Methods and apparatus for increasing the number of UTOPIA ports in an ATM device
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United States of America Patent
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N/A
Issued Date -
Nov 6, 2003
app pub date -
Apr 30, 2002
filing date -
Apr 30, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Methods for increasing the number of UTOPIA ports in an ATM device include multiplexing data for a plurality of UTOPIA PHY ports over a first UTOPIA PHY port and providing backpressure information to the ATM device via a second UTOPIA PHY port. The backpressure information is preferably formatted in a single 56-byte UTOPIA cell. The presently preferred apparatus includes a sixty-four port UTOPIA Level 2 interface for coupling to up to sixty-four PHY devices, a two port UTOPIA Level 2 interface for coupling to the ATM device, and various buffers and controllers for controlling the flow of data between the two UTOPIA Level 2 interfaces. One of the ports in the two port UTOPIA Level 2 interface is used for configuration and control and the other is used for data.
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