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Expansion module - 4 ports - Token Ring - fiber optic, Token Ring - refurbished - plug-in module, English
The Cisco Systems Catalyst 3900 Series is a family of second-generation Token Ring switches that combines unsurpassed performance and functionality with a cost-effective price, ideally suited for desktop connectivity. The Catalyst 3900 comes with 20 fixed ports and a unique FlexSlot that can accommodate two expansion modules or, in the future, one double-wide module. Available expansion modules include a 1-port ATM OC-3c uplink, a 2-port fiber and copper Inter-Switch Link (ISL) uplink for Token Ring transport over Fast Ethernet, a 4-port fiber Token Ring module, and a 4-port copper Token Ring module. The Catalyst 3920 comes standard with 24 fixed ports and combines the unsurpassed performance and functionality of the Catalyst 3900, with an even more cost effective price, making switching to the desktop a technically superior option to legacy shared-media hub attachments.
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