Remote loopback apparatus and method for telephone line repeaters
AssigneeSiemens Stromberg-Carlson
InventorsKarl A. Kelsey, Romuald Bailey
Life of this patent
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Abstract
A loopback enabled by an instruction and address code pair transmitted with the regular data stream affords a simplified fault location scheme for a T1 repeater span. By selecting unique addresses for each repeater using a predetermined frame sequence and by testing for logic error density, erroneous enablement is avoided.
Claims36
A repeater having a unique address designation, comprising:
- means, responsive to inchannel signals, for detecting at least one inchannel code sequence, where at least one inchannel code sequence is representative of the unique address designation;
- and
- means, responsive to the means for detecting, for initiating a loopback in the repeater.
An apparatus for initiating a loopback in a remotely-addressable repeater on a transmission line, the repeater having a unique address designation and being responsive to inchannel signals, comprising:
- at least one means, responsive to the inchannel signals, for detecting at least one inchannel code sequence, where at least one inchannel code sequence is representative of the unique address designation;
- and
- means, responsive to the means for detecting, for initiating a loopback in the repeater.
A system for conveying signals, comprising:
- first path means for conveying signals;
- second path means for conveying signals;
- a plurality of remotely addressable means for repeating, each means for repeating having a unique address designation and being connected to the first and second path means, and comprising:
- means, responsive to inchannel signals for detecting at least one inchannel code sequence, where at least one inchannel code sequence is representative of the unique address designation;
- and
- means, responsive to the means for detecting, for transferring a signal received on one of the path means to the other of the path means through the means for repeating.
A method for initiating a loopback in response to inchannel signals in a repeater system comprising a plurality of repeaters distributed along a transmission line of first and second data lines, where each repeater has a unique address designation and the repeater has a pair of repeater modules, each repeater having a selectively-enabled loopback path for interconnecting the pair of repeater modules independently of the data lines, comprising the steps of:
- detecting at least one inchannel code sequence, where at least one inchannel code sequence is representative of the unique address designations;
- and
- in response to the detection of the inchannel code sequence, initiating a loopback in the repeater.
A system for conveying signals, comprising:
- a transmission line comprising first and second data lines;
- and
- a plurality of remotely addressable repeaters connected to the transmission line, each repeater having a unique address designation and comprising:
- a pair of repeater modules;
- a detector, connected to the repeater modules, for detecting at least one inchannel code sequence, where at least one inchannel code sequence is representative of the unique address designation of the repeater;
- and
- a loop-back switch, responsive to the detector, for interconnecting the repeater modules of the repeater independently of the transmission line.
Dependencies are inferred from the claim text.