The Westermo range of fibre optic modems ensures reliable communications over multimode and single mode fibre optic cables. With transparent operation, Westermo fibre optic modems act as converters for serial RS-232, RS-422, RS-485 and PROFIBUS protocols. Whether you wish to create a point to point link, a multidrop network or even a redundant ring, Westermo fibre optic converters provide rugged, reliable communications in the harshest environments.