Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2007-12-04
2007-12-04
Patel, Ajit (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S541000
Reexamination Certificate
active
10421018
ABSTRACT:
A flexible and expandable system bus for connecting traffic mapping devices to SONET/SDH framing devices. The system bus passes control signals generated by a master device to multiple tributaries to orient them relative to a SONET/SDH frame. These control signals obviate the need for each tributary to perform its own SONET/SDH reconstruction and framing using the A1/A2 bytes. The control signals synchronize the tributaries to a common clock cycle, indicate during which clock cycles the tributary can add or drop data relative to the system bus, and an interface identification signal that transmits values on the system bus. The tributaries monitor the values on the system bus, and when the value associated with each tributary appears on the bus, and the system bus indicates that the current clock cycle is within the SPE portion of the SONET/SDH frame, the tributary adds or drops data relative to the system bus.
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Coakeley Matthew
Kirk David
Rida Nizar
Trounce Erik
Zorgdrager Ingrid
Nixon & Peabody LLP
Patel Ajit
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