Internet telephony uses the Internet to send audio, video, and fax between users in real time. A basic IP telephone system has two components: IP phones for users and a media gateway controller that provides call control and coordination. For interconnection with traditional phone systems, media and signaling gateways translate between IP and public switched telephone networks. IP telephony works by digitizing, compressing, and packetizing telephone signals and routing them over the Internet using IP protocols. While offering lower costs, internet telephony has reliability issues and cannot currently support emergency calls.

7. IP phones: Grandstream GXP2000 £64.00 * Grandstream GXP-280 £54.00 * Grandstream GXP2020 £99.00 * snom SNOM300UK £99.00 *

13. World Internet Telephony BOOM: Consumer & Small Business Enterprise & Institutions Wholesale 1997 VoIP calls - $198millian voip calls (220% annual growth) End 1999 $600 million VoIP calls End 2001 $1.89 billion VoIP calls Source: Forrester Research 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 1997 1998 1999 2000 2001 2002 2003 2004 2005

18. Thank Y OU..!! Any