A demarc extension is the process of connecting your organizationâs network to a data lineâsuch as a T1, DSL, or POTSâprovided by the telephone company or another vendor.
Legacy system. In computing, a legacy system is an old method, technology, computer system, or application program, of, relating to, or being a previous or outdated computer system.. Often a pejorative term, referencing a system as legacy means that it paved the way for the standards that would follow it.
Object-oriented systems can send messages to a legacy system through the use of a package wrapper. The design strategy that would be most logical to a firm with a very limited amount of in-house IS expertise is allow end-users to create the system. A company adopting an enterprise resource planning (ERP) application, has adopted the strategy of outsourcing.