Abstract: An interface conversion device performs a conversion between input data streams and standard interfaces with the same information rate. The device may comprise a first line receiver (RX1) for a first input data stream that detects errors in the received stream and an interface converter (IC1) that suppresses the bits in it not carrying information and performs the interface conversion. It also comprises a second interface converter (IC2) and a line transmitter (TX1) for conversion in the opposite direction. It may also comprise or include a second line receiver (RK2) for a second input data stream that detects the errors in the received stream, a memory module (MM1) where various frames of the incoming interface are stored in the addresses indicated by a memory control module (MCM), such that reading this sequentially generates the equivalent standard type interfaces. There may also be another memory module (MM2) and another line transmitter (TX2) that perform the conversion in the opposite direction.