SBC acquired AT&T for a $16 billion price tag, VoIP became an almost household term. The tecnical kinks have been worked out and vendor competition is heating up. The voice and data functions available now seem to be everywhere. New VoIP networks are replacing voice-mail systems. The switch is saving time and money. The cost-savings alone (the fundamental appeal of VoIP) is alluring enough that problems with VoIP aren't problems. By next year, more than two-thirds of 131 large companies surveyed by Deloitte & Touche will be rolling out VoIP to employees. The primary driver (84%) is cost reductions. Consultants tell IT departments to assess network traffic and bandwidth needs before implementation and to continue monitoring and testing afterward.