9 Computer software for use in Internet telephony, namely, software telephone sets, voice over Internet protocol gatekeepers, voice mail servers, call managers, Internet protocol routing, network address translation and proxy server firewalls, software interfaces to electronic mail programs, contact managers, and lightweight directory access protocol databases; computer hardware, namely, networked computer systems consisting of computer software for use for Internet telephony, public switched telephone network gateways, voice over Internet telephone sets, Internet protocol telephony call managers and gatekeepers, Internet Protocol routers, switches, firewalls, network address translators, universal serial bus telephone handsets, telephone headsets, speaker phones and universal serial bus to legacy telephone set adapters