公开(公告)号：IT1157089B

公开(公告)日：1987-02-11

申请号：IT6836482

申请日：1982-11-24

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BELFORTE PIERO

IPC: H03K19/00 ,  H03K19/018 ,  H04L

公开(公告)号：IT1128291B

公开(公告)日：1986-05-28

申请号：IT6774580

申请日：1980-05-13

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BELFORTE PIERO ,  BOSTICA BRUNO ,  PILATI LUCIANO

IPC: H04Q3/52 ,  H04Q11/04 ,  H04Q11/08 ,  H04M

Abstract: The present PCM switching element is intended to be used in digital telephone exchanges for the making of switching or concentration stages of whatever capacity. … In fact, structures consisting of a plurality of such elements are easily performed thanks to use of a bit associated with each outgoing PCM channel, called "busy bit". … The switching element can be controlled by a commercially available microprocessor and can be made as an integrated circuit.

公开(公告)号：CA1201189A

公开(公告)日：1986-02-25

申请号：CA423505

申请日：1983-03-14

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BELFORTE PIERO ,  BOSTICA BRUNO ,  BOVO AMILCARE ,  CANATO LUIGI ,  PILATI LUCIANO

IPC: H04Q3/52 ,  H04Q11/04

Abstract: A PCM switching unit, adapted to carry out the insertion of a word into a PCM channel, the transfer of a word from a PCM channel or from the switching unit control memory towards the control unit, and the extraction of a channel, in particular channel 0, from one or more PCM channels. These modes of operation are carried out by using a bidirectional data bus, for the interconnection between the switching unit and the control unit, which may be a microprocessor.

公开(公告)号：DE3165744D1

公开(公告)日：1984-10-04

申请号：DE3165744

申请日：1981-05-12

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BELFORTE PIERO ,  BOSTICA BRUNO ,  PILATI LUCIANO

IPC: H04Q3/52 ,  H04Q11/04 ,  H04Q11/08

Abstract: The present PCM switching element is intended to be used in digital telephone exchanges for the making of switching or concentration stages of whatever capacity. … In fact, structures consisting of a plurality of such elements are easily performed thanks to use of a bit associated with each outgoing PCM channel, called "busy bit". … The switching element can be controlled by a commercially available microprocessor and can be made as an integrated circuit.

公开(公告)号：DE3162066D1

公开(公告)日：1984-03-08

申请号：DE3162066

申请日：1981-02-16

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BELFORTE PIERO ,  BORTIGNON RENZO

IPC: H04M3/26 ,  H04J3/14 ,  H04Q11/04

公开(公告)号：CA1155241A

公开(公告)日：1983-10-11

申请号：CA371285

申请日：1981-02-19

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BELFORTE PIERO ,  BORTIGNON RENZO

IPC: H04M3/26 ,  H04J3/14 ,  H04Q11/04

Abstract: A diagnostic circuit for PCM connection networks comprises a selector followed by a series-to-parallel converter, designed to select the PCM group containing the channel to be tested, and to transfer in parallel the eight bits of the channel to a network control processor, and a logic network that decodes messages and commands from the processor and controls the bit pick-up and transfer in correspondence within a predetermined frame. The whole circuit is manufactured as an integrated circuit and is suitable for direct dialogue with a microprocessor.

公开(公告)号：FR2377732A1

公开(公告)日：1978-08-11

申请号：FR7800543

申请日：1978-01-10

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BELFORTE PIERO

IPC: H04L5/14 ,  H04B1/40

Abstract: Two stations of a telecommunication system, interconnected by a single two-way signal link, have respective signal transmitters each working into an impedance network with a first branch connected to the two-way link and a second branch forming a voltage divider. Each station also has a signal receiver energized through a comparator which recovers the incoming signal from a composite signal present at a junction point between the two-way link and the first network branch by subtracting a balancing signal, available at the voltage divider, from this composite signal. The comparator may comprise a differential amplifier or a digital subtractor.