Cisco MEM-3900-1GB= enterprise networking (router/Catalyst switch/UCS families) Telecom System Card / Module

The Cisco MEM-3900-1GB= is a 1GB DRAM module, supplied as a single DIMM, built for the Cisco 3925 and 3945 Integrated Services Routers (ISR G2), the larger models in the 3900 Series. It adds to the router’s main system memory, which Cisco IOS uses for routing tables, packet buffering and the growing feature-set images the ISR G2 platform supports, including security, voice and unified communications bundles that need more memory headroom than the router’s base configuration ships with. It is specific to the 3900 Series memory architecture and DIMM slot layout, and is not interchangeable with the memory used on the smaller 2900 Series in the same ISR G2 generation. The 3925 and 3945 remain in service as larger branch or regional-office routers, and a memory upgrade like this is a straightforward way to keep an existing router running a current IOS feature set rather than replacing the hardware. Tech-Star (UK-based, shipped worldwide) stocks Cisco components to support ongoing network maintenance.