Abstract: An embedded modem that does not require a dedicated controller and operates with existing computer to interpret new and redefined communications interrupt requests. In response to an interrupt request, the control of the processor is transferred from the communications software to a driver program stored in the main memory for the processor. Under the operation of the driver program, the processor interprets control characters and causes the appropriate commands to be carried out in the modem. Once these commands have been processed, the control of the processor reverts back to the communications program. The processor thereby functions as a virtual controller that is interpreted to be an external controller by the communications program.

Abstract: There is disclosed a system and method for controlling the cross connect field of a multi-locational switched network from a single location under control of instructions from the end users. The different crossconnect fields of the entire switched network are controlled in response to instructions received by the controller from each end user. The instructions specify the period of time when the end user desires to establish certain connections through the network and also specify the band-width required during that period of time. The controller preassigns certain channels of the internetwork links and at the designated time period the connections are established. The system is designed to provide cost accounting and auditing information pertaining to the reserved time for each end user on a link by link basis as well as for the time during which the links were actually used for communication.

Abstract: There is disclosed a system and method for controlling the cross connect fields of a multi-locational switched network from a single location under control of instructions from the end users. The different cross connect fields of the entire switched network are controlled in response to instructions received by the controller from each end user. The instructions specify the period of time when the end user desires to establish certain connections through the network and also specify the band-width required during that period of time. The controller preassigns certain channels of the internetwork links and at the designated time period the connections are established. The end user is billed only for the time the links were actually assigned.

Abstract: A system and method are disclosed for testing a switched telecommunications network by utilizing a terminating transponder unit 410 to respond with a unique identification code over switched network 300 following the receipt of a test signal from an originating micro logic terminal unit 210 over switched network 300, both units operating under the control of a central general purpose mini-computer 100.

Abstract: Apparatus for automatically obtaining data useful to determine accuracy of telephone toll message accounting equipment and procedures is disclosed. The apparatus is connected to plural telephone network lines of the telephone system at a central office location and simultaneously dials a plurality of predetermined long distance telephone numbers, each of which returns detectable information when successfully dialed up. The presence of the detectable information, such as test tone, is noted and the time is logged. This information is then automatically compared by a central control computer with the billing information collected by the billing computer to ascertain operational accuracy of the latter. The apparatus is automatically remotely operated by the central control computer under a predetermined protocol.