line provisioning Line provisioning is the way telephone companies set up ISDN to work with their customers' equipment. Since equipment and central office switching features vary, customers must specify how the ISDN line should be provisioned when they order it. If you're lucky, your hardware manufacturers will have assigned codes to make ISDN configuration easier. This clumsy setup procedure is necessary because ISDN is used for many different purposes and is not yet fully standardized. See also: ISDN