Carriers are moving voice services to packet networks both to reduce upfront and
operational costs and to provide more value-added services in an increasingly
competitive environment. A recent study by a major carrier found that packet
equipment was 70 percent less expensive than traditional voice equipment, and
data access lines were 60 percent to 80 percent cheaper than voice lines.
Maintenance of packet networks was 50 percent less expensive, while
provisioning was 72 percent lower.