IETF 63

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IETF 63 ENUM WGIANA Registration for an
Enumservice Containing Number Portability and
PSTN Signaling Informationltdraft-livingood-shock
ey-enum-npd-00gt5 August 2005Co-AuthorsJason
LivingoodRichard Shockey
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Motivation for the I-D

• This Enumservice could enable carriers, as well
  as other service providers and users, to place
  ported, pooled, and blocks of numbers and their
  associated PSTN contact information, into ENUM
  databases, using standardized, non-proprietary
  methods.
• This, in turn, could enable such parties to
  consolidate all telephone number lookups in their
  networks into a single ENUM lookup, thereby
  simplifying call routing and network operations,
  which would then result in either an on-net, or
  IP-based response, or off-net, or PSTN-based
  response.
• It is conceivable that being able to query for
  this information in ENUM could significantly
  reduce or eliminate the need for these parties to
  maintain traditional, SS7/TCAP/SIGTRAN-based
  query gateways, applications, and protocols in
  their networks.

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Motivation for the I-D

• Call routing lookup consolidation.
• No need for separate database of pooled, ported
  (LNP), and block number data.
• One DNS lookup gives BOTH on-net and off-net
  results to VoIP network element.
• Leverages investment in ENUM data management now
  underway.
• Uses standardized, DNS interfaces.
• Enables determines location of the destination as
  close to point of call origination as possible.
• Reduces complexity in a VoIP network reduced
  need for legacy PSTN signaling and databases.
• No per dip fees flat-rate DNS infrastructure.

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Example 1, Ported TN

• ORIGIN 3.1.8.7.1.8.9.5.1.2.1.e164.arpa.
• NAPTR 10 100 "u" "E2Unpdtel"
• "!.!tel[phone]rn1-215-981-7600npdi
  !"
• In this example, a Routing Number (rn) and a
  Number Portability Dip Indicator (npdi) are used
  as shown in draft-ietf-iptel-tel-np-06.txt. The
  npdi field is included in order to prevent
  subsequent lookups in legacy-style PSTN databases.

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Example 2, Non-Ported TN

• ORIGIN 3.1.8.7.1.8.9.5.1.2.1.e164.arpa.
• NAPTR 10 100 "u" "E2Unpdtel"
• "!.!tel[phone]npdi!
• In this example, a Number Portability Dip
  Indicator (npdi) is used. The npdi field is
  included in order to prevent subsequent lookups
  in legacy-style PSTN databases.

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Next Steps

• Minor editorial changes recommended on the list.
• Update document references (Yu draft iteration).
• Add more examples if possible.

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Thank you!