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system is an old method, technology, computer system, or application program, of, relating to, or being a previous or outdated computer system..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.
Within IBM the PureData family of systems is an umbrella for their appliances and what they refer to as Expert Integrated Systems. The software that runs on today's PDA systems is still known as Netezza Performance Server (aka NPS).