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system is an old method, technology, computer system, or application program, of, relating to, or being a previous or outdated computer system..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.
During implementation, data from the legacy system is converted to the newer ERP system for historical purposes. It is recommended that an organization convert three years of historical data into the new system. Anything older than three years should be stored in a âread onlyâ copy of the legacy system.