Patent JPS5642992B2 successfully refreshed from Google Patents.
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EP0425145A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for providing real-time switching of high bandwidth transmission channels
Assignee: AT&T Inc
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Filing: 1990-10-12
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Granted: —
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Expires: 2010-10-12
Abstract
Abstract Broadband terminals, such as video terminals and a video conferencing system, are directly connected to broadband digital access crossconnect systems and connections between the terminals are established via the crossconnects and DS1 or DS3 interconnecting links under control of telephone exchanges associated with the different crossconnects. A broadband terminal is connected to an associated exchange, as well as, a crossconnect and a connection from one terminal to another may be requested by transmitting a special request code to the exchange together with a directory number assigned to the desired broadband terminal. The central office, on the basis of the directory number, area code and exchange code, selects a broadband interconnecting link from the crossconnect to which the originating terminal is connected to the crossconnect to which the terminating terminal is connected. Furthermore, the originating exchange transmits the identity of the selected link and the directory number via a common channel signaling system to the exchange associated with the requested terminal. Both the originating and terminating exchanges transmit connect messages to their associated crossconnects to establish a broadband path between the two terminals.
Inventors
- 👤 Robert Clayton Lee
- 👤 James Michael Leighton
- 👤 Gerard Peter O'reilly
- 👤 Donald Edward Smith
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:29
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0478; H04J; H04J2203/00; H04J2203/0001; H04J2203/0064
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
230 words
In a telecommunications system, an arrangement for providing a switched broadband connection, comprising: at least one telephone exchange; at least one broadband interconnection device; means for transmitting to said exchange a connection request message from a broadband terminal connected to said device; and means for transmitting control commands from said exchange to said device; said device comprising terminal ports for connection to broadband terminals, link ports for connection to broadband interconnection links to other broadband interconnection devices and port interconnection means responsive to control commands for selectively establishing interconnecting paths between ports defined by said control commands; said exchange responsive to a connection request from a terminal connected to one of said terminal ports, for selecting one of said link ports for connection to another interconnection device and for transmitting to said at least one device a control command defining said one of said terminal ports and said selected one of said link ports; said port interconnection means responsive to said control command for establishing a path from said one of said terminal ports to said selected one of said link ports; whereby a telephone exchange connected to a broadband interconnection device is responsive to a request from a broadband terminal connected to said connected device to select an interswitch link between broadband interconnection devices and to control the connected device to establish the required connections to the selected link.
Claim 2
Dependent Claim
230 words
In a telecommunications system, an arrangement for providing a switched broadband connection, comprising: at least one telephone exchange; at least one broadband interconnection device; means for transmitting to said exchange a connection request message from a broadband terminal connected to said device; and means for transmitting control commands from said exchange to said device; said device comprising terminal ports for connection to broadband terminals, link ports for connection to broadband interconnection links to other broadband interconnection devices and port interconnection means responsive to control commands for selectively establishing interconnecting paths between ports defined by said control commands; said exchange responsive to a connection request from a terminal connected to one of said terminal ports, for selecting one of said link ports for connection to another interconnection device and for transmitting to said at least one device a control command defining said one of said terminal ports and said selected one of said link ports; said port interconnection means responsive to said control command for establishing a path from said one of said terminal ports to said selected one of said link ports; whereby a telephone exchange connected to a broadband interconnection device is responsive to a request from a broadband terminal connected to said connected device to select an interswitch link between broadband interconnection devices and to control the connected device to establish the required connections to the selected link.
Claim 3
Dependent Claim
29 words
The arrangement in accordance with claim 1 wherein said exchange has a plurality of subscriber lines connected thereto and said means for transmitting comprises one of said subscriber lines.
Claim 4
Dependent Claim
203 words
The arrangement in accordance with claim 1 and further comprising an additional exchange and an additional broadband interconnection device connected to said additional exchange; said additional device comprising a terminal port for connection to a broadband terminal and a link port for connection to a broadband link interconnecting said at least one device and said additional device and port interconnection means responsive to control commands for selectively establishing an interconnecting path between said terminal port of said additional device and said link port of said additional device; and wherein said at least one exchange is further responsive to said connection request to transmit to said additional exchange information defining said selected link and terminal identity information defined by said request message, to said additional exchange; said additional exchange responsive to said information transmitted by said at least one exchange to transmit to said additional device a connect command identifying said terminal port of said additional device and said link port of said additional device; and said port interconnection means of said additional device responsive to said connect command from said additional exchange to establish an interconnecting path between said terminal port of said additional device and said link port of said additional device.
Claim 5
Dependent Claim
52 words
The arrangement in accordance with claim 3 and further comprising a signaling interconnection system for interconnecting said at least one exchange and said additional exchange and wherein said at least one exchange transmits said information defining said selected link and said terminal identity information to said additional exchange via said signaling system.
Claim 6
Dependent Claim
62 words
The arrangement in accordance with claim 4 further comprising originating and terminating terminal equipment and broadband data links connecting said originating and terminating terminal equipment to said at least one and said additional devices, respectively; said originating terminal equipment further comprising signaling means for connection to said at least one exchange for transmitting said connection request to said at least one exchange.
Claim 7
Dependent Claim
46 words
The arrangement in accordance with claim 5, wherein said signaling means in said originating terminal equipment comprises a subscriber line connected to said at least one exchange and means for transmitting a special code signifying a request for broadband services to said at least one exchange.
Claim 8
Dependent Claim
202 words
The arrangement in accordance with claim 3, wherein said at least one exchange comprises memory means for storing data defining the identity of one or more interconnecting links interconnecting said at least one device and said additional device, and processor means responsive to a connection request from said terminal connected to said one port including a directory number defining a destination terminal and including a code identifying said additional exchange, to select on the basis of said code identifying said additional exchange an interconnecting link between said at least one device and said additional device from links identified by data stored in said memory means and for including at least one part of said directory number in said information transmitted to said additional exchange; said additional exchange comprising memory means for storing data defining a terminal port in association with said at least one part of directory number and a link port associated with said information defining said selected link, and processor means responsive to said information transmitted to said additional exchange to transmit to said additional device a connect message including data defining said terminal port and said link port identified by data in said memory means of said additional exchange.
Claim 9
Dependent Claim
224 words
In a telecommunication system comprising a plurality of telephone exchanges and a plurality of broadband interconnection devices interconnected by a plurality of broadband transmission links, and each of said devices connected to at least one of said exchanges, a method of completing a connection between broadband terminals connected to said devices comprising the steps of: receiving a connection request at a first one of said exchanges from a first terminal connected to a first one of said devices, representing a request for interconnection of said one terminal and a second terminal defined in said request and connected to a second one of said devices; in response to said connection request, selecting in said first exchange an interconnecting link interconnecting said first and said second devices; transmitting information identifying said second terminal and said selected link from said first to said second exchange; transmitting a connect command from said first exchange to said first device defining connections to said first terminal and to said selected interconnecting link; transmitting a connect command from said second exchange to said second device defining connections to said second terminal and said interconnecting link; and establishing an interconnecting path between said first terminal and said selected interconnecting link in said first device and establishing an interconnecting path between said selected interconnecting link and said second terminal in said second device.
Claim 10
Dependent Claim
224 words
In a telecommunication system comprising a plurality of telephone exchanges and a plurality of broadband interconnection devices interconnected by a plurality of broadband transmission links, and each of said devices connected to at least one of said exchanges, a method of completing a connection between broadband terminals connected to said devices comprising the steps of: receiving a connection request at a first one of said exchanges from a first terminal connected to a first one of said devices, representing a request for interconnection of said one terminal and a second terminal defined in said request and connected to a second one of said devices; in response to said connection request, selecting in said first exchange an interconnecting link interconnecting said first and said second devices; transmitting information identifying said second terminal and said selected link from said first to said second exchange; transmitting a connect command from said first exchange to said first device defining connections to said first terminal and to said selected interconnecting link; transmitting a connect command from said second exchange to said second device defining connections to said second terminal and said interconnecting link; and establishing an interconnecting path between said first terminal and said selected interconnecting link in said first device and establishing an interconnecting path between said selected interconnecting link and said second terminal in said second device.
Claim 11
Dependent Claim
63 words
The method in accordance with claim 8 wherein said step of selecting includes executing in said first exchange the step of choosing a first link from a plurality of interconnecting links between said first and said second devices and the step of determining the availability of the first chosen link and choosing an alternate link if the first chosen link is not available.
Claim 12
Dependent Claim
82 words
The method in accordance with claim 9 wherein said method further includes the step of storing in said exchange data defining the availability of interconnecting links from said first device to said second device and the step of updating said table each time a link is selected or released, and wherein said step of choosing a link from a plurality of interconnecting links includes the step of reading said table to determine availability of individual links of said plurality of interconnecting links.
Claim 13
Dependent Claim
103 words
The method in accordance with claim 8 wherein the method, before the step of receiving a connection request, includes the step of transmitting from said first terminal to said first exchange a connection request message including information identifying said second terminal and said second exchange, and wherein said step of selecting comprises selecting an interconnecting link on the basis of said information identifying said second exchange and said step of transmitting information from said first to said second exchange includes transmitting a message via an interexchange signaling network wherein the address associated with the message corresponds to said information identifying said second exchange.
Claim 14
Dependent Claim
79 words
The method in accordance with claim 8 wherein said step of transmitting a connect command from said first exchange to said first device is executed prior to the step of transmitting the information from said first to said second exchange and further includes the step of transmitting a response message from said first device to said first exchange and repeating the step of selecting an interconnecting link if the response message indicates that a previously selected link is unavailable.
References Cited (Backward Citations)
No citation records indexed.
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