Reference Guide for the Model GA620 Gigabit Ethernet Card
1-2 Introduction
Features
The key features of the Model GA620 Gigabit Ethernet Card are:
• Full-duplex operation (2,000 Mbps: 1,000 Mbps each way) with DMA (Direct Memory
Access) Gigabit Ethernet interface (IEEE 802.3z)
• Duplex SC fiber connector for 62.5-micron or 50-micron multimode fiber
• Interoperability with existing Ethernet and Fast Ethernet equipment assuming standard
Ethernet minimum and maximum frame size (64 to 1518 bytes), frame format, and compliance
with the following standards and protocols:
– Gigabit Ethernet (IEEE 802.3z)
– Logical Link Control (IEEE 802.2)
– Flow Control (IEEE 802.3x)
A fiber switch (for example, the NETGEAR Model FS509 Fast Ethernet Switch) or a buffered
repeater meets the criteria for interoperability with the Model GA620 Gigabit Ethernet Card.
• Standard Ethernet frame size (up to 1,518 bytes)
• Adaptive interrupt frequency
Adaptive interrupt frequency minimizes CPU utilization, therefore maximizing PCI bus and
network throughput.
• 33/66 MHz, 32-bit PCI bus master (Local Bus Revision 2.1 compliant) with adaptive DMA
channels
The Model GA620 Gigabit Ethernet Card operates normally when plugged in a 64-bit PCI slot
to deliver a 32-bit performance. The PCI interface on the card contains two independent DMA
channels for simultaneous read and write operations. As a bus master, the network card
requests access to the PCI bus instead of waiting to be polled.
• Software driver support for Microsoft
Windows NT
4.0, and Novell NetWare 4.1X
• Universal dual-voltage signaling (3.3 V and 5 V)
• Five-year warranty
• Toll-free telephone support
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