The internal schema refers to the physical storage structure of database.
It refers to the lowest level of abstraction.
This is also called physical schema.
It contains multiple instances of multiple internal records.
It provides information about the representation of the whole database that what data is stored in DB and in what form e.g the data is stored in the records form on the disk.
This schema gives detailed description of internal model which involves storage structure of the database, representation and classification of stored data. This format of data is only understandable by the Database management system.
a cloud phone system is a Voice over IP (VoIP) based business telephoneplatform that is hosted by a third-party provider such as OnSIP. Cloud phonesystems typically offer advanced security and telephony features such as: extension dialing, auto attendants, and conference bridges
