WS-C2960+48TC-L is the replacement of WS-C2960-48TT-L , they use the same architecture, but to enable new software features and releases, the WS-C2960+48TC-L double the RAM (128 MB) and flash memory (64 MB) of WS-C2960-48TT-L.
www.router-switch.com/ws-c2960 48tc-l-p-5257.html www.router-switch.com/ws-c2960-48tt-l-p-430.html