The Sun Fire 280R platform comes with a Sun Gigaswift Ethernet network interface card pre-installed in the PCI-1 slot. The Avaya IR system does not require use of this card to perform properly on the 280R platform. However, you can use the card to improve performance for features that require heavy LAN traffic.
To configure the Gigaswift card installed on the Sun Fire 280R, see Sun GigaSwift Ethernet Adapter Installation and User's Guide. This document and the release notes for the Gigaswift card are available at