April 2003
Intermediate to advanced
432 pages
11h 10m
English
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ATM Units
The ATM public network offers various traffic-measurement units to configure services. Of these units, only the peak cell rate is commonly used in today's DSL networks, but as DSL makes more use of the range of ATM definitions, the other units will become more applicable as well. The cell rates are as follows:
Peak cell rate (PCR)— The upper limit of the cell rate from the source. A user may encounter the cell burst rate (see below) as integrated services use the network. Cells in excess of the PCR rate could be discarded if the carrier needs the bandwidth.
Sustainable cell rate (SCR)— To prevent high cell loss, this rate identifies the maximum rate at which continuous cells can be issued without data loss. This value is lower than ...
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