Maintain dependable Gigabit Ethernet connectivity across multimode fiber with the AddOn BN-CKM-S-SX-AO SFP transceiver. Built for IBM networking platforms, this hot-swappable module supports 1000BASE-SX operation over MMF with an 850 nm wavelength and LC connectivity, reaching up to 550 m in the right fiber plant. For infrastructure teams managing mixed hardware lifecycles, this module offers a controlled path to replace or expand optical links without reworking the network design. Its TAA-compliant status supports public-sector and regulated procurement requirements, while the compatible form factor helps preserve the operational behavior expected from IBM environments. The result is a straightforward way to keep access, aggregation, and inter-switch links online with the optics profile these systems were designed to use. Use it where short-reach fiber is already in place and link consistency matters more than chasing unnecessary bandwidth. With a lifetime limited warranty and compatibility aligned to IBM Blade Network Technologies and Blade RackSwitch platforms, it fits the kind of deployment where uptime, sourcing discipline, and predictable optics matter.