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1.发明授权
公开(公告)号：US3914743A
公开(公告)日：1975-10-21
申请号：US30920772
申请日：1972-11-24
Applicant: BELL TELEPHONE LABOR INC
Inventor： FITCH SCOTT MCDOWELL , KOLENSKY LEO MICHAEL , PANEK JOSEPH CONRAD , RIFE DAVID CHARLES , SCHAEFER WALTER RUDOLPH
CPC classification number: H04L12/00
Abstract: A multipoint hub or junction unit has a main channel connected to a control station of a selective calling line and a plurality of branch lines, certain of the branch lines connected to downstream line stations and one branch line connected to a main channel of a downstream multipoint junction unit whose branches are connected to other line stations. Normally, downstream data signals from the control station are split by the hub and broadcast to all the branches, the signals to the downstream hub being split again. Upstream transmission on each branch is combined and propagates to the main line. The multipoint junction unit normally blocks upstream supervisory signals. When branch lines are to be tested, signaling equipment is connected into the main line and signals the hub to block all its branches, to select blocked branches to be tested and to unblock the selected branches to permit passage of upstream and downstream data and supervisory signals.
Abstract translation: 多点集线器或连接单元具有连接到选呼线路和多条分支线路的控制站的主通道，连接到下游线路站的某些分支线路和连接到下游多点的主通道的一条分支线路 分支连接到其他线路站的接线单元。 通常，来自控制站的下行数据信号由集线器分割并广播到所有分支，到下游集线器的信号再次被分离。 每个分支上的上行传输被组合并传播到主线。 多点连接单元通常阻止上行监控信号。 当要测试分支线路时，信号设备连接到主线路，并向集线器发出信号以阻止其所有分支，选择被阻止的分支，以解锁所选择的分支以允许上下游数据和监控信号通过 。
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2.发明授权Junction unit alternatively providing branch line broadcasting of data and branch line selection 失效交叉点单元交替地提供分支线广播数据和分支线选择
公开(公告)号：US3883690A
公开(公告)日：1975-05-13
申请号：US42633373
申请日：1973-12-19
Applicant: BELL TELEPHONE LABOR INC
Inventor： KOLENSKY LEO MICHAEL , PILC RANDOLPH JOHN , SCHAEFER WALTER RUDOLPH , WILLAND ALLAN HOWARD
Abstract: A symmetrical junction unit interconnects a plurality of branch lines which extend to line loops of data stations. Normally, data signals on any branch from the data station connected thereto are broadcast by the junction unit to all other branches and supervisory control signals are blocked. When it is desired to test a branch line, signaling equipment connected to one designated branch signals the junction unit to select the desired branch. The junction unit, in response thereto, permits the interchange of both data and control signals between the one designated branch and the selected branch and blocks all the unselected branches. In one embodiment, branch lines are arranged to accommodate half-duplex signaling during the normal mode and full-duplex signaling during testing.
Abstract translation: 对称连接单元将延伸到数据站的线路环的多个分支线互连。 通常，连接到其上的数据站的分支上的数据信号由连接单元广播到所有其他分支，并且监控信号被阻塞。 当需要测试分支线路时，连接到一个指定分支的信令设备发信号通知接线单元以选择所需分支。 结合单元响应于此，允许在一个指定的分支和所选择的分支之间交换数据和控制信号，并且阻止所有未选择的分支。 在一个实施例中，分支线路被布置成在测试期间在正常模式和全双工信令期间适应半双工信令。
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3.发明授权
公开(公告)号：US3869573A
公开(公告)日：1975-03-04
申请号：US44880774
申请日：1974-03-07
Applicant: BELL TELEPHONE LABOR INC
CPC classification number: H04L12/00
Abstract: A synchronous multipoint data network is formed by symmetrical junction units. Each junction unit provides signal paths that interconnect four two-way branch lines which extend to station line loops or are connected to branch lines of other junction units. Data signals from any branch are broadcast by the junction unit to all other branches. If data signals are simultaneously received from two branches, an exclusive two-way connection is formed therebetween. Other branches may then broadcast data signals to each other or form a second exclusive two-way connection. The junction unit also generates ''''idle'''' control words and sends them to branches when they are not receiving data signals.
Abstract translation: 同步多点数据网络由对称连接单元形成。 每个连接单元提供信号路径，其连接四个双向分支线，其延伸到站线路环路或连接到其他交界单元的分支线路。 来自任何分支的数据信号由连接单元广播到所有其他分支。 如果从两个分支同时接收数据信号，则在它们之间形成专用的双向连接。 然后，其他分支可以彼此广播数据信号或形成第二独占双向连接。 接线单元还产生“空闲”控制字，并在它们没有接收数据信号时将它们发送到分支。
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