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VirataLink PCI/ISA Adapter
VIRATAlink is a highly integrated, flexible ATM adapter, combining the
ATM25 physical layer, RISC microprocessor, 1 MB of DRAM and a PCI or ISA bus
The embedded RISC processor controls all aspects of the ATM line interface:
packet segmentation and re-assembly, rate pacing, flow control, link
management, and signalling. This innovative design minimizes the load
placed on the PCs CPU - an important benefit, in view of ever more demanding
CBR cell pacing is performed using the ATM Forum GCR (Generic Cell Rate) algorithm. ATM signalling
conforms to the standard Q.2931 protocol. The ATM25 physical layer operates at 25.6 Mbps full duplex.
Existing 10Base-T wiring can be used for distances up to 100m over Unshielded Twisted Pair
category-3 (UTP-3) links.
PC drivers are provided to support data traffic from existing applications and protocol stacks. PC
applications can make direct use of ATM/AAL5 through an API providing ATM specific extensions to
the Winsock 1.1 and Winsock 2 API. VIRATAlink has a standard PC/AT form factor.
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