Long Term Definition

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 uris 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 arent
  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