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network
processor card
The main computational and storage resource for the
LightStream 2020 Asynchronous Transfer Mode (ATM) switch. Each LightStream 2020
switch has one or two NPs. The second card, if present, serves as a backup for
the first. Each NP is associated with a floppy disk drive for loading software
and a hard disk drive for storing software and configuration data. Each NP also
has an access card that provides an Ethernet port.
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