Flexible Capacity and Feature Set

When customers outsource communications services to a CaaS provider,
they pay for the features they need when they need them. The service provider
can distribute the cost services and delivery across a large customer
base. As previously stated, this makes the use of shared feature functionality
more economical for customers to implement. Economies of scale allow service
providers enough flexibility that they are not tied to a single vendor
investment. They are able to leverage best-of-breed providers such as Avaya,
Cisco, Juniper, Microsoft, Nortel and ShoreTel more economically than any
independent enterprise.