Level 3 Rounds Out VoIP Offerings: Page 3 of 3

IP telephony over controlled Internet backbones or a corporation's private network can provide quality matching that of PSTN. Quality over the public Internet, however, varies considerably.

Nevertheless, VoIP as an alternative to traditional telephone service has gained corporate interest, as the Internet becomes the universal transport for all voice, data and video communications worldwide. Packet networks are less expensive and more scalable than traditional circuit-switched telephone networks, and naturally integrate with Internet-based applications.