Foreword... Foreword 1

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1 Foreword... Foreword 1 1. Introduction Purpose and Scope Structure and Use of This Document Document Conventions Number Portability Service Provider Portability History of Service Provider Portability Technical Approaches Considered Technical Requirements Development for Number Portability Establishment of the Number Portability Administration Establishment of Number Portability Guidelines Number Portability Architecture Number Portability Order Processing- NANC Operations Flows Service Switching Point (SSP) Provisioning Establishing the Trigger for a Given NPA-NXX Default Routing Assigning LRNs to Switches Ported-Out and Number Portability-Reserved Markings Billing-Related Provisioning Service Characteristics of Service Provider Portability Service Switching Point (SSP) Common Channel Signaling (CCS) Network Number Portability Database (NPDB) N-1 Networks Default Routing Transition Mechanism Message Relay Function / Number Portability (NP)Global Title Translation (GTT) Number Portability Call Processing - Call Flows Direct Call Completion - Originating Switch to the Recipient Switch Operator Services and Number Portability Usage Measurements and Billing Considerations Connecting Network Access (CNA) and AMA Recordings v

2 Default Flat Rate Recordings Jurisdiction Information Parameter (JIP) Deployment Status of Number Portability in the United States Location Portability History of Location Portability Technical Requirements Development for Location Portability Factors Inhibiting Deployment of GUBB Solution Expected Industry Path Forward Service Portability Deployment Status of Service Portability Wireless Number Portability History of Wireless Number Portability Establishment of Mandates Technical Requirements Development for Wireless Number Portability Establishment of Number Portability Administration Proposed Architecture for Full Wireless Number Portability Proposed Service Characteristics for Wireless Number Portability Mobile Identification Number (MIN)/Mobile Directory Number (MDN) Split Mobile Station (MS) Home Location Register (HLR) Mobile Switching Center (MSC) N-1 Network CCS/IS-41 C Network Proposed Call Processing / Call Flows Call Completion from a Wireline to Ported Wireless Number Call Completion from Wireless to Ported Wireline Number Call Completion to a Roaming Ported Wireless User Call Completion to Wireless User after MIN/HLR Mismatch Number Portability in Other Countries Other Regulatory Decisions Outside the U.S European Union Australia Interest in Other Countries Technical Approaches Considered in International Standards2 78 vi

3 Onward Routing All Call Query Dropback Query on Release Number Pooling History of Number Pooling Technical Approaches Considered Number Pooling without Number Portability Individual Telephone Number (ITN) Pooling Unassigned Number Porting (UNP) Establishment of Number Pooling Administration Establishment of Number Pooling Guidelines Role of the Industry Numbering Council (INC) Role of the Number Portability Administration Center (NANC) Network Requirements Development Number Pooling Order Processing - NANC Operations Flows Pooling of Non-Contaminated Block Pooling of Contaminated Block De-Pooling (Reclamation) of Block Disconnect of Ported Pooled Number Number Pooling Administration Service Switching Point (SSP) Administration NP-Reserved Markings Ported-Out Markings Administrative Responsibilities of Service Providers Code Holder Responsibilities LERG Assignee Responsibilities Block Applicant Responsibilities Block Holder Responsibilities Thousands-Block Number Pooling Service Characteristics Service Switching Point (SSP) Common Channel Signaling (CCS) Network Number Portability Database (NPDB) Default Routing to the Code Holder Snapback to the Block Holder Routing to Unallocated Numbers / Cause Code Efficient Data Representation (EDR) Number Pooling Call Processing - Call Flows Direct Call Completion - Originating Switch to Block Holder Switch Call Completion Via Code Holder Switch Calls Completed through an Interexchange Carrier (IXC) Ported Number in a Pooled Block vii

4 3.6 Current Regulatory Environment and Trial Deployments State Regulatory Activity Federal Regulatory Activity Number Exhaust in Other Countries Bibliography and References... References 1 Glossary...Glossary 1 viii

5 List of Figures List of Figures Figures Figure 2-1. Number Portability Service Architecture in the United States Figure 2-2. Inter-Service Provider LNP Operations Flow - Provisioning Figure 2-3. Inter-Service Provider Operations Flow - Provisioning without Transition Mechanism Figure 2-4. Inter-Service Provider Operations Flow - Provisioning With Transition Mechanism Figure 2-5. Inter-Service Provider Operations Flow - Conflict Flow for Provisioning Figure 2-6. Inter-Service Provider Operations Flow - Cancellation Flow for Provisioning Figure 2-7. Inter-Service Provider Operations Flow - Cancellation Conflict Flow Figure 2-8. NP GTT Function in Support of Calling Name Delivery Figure 2-9. Originating Switch NP Processing with Direct Call Completion to the Recipient Switch Figure Call Completion via the Donor Switch, with a Donor Switch NP Query Figure IIXC-Routed Call; NP Query at IXC (N-1) Switch Figure Proposed Wireless Number Portability Architecture Figure Call Completion from Wireline to Ported Wireless Figure Call Completion to Ported Wireline Number Figure Call Completion to Roaming Ported Wireless User Figure Call Completion after MIN/HLR Mismatch Figure ITU Illustration of Onward Routing Figure ITU Illustration of All Call Query One Step by a Transit Network Figure ITU Illustration of Dropback Figure ITU Illustration of Query on Release (Originating Network Query) Figure 3-1. Pooling of Non-Contaminated Block Figure 3-2. Pooling of Contaminated Block Figure 3-3. De-Pooling of Block Figure 3-4. Disconnect of Ported Pooled Number Figure 3-5. NP-Reserved Marking for Number Pooling Figure 3-6. Direct Call Completion - Originating Switch to Block Holder Switch Figure 3-7. Call Completion Via Code Holder Switch Figure 3-8. Call Completion Through an IXC Figure 3-9. Ported Number in a Pooled Block ix

6 List of Figures x

7 List of Tables List of Tables Tables Table 2-1. Transition Mechanism Table 2-2. Service Provider Portability Deployment Statistics in the U.S xi