Firmware download from a remote terminal to an optical network terminal in a digital loop carrier system
First Claim
1. A multiplexing communications system comprising:
- a first terminal means for transmitting and receiving user digitized data,a second terminal means for transmitting and receiving said user digitized data, andcommunications link means for conveying said user digitized data in either direction between said first terminal means and second terminal means, said communication link means comprising;
a plurality of user channels for conveying said user digitized data, and at least one overhead channel capable of conveying a first signal, wherein said first signal may be transmitted by either of said first download means or second download means for reception by either of said second download means or said first download means, said first signal being transmitted for initiating the transmission of said digital control data from said first terminal means to said second terminal means via at least some of said user channels,said first terminal means comprisingdigital control data for controlling said second terminal means, andfirst download means for transmitting said digital control data to said second terminal means via said communications link means;
said second terminal means comprisingmemory means for storing said digital control data,control means for controlling said second terminal means during its normal transmitting and receiving operations, said control means requiring said digital control data to be accessible from said memory means, andsecond download means for receiving said digital control data from said first download means via said communications link means.
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Accused Products
Abstract
A multiplexing communications system comprising a first terminal means for transmitting and receiving user digitized data, a second terminal means for transmitting and receiving the user digitized data, and a communications link means for conveying the user digitized data in either direction between the first terminal means and the second terminal means. The first terminal means maintains a copy of digital control data which is necessary for controlling the second terminal means. The first terminal means has first download means for transmitting this digital control data to the second terminal means via the communications link means. The second terminal means contains a memory means for storing the digital control data, and control means for controlling the second terminal means during its normal transmitting and receiving operations. The control means requires that the digital control data be accessible from the memory means. The second terminal means also contains a second download means for receiving the digital control data from the first download means via the communications link means.
68 Citations
19 Claims
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1. A multiplexing communications system comprising:
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a first terminal means for transmitting and receiving user digitized data, a second terminal means for transmitting and receiving said user digitized data, and communications link means for conveying said user digitized data in either direction between said first terminal means and second terminal means, said communication link means comprising; a plurality of user channels for conveying said user digitized data, and at least one overhead channel capable of conveying a first signal, wherein said first signal may be transmitted by either of said first download means or second download means for reception by either of said second download means or said first download means, said first signal being transmitted for initiating the transmission of said digital control data from said first terminal means to said second terminal means via at least some of said user channels, said first terminal means comprising digital control data for controlling said second terminal means, and first download means for transmitting said digital control data to said second terminal means via said communications link means; said second terminal means comprising memory means for storing said digital control data, control means for controlling said second terminal means during its normal transmitting and receiving operations, said control means requiring said digital control data to be accessible from said memory means, and second download means for receiving said digital control data from said first download means via said communications link means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19)
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16. The system of claim wherein each of said download packets further comprises
a CRC16 field for detecting errors that occur in the transmission of said download packet from said first download means to said second download means.
Specification