IS420ESWBH3A Function Description GE Ethernet/IONet switch ESWB comes in five versions (H1A to H5A), the difference being the type of fiber ports they can include, such as none, multi-mode, or single-mode (longer distance) ports. Depending on the hardware form (ESWA or ESWB) and the selected DIN rail mounting direction, the ESWx switch can be DIN