User Manual Parvus DuraNET 3300 User Manual Download Resource Login to download this resource Username Enter your Curtiss-Wright Defense Solutions username. Password Enter the password that accompanies your username. Forgot password? Don’t have an account? Register here. The Parvus DuraNET 3300 is a MIL-rugged 26-port Cisco IOS-managed L2/L3 switch integrating the Cisco Systems ESS-3300 Embedded Services Switch in a robust design optimized for the harshest deployed military, aerospace, and industrial applications.