Cable Multiple System Operators (MSOs) have an unprecedented opportunity to substantially increase their service revenues by giving businesses the support they need to maximize the benefits of cloud technology. This paper is the first in a two-part series describing an end-to-end virtual business-to-business (B2B) solution architecture that enables this capability for cable MSOs. The series covers “light” and “full” versions of the architecture, reflecting a go-to-market reality for many MSOs: they need to sell connectivity (light) while ensuring that their solution architecture and service components can easily scale as well as facilitate up-scopes to value-added business services(full).