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Specifications and

Cabling Requirements

This appendix lists the specifications, standards conformance, cable requirements, and

connector pin assignments for the 3Com 10/100 Secure (3CR990B) NIC.

3CR990B-97 NIC Specifications

The following table provides environmental, interface, and standards information for the

3CR990B-97 NIC.

Hardware

Memory 128 KB external RAM

Bus interface PCI Local Bus Specification, Revision 2.2

PCI master Supports bus master scatter-gather DMAs.

Dimensions Length: 13.31 cm (5.24 in)

Height: 8.51 cm (3.35 in)

Power requirement +5 V ±5% operating 1.26A maximum for normal operation

(375 mA for low power mode)

Network Interface

10 Mbps Ethernet 10BASE-T

Ethernet IEEE 802.3 industry standard for a 10 Mbps

baseband CSMA/CD local area network

100 Mbps Ethernet 100BASE-TX

Ethernet IEEE 802.3u industry standard for a 100 Mbps

baseband CSMA/CD local area network

Environment

Operating temperature 32

° to 158° F (0° to 70° C)

Storage temperature –22

° to 194° F (–30° to 90° C)

Operating humidity 10 to 90% noncondensing

Storage humidity 10 to 90% noncondensing

Altitude –300 to 3,000 m (–984 ft to 9,840 ft)

Standards Conformance

• IEEE 802.3 10BASE-T

• IEEE 802.3u 100BASE-TX

• IEEE 802.3x full-duplex, auto

negotiation, and flow control

• IEEE 802.1p (General Attribute

Registration protocol) for

multicast addresses

• IEEE 802.1Q VLAN Tagging

• Microsoft PC97

• Microsoft PC98

• Microsoft PC99

• PCI 2.1 and 2.2

• DMI 1.0 and 2.0

• ACPI 1.0

• SMBus 2.2

• WBEM, CIM, WMI

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