Networx – Enterprise Services: Awarded May 31, 2007 Telecommunications Services IP-Based – Network-Based IP VPN – Voice over IP Transport – Internet Protocol Management & Application Services – Customer Specific Design and Engineering – Managed Network Security Services – Managed Firewall – Intrusion Detection and Prevention – Managed Tiered Security – Anti-Virus Management Telecommunications Services Communications Transport – Voice – Circuit Switched Data – Toll-Free – Combined – Private Line – Frame Relay – Asynchronous Transfer Mode – Ethernet IP-Based – Premises-Based IP VPN – Content Delivery Network – Converged IP – IP Telephony – IP Video Transport – Layer 2 VPN Optical – Synchronous Optical Network – Optical Wavelength – Dark Fiber Management & Application Services – Audio Conferencing – Teleworking Solutions – Call Center/Customer Contact Center – Web Conferencing – Dedicated Hosting – Collocated Hosting – Storage – Video Teleconferencing – Unified Messaging – Collaboration Support – Internet Facsimile Security Services – Managed E-Authentication – Vulnerability Scanning – Incident Response – Secure Managed Email Access Services – Wireline Access – Broadband Access – Wireless Access – Satellite Access Mandatory Services Optional Services Special Services – Land Mobile Radio Wireless Services – Cellular/PCS – Multimode Wireless – Cellular Digital Packet Data – Paging

Networx – Enterprise Optional Services: Awarded May 31, 2007 AT&T Level 3 MCI Qwest Sprint Voice Service ü Circuit Switched Data Service Toll-Free Service Combined Service Private Line Service Frame Relay Service Asynchronous Transfer Mode Service Ethernet Service Premises-Based IP VPN Service Content Delivery Network Service Converged IP Service IP Telephony Service IP Video Transport Service Layer 2 VPN Service SONET Service Optical Wavelength Service Dark Fiber Service Video Teleconferencing Service Audio Teleconferencing Service Teleworking Service Call Center/ Customer Contact Center Service

Networx – Enterprise Optional Services Awarded (cont.) AT&T Level 3 MCI Qwest Sprint Web Conferencing ü Dedicated Hosting Service Collocated Hosting Service Storage Service Unified Messaging Service Collaboration Support Service Internet Facsimile Service Managed E-Authentication Vulnerability Scanning Service Incident Response Service Secure Managed Email Service Land Mobile Radio Service Cellular/Personal Communications Service Multimode Wireless LAN Service Cellular Digital Packet Data Service Paging Service Wireline Access Service Broadband Access Service Wireless Access Service Satellite Access Service