4 Port Fiber Token Ring Feature Card (MMF ST)
In 1997, Cisco introduced the second-generation family of Token Ring switchesæthe Catalyst 3900 stackable Token Ring switch, followed a few months later by the Catalyst 3920 stackable Token Ring switch. These products quickly gained a high level of customer acceptance and have subsequently been installed in thousands of mission-critical Token Ring networks worldwide. However, since that time the number of customers continuing to use Token Ring has decreased dramatically, with most customers converting to networks based on Ethernet. The demand for Token Ring products is now at a very low level. Vendors that produce chips used for the production of these products are discontinuing those chips, making the continuing production impossible without expensive redesign. Considering the low level of demand, it is not practical for Cisco to undertake this redesign. Cisco is, therefore, announcing the End of Sale of the products listed in Table 1, effective February 12, 2003. There are no replacement products. Cisco is making this announcement a full year prior to actual End of Sale to give customers who have not yet completed migration to Ethernet an opportunity to adjust their plans as necessary.
Cisco Feature Card 4p TR MM ST f Cat 3900, Token Ring, Cisco 3900 upgrade slot
Cisco Feature Card 4p TR MM ST f Cat 3900. Data link protocols: Token Ring. Slot type: Cisco 3900 upgrade slot