EP0228204A2
Expired / Lapsed
EP
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Architecture for distributed control telecommunication switching systems
Assignee: AT&T Inc
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Filing: 1986-12-08
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Granted: —
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Expires: 2006-12-08
Abstract
Abstract In a distributed processing telecommunication switching system comprising a plurality of switching modules, the individual modules control substantially all telephone call control processing actions, including the selection of an available port of a multiport hunt group, without requiring the assistance of a central processor. Each module includes a processor, a plurality of ports connected to customer lines and interoffice trunks, a plurality of outlets for setting up intermodule connections, and a switching network for interconnecting ports and outlets within a module. The module processors communicate with each other by a high speed common data communication facility connected to all processors. This data communication facility is used for communicating intermodule call control messages and port availability data to allow port hunts to be accomplished without using a central processor.
Inventors
- 👤 Douglas Stuart Sand
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 14:39
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0407; H04Q2213/00; H04Q2213/13107; H04Q2213/13141; H04Q2213/13176; H04Q2213/13299
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
199 words
A distributed control telecommunication switching system for connection to a plurality of lines and trunks, comprising: a plurality of switching modules, each module comprising a plurality of ports for connection to said lines and trunks, a plurality of intermodule outlets, connection means operable for selectively setting up connections among ones of said ports and among ones of said ports and ones of said outlets, and module processor means for controlling connection operations of said connection means; means for selectively interconnecting outlets of different ones of said modules; a common data communication means connected to each of said module processor means for communicating data packets among each of said module processor means; and an administrative processor for communicating with a man machine interface; wherein each of said module processor means generates first data packets for communication over said common data communication means to others to said module processor means and is responsive to reception of said first data packets from others of said module processor means for controlling connection operations of said connection means; wherein said module processors collectively comprise substantially all software and data tables required for controlling intramodule and intermodule call connections substantially independently of said administrative processor.
Claim 2
Dependent Claim
199 words
A distributed control telecommunication switching system for connection to a plurality of lines and trunks, comprising: a plurality of switching modules, each module comprising a plurality of ports for connection to said lines and trunks, a plurality of intermodule outlets, connection means operable for selectively setting up connections among ones of said ports and among ones of said ports and ones of said outlets, and module processor means for controlling connection operations of said connection means; means for selectively interconnecting outlets of different ones of said modules; a common data communication means connected to each of said module processor means for communicating data packets among each of said module processor means; and an administrative processor for communicating with a man machine interface; wherein each of said module processor means generates first data packets for communication over said common data communication means to others to said module processor means and is responsive to reception of said first data packets from others of said module processor means for controlling connection operations of said connection means; wherein said module processors collectively comprise substantially all software and data tables required for controlling intramodule and intermodule call connections substantially independently of said administrative processor.
Claim 3
Dependent Claim
27 words
The switching system of claim 1 wherein said common data communication means concurrently transmits data from said administrative processor to a plurality of said module processor means.
Claim 4
Dependent Claim
50 words
The switching system of claim 1 wherein said administrative processor generates initialization data for communication over said common data communication means to a predetermined plurality of said module processor means and each of said predetermined plurality of module processor means receives said initialization data from said common data communication means.
Claim 5
Dependent Claim
34 words
The distributed control switching system of claim 1 in which said means for selectively interconnecting outlets comprises a time multiplex switch connected to predetermined ones of said outlets of pre-selected ones of said modules.
Claim 6
Dependent Claim
27 words
The distributed control switching system of claim 4 wherein said first data messages comprise data for selecting available outlets for use in setting up an intermodule call.
Claim 7
Dependent Claim
26 words
The distributed control switching system of claim 1 wherein said means for selectively interconnecting outlets substantially permanently interconnects outlets of predetermined ones of said switching modules.
Claim 8
Dependent Claim
27 words
The distributed control switching system of claim 6 wherein said first data messages comprise data for selecting available outlets for use in setting up an intermodule call.
Claim 9
Dependent Claim
56 words
The distributed control switching system of claim 1 wherein a subset of the ports of the system are categorized into groups, wherein members of one of said groups are distributed over a predetermined plurality of said modules and wherein one of said module processors stores status information of all ports in said one of said groups.
Claim 10
Dependent Claim
205 words
In a distributed control switching system comprising a plurality of modules each comprising a plurality of ports, said modules interconnected via a plurality of intermodule outlets connected to each of said modules, a common data communication means connected to each of said modules for transmitting data messages among said modules, and an administrative processor for communicating with a man-machine interface, a method of setting up a call between a source port and a destination port for communication with a destination station defined by a particular destination directory number, substantially without the use of said administrative processor or any other central processor, comprising the steps of: detecting a seizure from said source port in a first of said modules; receiving data representing said particular destination directory number; translating said particular destination directory number to find the identity of a second module containing a destination port for communicating with said destination station; sending a first message to said second module over said common communication medium, said first message comprising the identity of said destination port; and sending a second message to said first module over said common communication medium, said second message comprising the identity of an intermodule outlet from said second module to said first module.
Claim 11
Dependent Claim
205 words
In a distributed control switching system comprising a plurality of modules each comprising a plurality of ports, said modules interconnected via a plurality of intermodule outlets connected to each of said modules, a common data communication means connected to each of said modules for transmitting data messages among said modules, and an administrative processor for communicating with a man-machine interface, a method of setting up a call between a source port and a destination port for communication with a destination station defined by a particular destination directory number, substantially without the use of said administrative processor or any other central processor, comprising the steps of: detecting a seizure from said source port in a first of said modules; receiving data representing said particular destination directory number; translating said particular destination directory number to find the identity of a second module containing a destination port for communicating with said destination station; sending a first message to said second module over said common communication medium, said first message comprising the identity of said destination port; and sending a second message to said first module over said common communication medium, said second message comprising the identity of an intermodule outlet from said second module to said first module.
Claim 12
Dependent Claim
189 words
In a distributed control switching system wherein a subset of ports are grouped into a plurality of multiport hunt groups, all members of each group communicating with at least one destination station defined by at least one destination directory number, the method of claim 9 wherein the process of idle port hunting for each of said multiport hunt groups is assigned to a corresponding one of said modules, and wherein said step of translating comprises the steps of: translating said particular directory number to find the identity of the associated multiport hunt group; translating the identity of the multiport hunt group to find the identity of the corresponding hunting module for hunting for an available port in said multiport hunt group; sending, in response to said step of translating to find the identity of the corresponding hunting module, a message requesting a hunt for an available port in said multiport hunt group to said hunting module; and hunting in said hunting module for an available port in said hunting group and translating the identity of said hunted idle port to the identity of the module containing said idle port.
Claim 13
Dependent Claim
36 words
The method of claim 9 wherein said step of sending a first message further comprises the step of generating intermodule outlet availability data of said first module and including said availability data in said first message.
Claim 14
Dependent Claim
38 words
The method of claim 9 further comprising the step of: sending third messages from said administrative processor concurrently to a plurality of said module processors for initializing common data in each of said plurality of said module processors.
Claim 15
Dependent Claim
51 words
In a distributed control switching system further comprising an intermodule switching network for setting up connections between intermodule outlets of different ones of said modules, the method of claim 9 further comprising the step of: sending a third message comprising the identity of said intermodule outlet to said intermodule switching network.
References Cited (Backward Citations)
US4322843A
Cited
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