Transcript PPT Version

IETF 63 – ENUM WG
IANA Registration for an Enumservice
Containing Number Portability
and PSTN Signaling Information
<draft-livingood-shockey-enum-npd-00>
5 August 2005
Co-Authors:
Jason Livingood
Richard 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
$ORIGIN 3.1.8.7.1.8.9.5.1.2.1.e164.arpa.
NAPTR 10 100 "u" "E2U+npd:tel"
"!^.*$!tel:+1-215-981-7813;rn=+1-215-981-7600;npdi!"
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
$ORIGIN 3.1.8.7.1.8.9.5.1.2.1.e164.arpa.
NAPTR 10 100 "u" "E2U+npd:tel"
"!^.*$!tel:+1-215-981-7813;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
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•
•
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Minor editorial changes recommended on the list.
Update document references (Yu draft iteration).
Add more examples if possible.
IETF 63
ENUM WG
Thank you!
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