ENUM Administrative Process Reference Model

1
ENUM Administrative ProcessReference Model

• James Yu, NeuStar, Inc.
• December 14, 2000

2
ENUM DNS Hierarchy in the US
e164.arpa
Based on country-code
1.e164.arpa
Non-US NPAs
US NPAs
Tier 1 (US)
...
...
4.3.2.1.3.3.5.2.0.2.1. e164.arpa-gty1.com
z.z.z.1. e164.arpa
4.3. 2.1.3.3.5.2.0.2.1. e164.arpa-gtNAPTRs
(ldap//ldap.z1.com)
Tier 2
Legend DB Database LDAP Lightweight
Directory Access Protocol NPA Numbering Plan
Area
Tier 3 (Depending on the application)
LDAP DB
3
Reference Model I (General)
Legend ASP Application Service Provider TIE
Tier 1 Entity T2E Tier 2 Entity TSP
Telephony Service Provider
T1E
T2E
A
H
End User can be the end user itself or an
agent authorized to represent the end
user. TSP can offer application services
also. The TSP entity performs functions
specific to the TSP.
B
C
T2E
End User
F
G
E
D
TSP
ASP
4
End User Changes T2E
Steps 1. End User asks a new T2E (T2En) to
host all his NAPTR RRs. 2. T2En verifies End
User info. and informs T1E about T2E
assignment for the TN. 3. T1E confirms the
T2E change for the TN with the old T2E (T2Eo).
4. T1E sends T2Eo info. for the TN to
T2En. 5. T2En retrieves all the NAPTR RRs
from T2Eo and make the necessary
changes. 6. T2En informs T1E to activate the
pointer for the TN to T2En. 7. T1E sets the
pointer to T2En for the TN and acknowledges the
activation with T2En. 8. T1E informs TSP
about T2E change for the TN. 9. TSP may
interact with T2En to make changes to its NPPTR
RRs.
3
T1E
T2Eo
5
4,7
8
2,6
T2En
TSP
9
1
End User
5
End User Changes TSP
Steps 1. End User wants to port his TN to a
new TSP (TSPn). 2. TSPn contacts T1E for the
ENUM service for the TN, provides its
default T2E info., and receives End User-selected
T2E info. 3. T1E informs T2E about TSP
change and TSPns default T2E info.
4. TSPn interacts with T2E to provision its
NAPTR RRs, or T2E retrieves the NAPTR RRs
from TSPns default T2E. 5. In
synchronization with the activation for the
ported TN, T1E informs T2E to switch to
TSPns NAPTR RRs.
T1E
3,5
2
T2E
TSPn
4
1
End User
6
Reference Model II (T2ETSP)
T1E
Legend ASP Application Service Provider TIE
Tier 1 Entity T2E Tier 2 Entity TSP
Telephony Service Provider
A
B
T2E/TSP
End User
End User can be the end user itself or an
agent authorized to represent the end
user. TSP can offer application services
also. The TSP entity performs functions
specific to the TSP.
E
C
D
ASP
T2E/TSP
7
Next Steps

• Enhance the reference model to include
• Number portability administrator
• New entities that are related to
• Non-geographic numbers
• Non-US environment
• Others
• Generalize the names in the reference model to
  represent their roles in the ENUM administrative
  process