公开(公告)号：DE2813016A1

公开(公告)日：1978-10-05

申请号：DE2813016

申请日：1978-03-23

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BARCAROLI VALERIO ,  DEMICHELIS CARLO ,  GIANDONATO GIUSEPPE ,  GIORCELLI SILVANO

IPC: H04Q3/545 ,  H04Q3/54

Abstract: An apparatus for handling incoming signals from sensors monitoring the state of certain points of a telephone circuit as well as outgoing signals for drivers associated with other circuit points includes a preprocessor PE inserted between the assembly DR of sensors and drivers, on the one hand, and a processor EL, on the other hand. The preprocessor and the processor have access, through a bus 5, to a common memory ME having areas allocated to the scanning of the circuit points, to time-counting operations and to the storage of messages from the preprocessor. A microprogram memory in the preprocessor, when addressed by a sequencer CM started automatically, manually or in response to an instruction from the processor, initiates a temporary seizure of the bus-if the latter is available-whereupon an initial address is delivered from the common memory ME to a working memory ML in the preprocessor to start the scanning of successive pairs of circuit points. If the pair being scanned is connected to sensors, a change of state in either point is reported to the processor if verified by an integration procedure under the control of a read-only memory MIN in the preprocessor; if the points are connected to drivers, the same read-only memory MIN controls the emission of outgoing signals to them. Upon the completion of the scanning operation, the preprocessor performs lower-priority tasks of generating clock messages and measuring signal durations before relinquishing control of the bus.

公开(公告)号：IT1082756B

公开(公告)日：1985-05-21

申请号：IT6770277

申请日：1977-03-31

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BARCAROLI VALERIO ,  DEMICHELIS CARLO ,  GIANDONATO GIUSEPPE ,  GIORCELLI SILVANO

IPC: H04Q3/545 ,  H04M

Abstract: An apparatus for handling incoming signals from sensors monitoring the state of certain points of a telephone circuit as well as outgoing signals for drivers associated with other circuit points includes a preprocessor PE inserted between the assembly DR of sensors and drivers, on the one hand, and a processor EL, on the other hand. The preprocessor and the processor have access, through a bus 5, to a common memory ME having areas allocated to the scanning of the circuit points, to time-counting operations and to the storage of messages from the preprocessor. A microprogram memory in the preprocessor, when addressed by a sequencer CM started automatically, manually or in response to an instruction from the processor, initiates a temporary seizure of the bus-if the latter is available-whereupon an initial address is delivered from the common memory ME to a working memory ML in the preprocessor to start the scanning of successive pairs of circuit points. If the pair being scanned is connected to sensors, a change of state in either point is reported to the processor if verified by an integration procedure under the control of a read-only memory MIN in the preprocessor; if the points are connected to drivers, the same read-only memory MIN controls the emission of outgoing signals to them. Upon the completion of the scanning operation, the preprocessor performs lower-priority tasks of generating clock messages and measuring signal durations before relinquishing control of the bus.