Multiplex communications – Wide area network – Packet switching
Patent
1982-11-30
1984-12-11
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
179 2DP, H04Q 1104
Patent
active
044882874
ABSTRACT:
The present invention discloses a data partitioning technique wherein the PCM speech transmission data field is utilized to contain both digitized speech (for example, from a telephone) and other data (for example, from a data terminal) in the same channel within a frame having a plurality of channels e.g. 32 channels, of information. This enables the speech and data to be combined in a common information field and simultaneously transmitted in the same channel, frame by frame, through a digital switching network to other system users. Also, in accordance with the present invention, system users can individually selectively access a data base system through the switching network, such that the same information can be broadcast from the database system to a plurality of system users, or such that different information can be accessed in the database system by a plurality of system users and simultaneously transmitted to different users in different channels. A novel technique for transmitting information from the database system via a telecommunication systems tone bus interconnecting the system is described.
REFERENCES:
patent: 3790715 (1974-02-01), Inose et al.
patent: 3889063 (1975-06-01), Slavin
patent: 4381427 (1983-04-01), Cheal et al.
patent: 4394757 (1983-07-01), Muzumdar et al.
patent: 4402073 (1983-08-01), Hammond
patent: 4403322 (1983-09-01), Kato et al.
Carter Nicholas J. R.
Das Santanu
Middleton Francisco A.
Chin Wellington
International Telephone and Telegraph Corporation
Morris Jeffrey P.
O'Halloran John T.
Olms Douglas W.
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