The RUGGEDCOM RS400 is an industrially hardened, serial device server with an integrated, fully managed, Ethernet switch, designed to operate reliably in electrically harsh and climatically demanding environments. 128-bit Encryption; 4 port serial server, 4 port managed Ethernet switch & an optional V.90 modem 87-264 VAC or 88-300 VDC XX = No power module 2 D = DIN rail mounting xx = none C01 = Manufacturing modification: Conformal Coating L2L2 = 100FX singlemode LC, Standard 20km 3D = 4x RS232/RS422/RS485 via DB9 XX = No modem