would cause makefile generation to occur. The system always built everything, but used checksum results to decide if a file had actually changed, before updating the build output directory tree. This provided a huge reduction in build time when a core library or header was being edited. A developer could add values to an enum, but if that did not change the build output, then subsequent dependencies on that output would not have to be relinked or libraries built, etc. OAMP The system is administered through an assortment of teletypewriter "channels", also called the system console, such as the TEST channel and the Maintenance channel. Typically provisioning is done either through a command line interface (CLI) called RCV:APPTEXT, or through the menu-driven program. RCV stands for Recent Change/Verification, and can be accessed through the Switching Control Center System. Most service orders, however, are administered through the Recent Change Memory Administration Center (RCMAC). In the international market, this terminal interface has localization to provide locale-specific language and command name variations on the screen and printer output. See also PRX (telephony) – an earlier switch acquired by AT&T in Europe References External links Evolution of Switching Architecture to Support Voice Telephony over ATM by Judith R. McGoogan, Joseph E. Merritt, and Yogesh J. Dave. Extending 5ESS–2000. Bell Labs Technical Journal, April–May 2000 Switch Basics 5ESS Scribd.com Alcatel-Lucent Telephone exchange equipment