Abstract: An apparatus and method are disclosed for testing synchronization of transmission between systems operating at different clock rates. The apparatus includes a transmitting unit configured to operate at a first clock rate, and a receiving unit configured to operate at a second clock rate that is different from the first clock rate. A compensation circuit receives a second clock rate from a frequency generating system, and synchronizes the data transmitted by the transmitting unit with the second clock rate. The synchronized data is then transmitted to the receiving unit.

Abstract: An apparatus and method for synchronizing communication between systems having different clock rates, is described. The apparatus includes a communication unit, a synchronization unit, and an interface unit. The communication unit receives upstream information and generates a first sample stream representative of the upstream information based on a first clock rate. The synchronization unit converts the first sample stream to a second sample stream based on a second clock rate and in accordance with a predetermined burst plan. The interface unit receives the second sample stream at the second clock rate and outputs it based on the predetermined burst plan.

Abstract: An apparatus for inline monitoring of transmit signals is disclosed. The apparatus includes a processor, and one or more fiber optic lines for supplying a transmit signal to/from a remote transmission station. The processor is configured to receive input for selecting one or more fiber optic lines for examination, determine at least one property of the transmit signal to be monitored, and retrieve information corresponding to the at least one property for a predetermined period of time. The processor is further configured to output a visual representation of the retrieved information, perform an analysis of the retrieved information and the visual representation, and facilitate identification of at least one status associated with the transmit signal based, at least in part, on the analysis.

Abstract: An apparatus and method for synchronizing communication between systems having different clock rates, is described. The apparatus includes a communication unit, a synchronization unit, and an interface unit. The communication unit receives upstream information and generates a first sample stream representative of the upstream information based on a first clock rate. The synchronization unit converts the first sample stream to a second sample stream based on a second clock rate and in accordance with a predetermined burst plan. The interface unit receives the second sample stream at the second clock rate and outputs it based on the predetermined burst plan.

Abstract: An apparatus and method are disclosed for testing synchronization of transmission between systems operating at different clock rates. The apparatus includes a transmitting unit configured to operate at a first clock rate, and a receiving unit configured to operate at a second clock rate that is different from the first clock rate. A compensation circuit receives a second clock rate from a frequency generating system, and synchronizes the data transmitted by the transmitting unit with the second clock rate. The synchronized data is then transmitted to the receiving unit.

Abstract: An apparatus for inline monitoring of transmit signals is disclosed. The apparatus includes a processor, and one or more fiber optic lines for supplying a transmit signal to/from a remote transmission station. The processor is configured to receive input for selecting one or more fiber optic lines for examination, determine at least one property of the transmit signal to be monitored, and retrieve information corresponding to the at least one property for a predetermined period of time. The processor is further configured to output a visual representation of the retrieved information, perform an analysis of the retrieved information and the visual representation, and facilitate identification of at least one status associated with the transmit signal based, at least in part, on the analysis.

Abstract: Compression and decompression methods for transmitting facsimile images in which the facsimile image is compressed in both vertical and horizontal directions are implemented using two dimensional maximum differences algorithms. Asymmetrical and fractional image compression are provided by controlling the number of lines, i.e., rows or columns, being compressed and by controlling the bit segment length used during each differences determination. The compressed facsimile image is decompressed by selecting a reference bit in the decompressed facsimile image and expanding the bit in both vertical and horizontal directions in accordance with a binary value of bits near the selected reference bit. A transmission channel adapted to serially perform the encoding and decoding functions is also described.