When your company uses an on-premise cloud, the data servers are kept in-house and managed by the company. When you pay a software provider to manage your data on your behalf, you’re using a hosted cloud. A hybrid cloud is a combination of the two, in which data servers are still located within the organisation but are shared among other locations via the cloud.
In organisations that use the cloud, a hybrid architecture allows diverse technologies to communicate (e.g., ISDN, PSTN, SIP). A hybrid model can also be used to support various types of communications equipment when connected to an on-premises appliance.
As a result, even if the physical hardware is situated in a single core site, remote offices can be fed a service using a cloud delivery architecture.