TABLE OF CONTENTS

Chapter I
EXECUTIVE SUMMARY
1.1 The Impact of GigE & Wavelengths on Traditional Private Lines
1.2 Traditional Private Line Market Today
1.3 Forecast Summary


Chapter II
BACKGROUND
2.1 History and Development of Private Line Services
2.2 Evolution of Private Line Technology
2.2.1 Transition to Digital Networks
2.2.2 SONET and Optical Carrier Transmission
2.2.3 IP
2.2.4 Private Line Emulation
2.3 Types of Providers: Blurring Boundaries and Definitions
2.3.1 IXCs
2.3.2 Local Exchange Carriers
2.3.2.1 ILECs
2.3.2.2 CLECs
2.4 Description of Traditional Private Line Services
2.4.1 Circuit Types
2.4.1.1 56 Kbit/s Circuits
2.4.1.2 64 Kbit/s Clear-Channel Circuits (DS0)
2.4.1.3 Fractional T1 Circuits
2.4.1.4 T1 Circuits (DS1)
2.4.1.5 Fractional T3 Circuits (Fractional DS3)
2.4.1.6 T3 Circuits (DS3)
2.4.1.7 Optical Carrier Circuits
2.4.1.9 IRUs and Dark Fiber
2.4.3 Circuit Layout
2.4.4 Redundancy & Restoration


Chapter III
TRENDS, APPLICATIONS, AND MARKETS
3.1 Overview
3.1.1 CLECs
3.1.2 IXCs
3.1.3 Cable MSOs
3.1.4 Wireless Operators
3.1.5 The FCC
3.1.6 RBOCs
3.2 Market Forces
3.2.1 Adding Voice to Data Networks
3.2.2 Managed Packet Networks
3.2.3 Encryption over VPN
3.2.4 Integrated Services
3.3 Applications
3.3.1 Internet Access
3.3.2 Special Access
3.3.3 Local Private Lines
3.3.4 Interexchange Private Lines
3.3.4.1 Dedicated Private Line Networks
3.3.4.2 Emerging Carriers
3.4 Wholesale vs. Retail Markets
3.4.1 Wholesale Services
3.4.2 Retail Services
3.4.3 Facilities-Based Carriers vs. Resellers
3.4.3.1 Local Resellers
3.4.3.2 Long Distance Resellers

Chapter IV
EMERGING PRIVATE LINE SERVICES
4.1 GigE Services
4.1.1 Ethernet Services Technology
4.1.2 MPLS
4.1.3 Impact on Private Line Markets
4.2 Wavelength Services
4.2.1 Development of Wavelength Services
4.2.2 Wavelength Services Technology
4.2.3 Impact on Private Line Markets
4.2.4 Example Wavelength Service Providers
4.2.5 Wavelength Services Market Direction


Chapter V
NETWORK PROVIDERS
5.1 Overview
5.2 AT&T Corporation
5.2.1 Network Architecture
5.2.2 Private Line Services Offered
5.2.3 Other Services Offered
5.3 BellSouth Corporation
5.3.1 Network Architecture
5.3.2 Private Line Services Offered
5.3.3 Other Services Offered
5.4 Broadwing, Inc.
5.4.1 Network Architecture
5.4.2 Private Line Services Offered
5.4.3 Other Services Offered
5.5 Global Crossing
5.5.1 Network Architecture
5.5.2 Private Line Services Offered
5.5.3 Other Services Offered
5.6 Level3 Communications, Inc.
5.6.1 Network Architecture
5.5.2 Private Line Services Offered
5.5.3 Other Services Offered
5.7 MCI
5.7.1 Network Architecture
5.7.2 Private Line Services Offered
5.7.3 Other Services Offered
5.8 Qwest Communications International, Inc.
5.8.1 Network Architecture
5.8.2 Private Line Services Offered
5.8.3 Other Services Offered
5.9 SBC Communications, Inc.
5.9.1 Network Architecture
5.9.2 Private Line Services Offered
5.9.3 Other Services Offered
5.10 Sprint
5.10.1 Network Architecture
5.10.2 Private Line Services Offered
5.10.3 Other Services Offered
5.11 Verizon Communications
5.11.1 Network Architecture
5.11.2 Private Line Services Offered
5.11.3 Other Services Offered
5.12 WilTel Communications
5.12.1 Network Architecture
5.12.2 Private Line Services Offered
5.12.3 Other Services Offered
5.13 XO Communications
5.13.1 Network Architecture
5.13.2 Private Line Services Offered
5.13.3 Other Services Offered

Chapter VI
MARKET FORECASTS
6.1 Private Line Market Summary
6.1.1 Methodology
6.1.2 Definitions
6.2 Forecasts and Analyses
6.2.1 Total Market
6.2.2 Local and Long Distance
6.2.3 Wholesale and Retail
6.2.4 Carrier Types
6.2.4.1 ILECs
6.2.4.2 CLECs
6.2.4.3 IXCs
6.2.4.4 Totals by Carrier Type
6.2.5 Wavelength Services
6.2.6 Circuit Class
6.2.6.1 Local Circuit Count
6.2.6.2 Long Distance Circuit Count


TABLE OF FIGURES

Chapter I
I-1 Typical Layout for a Full Circuit
I-2 Total Private Line Revenue, 2004 and 2009 ($Millions)


Chapter II
II-1 Capacities of 64 Kbit/s, T1, and T3 Circuits
II-2 Typical Layout for a Full Circuit
II-3 ISDN Switched Backup
II-4 SONET Rings
II-5 Fiber-to-Fiber Redundancy
II-6 Cable-to-Cable Physical Redundancy (Diverse Cable Redundancy)


Chapter III
III-1 Common Drivers of Private Line Services
III-2 Managed Packet Network--Virtual Private Line
III-3 Integrated Services Architecture
III-4 Internet Access Architecture
III-5 Special Access Architecture
III-6 Interexchange Private Line Architecture
III-7 Typical Circuit Switched Voice Network
III-8 Typical Packet Switched Network
III-9 Typical IP Network


Chapter IV
IV-1 Resilient Packet Ring Technology


Chapter V

V-1 All-Optical Switch Network
V-2 Private Line Metro Service
V-3 Level3`s National Backbone
V-4 SONET Dedicated Ring Service
V-5 Verizon`s National Network
V-6 Circuit Emulation
V-7 XO Communications Network Map


TABLE OF TABLES

Chapter II
II-1 Digital Services Hierarchy
II-2 SONET/Optical Carrier Hierarchy
II-3 Coordinated vs. Non-Coordinated Circuits


Chapter III
III-I Mergers and Acquisitions
III-2 Cable High-Speed Lines (Thousands)
III-3 ADSL vs. Coaxial Cable: Number of High Speed Lines
III-4 ALLTEL Long Distance Penetration

Chapter IV
IV-1 SONET and Ethernet Defined Transmission Rates
IV-2 Wavelength Market Segments
IV-3 US Peak Time Data Traffic Demand: Residential and Enterprise
IV-4 Typical Service Providers Offers for Native Wavelength Services
IV-5 Typical Service Providers Offers for Wavelength Services Over SONET


Chapter V
V-1 Carrier Network Architecture Comparison


Chapter VI

VI-1 Total Private Line Revenue
VI-2 Private Line Revenue, Local vs. Long Distance
VI-3 Private Line Revenue by Wholesale/Retail Segments
VI-4 Revenue Local Private Line by Wholesale/Retail Segments
VI-5 Revenue for Long Distance Private Line by Wholesale/Retail Segments
VI-6 ILEC Private Line Revenues, Local and Long Distance
VI-7 ILEC Private Line Revenues by Wholesale/Retail Segments
VI-8 CLEC Private Line Revenues, Local and Long Distanc
VI-9 CLEC Private Line Revenues by Wholesale/Retail Segments
VI-10 IXC Private Line Revenues, Local and Long Distance
VI-11 IXC Private Line Revenues by Wholesale/Retail Segments
VI-12 Private Line Revenue Totals by Carrier Type
VI-13 Wholesale Private Line Revenue Totals by Carrier Type
VI-14 Retail Private Line Revenue Totals by Carrier Type
VI-15 Wavelength Services Private Line Revenue Totals by Carrier Type
VI-16 Local Private Line-Estimated Circuit Count by Circuit Class
VI-17 Long Distance Private Line - Estimated Circuit Count by Circuit Class

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