发明名称 Protocol integrating videotex communication system.
摘要 A protocol integrating videotex communication system includes a group of data base centers (101, 102, 103) conforming to various presentation level protocol syntax (PLPS) of a videotex, a plurality of subscriber's terminals (112, 113, 116) conforming to PLPS corresponding to the group of data base centers, and a device for interconnecting the group of data base centers conforming to the various PLPS and the plurality of subscriber's terminals, which includes a gateway unit (104) connected to the plurality of data base centers, a videotex communication control apparatus (105, 106 - 109) connected to the gateway unit, and an interconnection unit having a single ISDN exchange apparatus (110, 111) for connecting the videotex communication control apparatus to the plurality of subscriber's terminals.
申请公布号 EP0332184(A2) 申请公布日期 1989.09.13
申请号 EP19890104149 申请日期 1989.03.09
申请人 HITACHI, LTD. 发明人 GOTO, HIROSHI;SHIBATA, YOJI
分类号 H04N7/173;H04L12/00;H04M11/08 主分类号 H04N7/173
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