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Long Term Definition

Explore the complexities of VoIP emergency call handling, identify the basic requirements, and understand the unique challenges posed by the VoIP environment. Learn about the diverse endpoints, networks, and service overlays in VoIP. Understand the global nature of VoIP and the importance of international collaboration in protocol development.

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Long Term Definition

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  1. Long Term Definition • Because the VoIP world is SO different from the current environment, we have to go back to basic requirements: • Identify a call as an emergency call • Get it to the right PSAP • Provide location of the caller • The VoIP environment is ~2 orders of magnitude more complex than existing voice telephony systems

  2. Complexities, complexities • “Voice Service Provider” is not necessarily the pipe provider • There may not even be a “voice service provider” • Calls WILL come from the big bad Internet • You can “firewall”, but by definition, calls will be forwarded anyway, right? • There can be 4+ levels of service in the path • Calls can come from anywhere, handled by equipment shared across continents • All voice endpoints are considered mobile • End identifiers are uri’s not numbers • Media Streams are not limited to voice

  3. Chicago Café Scenario Sierra Leone Exports Ltd Sierra Leone ISP S.L. VSP Sprint globenet IL PSAP NET uunet Chicago PSAP Net tMobile

  4. Big Picture of what we want to do • Figure out what the end goal is – when we aren’t limited by PSTN, and current deployment • THEN figure out how to get from where we are to where we want to be • The tendency is always to jump to solutions, but please, we need to write down the system requirements

  5. i18n • VoIP, like the Internet does not respect political boundaries. • You cannot put a requirement on, or charge the “service provider” if he is in Sierra Leone unless you get a treaty • The protocol work has to be done in IETF (probably), and it WILL NOT do it unless it is international • NENA must start liaison work with others, e.g. ETSI if protocol work will be needed (and it will)

  6. Some VoIP basics • Lots of different kinds of endpoints • Hardphones, softphones, pdas, cellphones, wireless (802.11) • Lots of different networks • Access Network • Dialup, DSL, cable, T1, fiber • Core Network • Service overlays • Wholesale/Retail • Enterprise • VPN Tunnel

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