The document presents an overview of PAETEC, a communications solutions provider, to Christenson Electric. It summarizes PAETEC's financial highlights, company highlights including network infrastructure and geographic reach. It also outlines PAETEC's products and solutions for data, voice, and managed services. Additionally, it discusses PAETEC's focus on unmatched customer service and industry-leading customer satisfaction scores.

1. Presented to Christenson Electric By Pam Gottlieb and Alisha Johnson [email_address] , [email_address]

2. Agenda Financial Highlights Company Highlights PAETEC’s Network Products & Solutions Industry Focus Unmatched Customer Service Industry-Leading Customer Satisfaction The PAETEC Difference EFS EFS and how it works? The benefits of EFS to Christenson

3. Financial Highlights Headquartered in Rochester, NY NASDAQ: PAET Approximately 4,000 Employees Revenue – $358.8 Million * Adjusted EBITDA – $59.5 Million * Free Cash Flow – $38.1 Million * PAETEC is a Leading Communications Solutions Provider *Q1’08

4. Company Highlights Serving 82 of the Top 100 MSAs 4.1 Million Access Lines Equivalents 157,765 T-1s Installed 77 Voice Switches 39 Soft Switches 17,000 Owned Fiber Route Miles 24 x 7 x 365 Network Operations Centers: Cedar Rapids, IA; Charlotte, NC; Rochester, NY ISO 9001:2000 Certified Data Center - Conshohocken, PA

5. PAETEC’s Network

6. Products & Solutions Core Services Value-Added Products & Services Solutions Data Communications MPLS VPN Dedicated Internet Access Business Continuity E-mail / Web Security Fixed Wireless Security MPLS VPN E-mail / Web Security Network Firewall CPE Firewall Managed Services Managed Router Expanded Rental Network Performance Reporting Financing Equipment Allworx Phone & Network Systems Network Engineering & Consultation Network Maintenance & Support Network Engineering & Consultation Network Maintenance & Support Allworx Phone & Network Systems Equipment for Services Equipment Rental Applications PINNACLE Communications Management Suite Data Center Colocation Services Dedicated Server Data Backup & Recovery Data Backup & Recovery Colocation Services Dedicated Server Data Backup & Recovery Shared Web Hosting Voice Dynamic IP Conferencing Services IP Hosted Telephony Trader Voice Services Local, Long Distance & Toll-Free Services IP Contact Center Services Toll-Free Routing Services Direct Trunk Overflow Toll-Free Routing Services Direct Trunk Overflow IP Hosted Telephony IP Contact Center Services

7. Industry Focus City of Baltimore Commonwealth of Massachusetts State of New York State of South Carolina Government Bank of America Citigroup HSBC Bank Wachovia Securities Financial Services American Breast Cancer Foundation Dartmouth Hitchcock Medical Center Lifespan MedStar Health Healthcare Hyatt Starwood Hotels & Resorts Tempus Resorts The Palms South Beach Hotel Hospitality Stanford University Georgetown University Boston University Cornell University Higher Education Bond, Schoeneck & King Cadwalader, Wickersham & Taft Haylor, Freyer & Coon Stantec Professional Services Bobcat of Central Florida iPARTY Kinney Drugs Planet Hollywood Retail

8. Unmatched Customer Service 65 dedicated Customer Service representatives 244 highly trained NOC technicians In 2007, 86% of all incoming calls were answered by a live person in 20 seconds or less Industry-leading customer retention of 99.7% ( monthly average) Network Operations Center - Charlotte, NC Network Operations Center - Rochester, NY

9. Industry-Leading Customer Satisfaction Net Promoter Score (NPS) measures highly satisfied customers PAETEC adopted the NPS methodology to measure the satisfaction of our customer base PAETEC employees’ bonuses depend on constant improvement of our NPS score Data for non-PAETEC companies was gathered from the “Net Promoter Telecommunications Industry Report of 33 Telecommunications Companies – June 2006,” completed by Satmetrix Systems. 0 PAETEC 22.7 BellSouth 16.08 Verizon 14.48 -5.7 SBC -8.45 AT&T -11.01 Qwest -28.93 Sprint Telecom NPS Benchmarks

10. We Listen to Our Customers Discuss business challenges Build the foundation for PAETEC’s product and service investments through customer feedback Access PAETEC senior executives Network with peers Customer Advisory Board Program Regional forums for knowledge sharing and relationship building between PAETEC and our customers 2007 Customer Advisory Board Meeting “ I have been a CAB member for the past three years and value the program completely. The LEGO Group truly benefits from the products, services, and actions that result from CABs.” Joanne Zanetti, LEGO Systems, Inc.

11. The PAETEC Difference Profitable growth company National network presence Comprehensive suite of communications-related solutions Trusted business partner Dedication to providing unmatched service