EP0119843A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A system for linking channel group in digital communication network
Assignee: Fujitsu Ltd
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Filing: 1984-03-16
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Granted: —
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Expires: 2004-03-16
Abstract
Abstract In a system for linking channel groups (ch1A to ch4A; CONT(8), OTL(8), TTL(8), MTL(8)) from various data terminals (1) in a sending station (MC) to corresponding data terminals (7-2, TST2) in a receiving station (LS), via digital telephone switching networks (5, 6), orderly connection of channels maintaining space order and time phase relationships between the channels of the group is accomplished by providing group trunks (A, B) - so named by the inventors - in each terminal station (1 , 7-2), to connect the data terminals to the telephone network. A group trunk (A) establishes a necessary number of channels between the sending and receiving trunks (A, B). The group trunk (A) of the sending station provides each sent data item with a channel identification code, identifying the channel through which the data item is sent out. The group trunk (B) of the receiving terminal detects the channel identification codes of received data, then rearranges the order of established channel paths arriving at the receiving terminal, and equalizes delay times of data sent via the different channel paths, to establish the space order and time phase relationships.
Inventors
- 👤 Hiroshi Nakada
- 👤 Hisao Kawano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 14:01
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04L; H04L12/00; H04L12/50; H04L12/52; H04L12/525
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
268 words
A system for connecting a group of channels, in an ordered manner, between a terminal which is or is acting as a sending terminal and a terminal which is or is acting as a receiving terminal, via a digital communication network, comprising: sending terminal equipment, which is provided in the terminal which is or is acting as a sending terminal, operable to generate a plurality of data items at a time; receiving terminal equipment, which is provided in the terminal which is or is acting as a receiving terminal, operable to receive the plurality of data items; a digital communication network which includes a digital data transmission network and a digital data switching network, operable to link the terminals; each of the terminals having a respective group trunk comprising - means for originating or terminating a call signal assigned to the group trunk of the terminal which is or is acting as a receiving terminal, accordingly as the terminal in which the means is provided is or is acting as a sending terminal or a receiving terminal, means for providing a channel identification signal for each data item sent out from sending terminal equipment when the terminal in which the trunk is provided is or is acting as a sending terminal, means for distinguishing channel identification signals from received data items when the terminal in which the trunk is provided is or is acting as a receiving terminal; the group trunks being operable to control the space and time order of the plurality of data items arriving at the terminal which is or is acting as receiving terminal.
Claim 2
Independent Claim
268 words
A system for connecting a group of channels, in an ordered manner, between a terminal which is or is acting as a sending terminal and a terminal which is or is acting as a receiving terminal, via a digital communication network, comprising: sending terminal equipment, which is provided in the terminal which is or is acting as a sending terminal, operable to generate a plurality of data items at a time; receiving terminal equipment, which is provided in the terminal which is or is acting as a receiving terminal, operable to receive the plurality of data items; a digital communication network which includes a digital data transmission network and a digital data switching network, operable to link the terminals; each of the terminals having a respective group trunk comprising - means for originating or terminating a call signal assigned to the group trunk of the terminal which is or is acting as a receiving terminal, accordingly as the terminal in which the means is provided is or is acting as a sending terminal or a receiving terminal, means for providing a channel identification signal for each data item sent out from sending terminal equipment when the terminal in which the trunk is provided is or is acting as a sending terminal, means for distinguishing channel identification signals from received data items when the terminal in which the trunk is provided is or is acting as a receiving terminal; the group trunks being operable to control the space and time order of the plurality of data items arriving at the terminal which is or is acting as receiving terminal.
Claim 3
Dependent Claim
322 words
A system according to claim 1, wherein each group trunk comprises: a plurality of vertical channel paths for linking the group trunk to terminal equipment of the terminal in which the trunk is provided; a plurality of horizontal channel paths for linking the communication network and the group trunk; a controller (CNT), which includes a central processing unit (CPU) and a memory device (MEMO), operable to control the space and time orders of data signals arriving at the terminal in which the trunk is provided, when the terminal is or is acting as a receiving terminal, according to a program and data stored in the memory device; user terminal means (UTI) operable to transmit signals originating from user terminal equipments of the terminal in which the trunk is provided to the controller, when the terminal is or is acting as a sending terminal; serial data intumface means (SDI), connected with the plurality of horizontal channel paths, for providing serial data for these channel paths , controlled by the controller, operable in provide or to distinguish identification signals for data signals generated by sending terminal equipment accordingly as the terminal in which the trunk is provided is or is acting as a sending terminal or a receiving terminal; a plurality of line signal inserter and droppers (I/D), connected to the plurality of horizontal channel paths and controlled by the controller via the user terminal means, operable to originate or terminate a call signal assigned to a group trunk accordingly as the terminal in which the trunk is provided is or is acting as a sending terminal or a receiving terminal; and a gate switch network which is connected to the vertical and horizontal channel paths and comprises a plurality of gate switches provided respectively at the cross points of the vertical and horizontal paths, the gate switches being operable selectively to connect the vertical and horizontal paths under the control of the controller.
Claim 4
Dependent Claim
157 words
A system according to claim 2, wherein : the group trunk in the terminal which is or is acting as a sending terminal is operable to select from amongst its horizontal channel paths a required number of paths corresponding to the required number of vertical channel paths to be connected to sending terminal equipment, and to send the same call signal, assigned to a receiving group trunk, to each of the selected horizontal channel paths, through its line signal inserter and droppers (I/D)s under the control of its controller ; and the group trunk in the terminal which is or is acting as a receiving terminal, is operable to receive the call signals and to send back answer signals, to the terminal which is or is acting as the sending terminal, through its line signal inserter and droppers under control of its controller, and establishes the required number of channel paths between the sending and receiving terminals.
Claim 5
Dependent Claim
86 words
A system according to claim 2, wherein : the group trunk in the terminal which is or is acting as a receiving terminal is operable to distinguish channel identification signals from the data items received via its horizontal channel paths, by its serial data interface means,and its central processing unit is operable to control its gate switches by program stored in its memory device and in accordance with the received channel identification signals, to switch connections between its horizontal channel paths and its vertical channel paths.
Claim 6
Dependent Claim
75 words
A system according to claim 2, wherein each group trunk further comprises a phase equalizing means, including a plurality of variable shift registers (VSR) connected to its horizontal paths, the variable shift registers being operable to vary the delay time of received signals on the horizontal channel paths of the trunk under the control of the central processing unit of the trunk, to equalize transmission delay times for all of the channels of the group.
Claim 7
Dependent Claim
33 words
A system according to claim 2, wherein'the serial data interface means of each group trunk comprise a plurality of serial data interfaces connected respectively to the horizontal channel paths of the group trunk.
Claim 8
Dependent Claim
36 words
A system as claimed in claim 2, wherein the serial data interface means of each group trunk comprise a single serial data interface connected to a vertical path of the gate switch network of the trunk.
Claim 9
Dependent Claim
12 words
A group trunk for a system as claimed in any preceding claim.
References Cited (Backward Citations)
No citation records indexed.
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