Multi-Mode Optical Gigabit Fail-Open Kit includes items necessary to support optical gigabit fail-open for McAfee IntruShield 2600, IntruShield 3000, IntruShield 4000 or IntruShield 4010 GBIC ports. Kit includes Single-mode optical gigabit fail-open module, Compact Flash controller for IntruShield, Cable from Compact Flash Controller to single-mode optical gigabit fail-open module and rack-mounting hardware. This optional accessory kit is required to support fail-open capability on GBIC ports of IntruShield sensors. A single kit provides necessary components to support fail-open for single single-mode fiber network link (which utilizes two GBIC ports on the sensor). If customer requires fail-open on more than one link, additional kits should be ordered. NOTE: Supports all IntruShield sensor models.