Rate-matched cell identification and modification, replacement,

Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network

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Details

370236, 370250, 370253, 370397, 370401, H04J 314, H04L 1256

Patent

active

057646260

ABSTRACT:
A test instrument for monitoring operation of ATM communication networks is capable of identifying individual cells passing through a node to which the instrument is connected as belonging to a particular virtual connection, and transmitting test cells replacing the identified cells, transmitting modified identified cells, or augmenting cells transmitted over the identified virtual connection with operations, administration, and maintenance cells. Specific test cells can be detected by a second test instrument connected to a node elsewhere in the network for accurately monitoring specific network operating characteristics. Cell delay, cell delay variation, cell error rates, and the like may all be monitored by the test instrument according to the invention.

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