Data transmission network interface unit
First Claim
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1. A high speed microwave data transmission network, said network comprising, in combination:
- data carrying and translating means compatible with both private line and switched circuit data systems,an elongated microwave backbone trunk forming a signal carrier as part of said data carrying means,a plurality of separate, parallel local data distribution channels, a plurality of digital interfacing units, a hierachy included in said data translating means and including a plurality of successively positioned, signal translating MUX groups, wherein each of said MUX groups has a higher data bit timewise capacity than its predecessor MUX,at least one of said channels coacting with at least one of said digital interfacing units and with at least one of said MUX groups,at least one of said interface units including a first separate logic circuit means for translating data in said one channel into output translated data,and a second logic data translating circuit means, connected to each of said first logic coacting channels.
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Abstract
Disclosed is a data transmission network having an improved interface unit for matching the network to local subscriber loops. It is particularly constructed for the translation of supervisory signals in private and switched line systems. A switched channel logic circuit comprising an assembler and parallel to serial converter is provided for each data channel and these circuits connect to a common logic circuit comprising a combiner in the form of a shifter and a matrix of shift registers.
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Citations
13 Claims
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1. A high speed microwave data transmission network, said network comprising, in combination:
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data carrying and translating means compatible with both private line and switched circuit data systems, an elongated microwave backbone trunk forming a signal carrier as part of said data carrying means, a plurality of separate, parallel local data distribution channels, a plurality of digital interfacing units, a hierachy included in said data translating means and including a plurality of successively positioned, signal translating MUX groups, wherein each of said MUX groups has a higher data bit timewise capacity than its predecessor MUX, at least one of said channels coacting with at least one of said digital interfacing units and with at least one of said MUX groups, at least one of said interface units including a first separate logic circuit means for translating data in said one channel into output translated data, and a second logic data translating circuit means, connected to each of said first logic coacting channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 13)
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- 9. A data transmission network comprising a plurality of local distribution channels, a microwave backbone trunk, a multiplexer hierarchy coupling said local distribution channels to said backbone trunk, said hierarchy comprising first, second and third level combination multiplexer/demultiplexers, a time division switch coupled between said second and third level multiplexer/demultiplexers, at least some of said local distribution channels including modems, an interface unit coupling said modem channels to said first level multiplexer/demultiplexer, said interface unit comprising a channel logic circuit for each modem channel and a common logic circuit for all said modem channels coupled to said channel logic circuits, and a supervisory input/output module coupling said common logic circuit to said first level multiplexer/demultiplexer.
Specification