| Catalyst 3550 Series |
| WS-C3550-12G | 10 GBIC ports and 2-10/100/1000BaseT ports |  |
| WS-C3550-12T | 10-10/100/1000BaseT ports and 2 GBIC ports | |
| WS-C3550-24-SMI | 24-10/100 and 2 GBIC ports:Std Multilayer SW Image | |
| WS-C3550-24-DC-SMI | 24-10/100+2GBIC ports(DC-Pwrd):Standard Multilayer SW Image | |
| WS-C3550-24-FX-SMI | 24-100FX MMF+2GBIC ports:Standard Multilayer SW Image | |
| WS-C3550-24-EMI | 24-10/100 and 2 GBIC ports:Enhanced Multilayer SW Image | |
| WS-C3550-48-SMI | 48-10/100 and 2 GBIC ports:Std Multilayer SW Image | |
| WS-C3550-48-EMI | 48-10/100 and 2 GBIC ports:Enhanced Multilayer SW Image | |
