公开(公告)号：CA1072227A

公开(公告)日：1980-02-19

申请号：CA239446

申请日：1975-11-12

Applicant: IBM

Inventor： MARKEY HAROLD G ,  WEST LYNN P ,  METZ RALPH J ,  FLEMMING DONALD C ,  PARKER BRIAN E

IPC: H04B7/185 ,  H04J3/00 ,  H04J3/06

Abstract: ACCESS METHOD AND STATION APPARATUS FOR COMPRESSED HANDLING OF DIGITAL VOICE AND DATA SIGNALS RELATIVE TO A HIGH SPEED TDMA FACILITY Apparatus is provided for a multiplex switching station which has access to a time division multiplex (TDM) communication facility. The apparatus includes means for acquiring access to a number of real TDM channels in the facility. Means containing storage locations representative of virtual channels of communication relative to the facility are also provided. Communication is established between selected virtual channels and acquired real channels and a varying connection association is established between selected virtual channels and selected access ports of the apparatus. The means for transmitting and receiving voice and data traffic in digital TDM form between the ports and real channels is defined by the connection paths determined by association of the virtual and real channels and the virtual channels and the access ports.

公开(公告)号：FR2296976A1

公开(公告)日：1976-07-30

申请号：FR7540398

申请日：1975-12-29

Applicant: IBM

Inventor： PARKER BRIAN E ,  WEST LYNN P

IPC: H04J3/00 ,  H04B7/15 ,  H04B7/185 ,  H04B7/212 ,  H04J3/24 ,  H04M3/00 ,  H04Q11/00 ,  H04Q11/04 ,  H04L5/26 ,  H04J6/00

Abstract: Modular digital exchange terminals linked in a network by earth satellite provide coordinated multiplex switching and activity compression between line circuits and satellite time division channels. The line circuits carry digital data and digitalized voice telephone information into and out of the network. Nodal access modules (NAU's) interface to the satellite radio equipment. Branch exchange modules (NCU's) link line circuits switchably to a nodal access module through time division channels of subsidiary digital communication links. In transit up-link (to satellite time division channels) information is switched between lines and NCU buffer stores (virtual channels), selectively assigned by activity compression to time channels on associated digital links (each link accommodating only a fraction of the virtual traffic capacity of the associated stores), and transmitted to the NAU. In the NAU the activity compressed composite is time-concentrated with traffic of other digital links (in NAU buffer storage), and passed out on demand assigned satellite time division (traffic burst) channels. In downlink distribution to outlet line circuits the receiving NAU picks out from the interleaved network composite only the information channels destined for its outlet line circuits. These are stored, reordered in space/time associations with digital link time channels and activity compressed into associated digital link channels. The receiving NCU buffers and switches the information through associated internal (virtual) channels to respective outlet line circuits (destinations).