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system is an old method, technology, computer system, or application program, of, relating to, or being a previous or outdated computer system..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.
âIntegration with legacy systems has been cited as a problem by over half of respondents.â âThe legacy server may reside on a different machine and is the third tier in our architecture.â âThis meant that legacy applications would not be supported if companies moved to updated versions.â