tel URI Henning Schulzrinne Columbia University - PowerPoint PPT Presentation

Dec 10, 2022 •279 likes •345 views

RFC 2806bis: tel URI Henning Schulzrinne Columbia University hgs@cs.columbia.edu IPTEL working group IETF 55 (November 2002, Atlanta) Status - 06 Changes: URI comparisons CI, but use lower-case parameters BNF clean-up:

  1. RFC 2806bis: tel URI Henning Schulzrinne Columbia University hgs@cs.columbia.edu IPTEL working group IETF 55 (November 2002, Atlanta)

  2. Status - 06 • Changes: – URI comparisons CI, but use lower-case parameters – BNF clean-up: component names, avoid parameter ordering constraints – recommended parameter ordering • technically, seems to have converged � WGLC? • may need editorial clean-up

  3. Open issue: context • currently, two approaches: – DNS: tel:7042;phone-context=cs.columbia.edu – prefix: tel:863-1234;phone-context=+1-914-784 • many choices for context • do we need to recommend one � – lowest number in range � longer than necessary in most cases – smallest prefix � not always unique if not divided by digit – or prefix list: ;phone-context=+31,+49 • is this useful? • e.g., European 0800 numbers?

  4. Open issue: global numbers • Global numbers are tel:+CC-something • unlike local numbers, require no context • freephone (“800”) numbers are perceived as global, but are local – regardless of what spec will say, people will write tel:+1-800-356-9377

  5. Draft progression • Planned for Draft Standard • Need interoperability matrix • ;context implementations?

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