Nokia 3HE08021AA SFM-B Switch Fabric Module | 7950 XRS-20

Nokia (Alcatel-Lucent) 3HE08021AA SFM-B Switch Fabric Module for 7950 XRS-20 3HE08021AA is the SFM‑B (Switch Fabric Module X20 B) for the Nokia 7950 XRS‑20 core router chassis. It provides high-speed non-blocking switching fabric to interconnect all XCM carrier boards and XMA/C-XMA daughter cards inside the chassis, delivering full cross-band forwarding capacity for high-density core routing deployments. Key Features Part Number: 3HE08021AA (SFM‑B / SFM X20 B) High-speed non-blocking switching fabric for 7950 XRS‑20 router chassis Interconnects all XCM carriers and XMA / C-XMA interface modules Hot-swappable for in-service replacement and fabric redundancy Supports high-density interface configurations (required for 40-port 10GE XMA cards) Deployable in redundant fabric groups to maximize system uptime Platform Compatibility Exclusively designed for Nokia 7950 XRS‑20 core router chassis. This SFM X20 B variant is required to operate high-density 40-port 10GE SFP+ XMA daughter cards; older standard SFM X20 modules do not support these high-density line cards. Our Stock Advantage Original tested Nokia 3HE08021AA SFM‑B fabric modules in stock. Full functional testing before shipment, ideal for chassis upgrade, spare replacement and network expansion projects worldwide. Need quotation or technical verification? Send us your BOM list, we offer fast pricing, part verification and global shipping. Platform Card ID / Type Part Number 7950 XRS XCM-X 3HE07147AA 7950 XRS CPM-X20 3HE07116AA 7950 XRS XMA-20 3HE04836AA 7950 XRS XMA-40 3HE05504AA 7950 XRS XMA-100 3HE06796AA 7950 XRS XSA 3HE04835AA 7950 XRS XSA-X 3HE07148AA 7950 XRS XFA-12 3HE06151AA 7950 XRS XFA-48 3HE06152AA 7950 XRS XFA-10G-SFP+ 3HE06153AA 7950 XRS XPA 3HE04837AA 7950 XRS XRS Chassis 3HE04833AA 7950 XRS XRS-FAB 3HE04839AA 7950 XRS XFM-FAN 3HE04838AA 7950 XRS XFM-FAN2 3HE07149AA 7950 XRS XPS-3000 3HE07411AA 7950 XRS 100GBASE-LR4 CFP 3HE05935AA 7950 XRS 40G QSFP+ SR4 3HE05881AA 7950 XRS 40G QSFP+ LR4 3HE05882AA 7950 XRS 10G SFP+ LR 3HE00028AA 7950 XRS SFP 1G LX 3HE00017AA