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公开(公告)号：DE3171648D1
公开(公告)日：1985-09-12
申请号：DE3171648
申请日：1981-02-25
Applicant: IBM
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Patent Agency Ranking
公开(公告)号：DE3462648D1
公开(公告)日：1987-04-16
申请号：DE3462648
申请日：1984-05-25
Applicant: IBM
Inventor： BENSADON JOSEPH MARBURG , BRICKMAN NORMAN FREDERICK
Abstract: A system to provide X.21 in-band call establishment signaling in the data path of a TDMA data communication system by utilizing a data port (15), digital switch and telephone signaling call processor in a satellite communications controller. The system includes an X.21 signaling protocol between a data terminal equipment and the satellite communications controller on the terrestrial side and allows self-switched digital data port functions in lieu of associated voice port and line functions. The signaling rate is the same as the line data rate. The data port goes through three generalized states during a normal call process. The first general state is idle, the second general state is the signaling state and the third general state is the data transfer state. At the start of the signaling state, the call request input to the call processor is activated for the appropriate port. Call establishment signals are then processed through the digital switch and an X.21 adapter to the system's control processor (32). In the third data transfer state, the call establishment signaling has been completed and all data bits go through the digital switch and are transmitted to the digital interface. At the end of the call the data port goes back to the first, idle state. … The system allows for X.21 in-band signaling on the terrestrial side of the satellite communications controller so that a digital data port can accept X.21 in-band call processing type signals. The digital data port detects the call processing type signals with the X.21 protocol and passes them on to the X.21 adapter in the satellite communications controller.
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3.发明专利
公开(公告)号：DE3573696D1
公开(公告)日：1989-11-16
申请号：DE3573696
申请日：1985-03-07
Applicant: IBM
Inventor： BENSADON JOSEPH MARBURG
Abstract: A mechanism is disclosed for a time division multiple access communications network, to enable the synchronizing of traffic messages between a transmitting and a receiving node. A transmit clock mechanism at the transmitting node includes a slip counter for accumulating a slip count value during consecutive intervals of transmission. The slip count value is transmitted along with the traffic messages over the communications linkto the receiving node. Aslip count detector is located at the receiving node, for receiving the slip count value and adjusting the receive clock at the receiving node in response to the slip count value. In this manner, a timing slip adjustment which has been made at the transmitting node will have a corresponding timing slip adjustment imposed at the receiving node so as to maintain the proper synchronization between the sending and receiving stations during a time division multiple access communications session.
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公开(公告)号：DE3265857D1
公开(公告)日：1985-10-03
申请号：DE3265857
申请日：1982-09-16
Applicant: IBM
Inventor： BARNER ROBERT PAUL , BENSADON JOSEPH MARBURG , BESSEYRE JACQUES A , MARKEY HAROLD G
Abstract: A self-switched in-band signaling communication apparatus is disclosed which enables the switching of the signaling mode to the data mode on a single transmission line between a data terminal equipment or data communication equipment and the data port of a satellite communications controller, and the opposite switching from the data mode to the signaling mode under a single control bit. Signaling to and from the data port of the satellite communications controller is carried out using conventional dialing pulses at a signaling rate which is independent of the line data rate. The apparatus provides for the multipoint communication between a plurality of data terminal equipments using a unique multipoint turn-around process which provides a mobile bandwidth capability for the communications system.
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公开(公告)号：DE3170469D1
公开(公告)日：1985-06-20
申请号：DE3170469
申请日：1981-02-25
Applicant: IBM
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公开(公告)号：BR8402764A
公开(公告)日：1985-05-14
申请号：BR8402764
申请日：1984-06-07
Applicant: IBM
Inventor： BENSADON JOSEPH MARBURG , BRICKMAN NORMAN FREDERICK
Abstract: A system to provide X.21 in-band call establishment signaling in the data path of a TDMA data communication system by utilizing a data port (15), digital switch and telephone signaling call processor in a satellite communications controller. The system includes an X.21 signaling protocol between a data terminal equipment and the satellite communications controller on the terrestrial side and allows self-switched digital data port functions in lieu of associated voice port and line functions. The signaling rate is the same as the line data rate. The data port goes through three generalized states during a normal call process. The first general state is idle, the second general state is the signaling state and the third general state is the data transfer state. At the start of the signaling state, the call request input to the call processor is activated for the appropriate port. Call establishment signals are then processed through the digital switch and an X.21 adapter to the system's control processor (32). In the third data transfer state, the call establishment signaling has been completed and all data bits go through the digital switch and are transmitted to the digital interface. At the end of the call the data port goes back to the first, idle state. … The system allows for X.21 in-band signaling on the terrestrial side of the satellite communications controller so that a digital data port can accept X.21 in-band call processing type signals. The digital data port detects the call processing type signals with the X.21 protocol and passes them on to the X.21 adapter in the satellite communications controller.
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