1. IEEE Standards for BPL Forum June 7, 2004 Joseph A. Marsilii, Jr., PE Main.net-Power Line Communications Inc. 12355 Sunrise Valley Drive, Suite 650 Reston, VA 20190 Phone: +1.703.476.4700 ext 12 FAX: +1.703.476.4701 www.powerline-plc.com

2. Main.net Overview Formed in 1999, Main.net is the world leader of power line access technology. Developer and distributor of a complete end-to-end high speed BPL system. Joint venture subsidiaries in Germany and the US. Deployments in more than 50 cities in 15 countries. Commercial service of broadband to the socket using Main.nets PLUS system US, Germany, Sweden, UK and Austria. European Customers include: EDF (France), Iberdrola (Spain), ENEL (Italy) MVV (Germany) US Customers include the leaders in the power industry: Southern, Duke, Ameren, PPL, Dominion, and CMS. Over 80,000 active operating network elements deployed and over 20,000 world-wide users. Largest Commercial Operation: 90,000 HH Passed/ 12,000 users.

3. Main.nets BPL Components Four BPL Network Components Medium Voltage Modem CuPLUS is the interface between the PLC network and the traditional backhaul connection. RpPLUS is a PLC network repeater that expands the reach of the network. Medium Voltage Coupler Overhead Coupler Neutral Coupler URD Coupler Customer Modem NtPLUS is the network termination device which connects the customers PC to the Internet. BPL Network Monitoring System NmPLUS is the PLUS element network monitoring and maintenance system PLUS Modem (RpPLUS)

4. Main.net Deployment Timeline December Company Founded 20002001200220032004 March European Prototype March US Demo March US Pilot September MV Coupler Deployed (US) March Commercial Service Launch (Germany) March Commercial Service Launch (US) Today (US ONLY): 6,000 homes passed 1,200 Access Elements (MV Couplers) 600 subscribers

9. Main.net-Power Line Communications Inc. Main.net-Power Line Communications Inc. 12355 Sunrise Valley Drive, Suite 650 Reston, VA 20190 Phone: +1.703.476.4700 ext 12 FAX: +1.703.476.4701 www.powerline-plc.com To contact us….

10. Copyright 2004, Main.net Communications Ltd. All rights reserved. All contents of this document are subject to change without notice and do not represent a commitment on the part of Main.net or its subsidiaries. Every effort is made to ensure the accuracy of this information. However due to ongoing product improvements and revisions, Main.net and its subsidiaries cannot guarantee the accuracy of this material, nor can it accept responsibility for errors or omissions. No guaranties of any nature are extended by the information contained in these copyrighted materials. Usage or implementation of any one of the concepts, applications, or ideas described in this document may infringe one or more patents or other intellectual property rights owned by Main.net, its subsidiaries and/or third parties. Procurement of appropriate intellectual property rights and license is solely the responsibility of the system implementer. The software referred to in this document is provided under a Software License Agreement. This document is confidential, and any copying or disclosure of its contents is strictly prohibited, unless prior written consent is obtained from Main.net Communications Ltd. or its subsidiaries. PLUS, Power Line Ultimate System, AmrPLUS, CuPLUS, ExPLUS, NmPLUS, MACPLUS, NtPLUS, PLUServer, PcPLUS, HotPLUS, RcPLUS, RgPLUS, RpPLUS, RuPLUS, TelPLUS, are trademarks of Main.net Communications. Other company, brand, product, and other service names are the trademarks or registered trademarks of their respective holders. Copyright Notice