A data stream having a bit rate of R gigabits per second (R=1 or an integer power of 2) is transported over a synchronous network using virtual concatenation. A prescribed number of channels (e.g., 7 for SDH, 21 for SONET) are allocated for transmitting streams of containers over the network. A block of data from the data stream is distributed over a group of containers of several channels. Received containers are stored in a memory until bytes from all containers from one of the blocks have been received. Memory is addressed with an address having a first set of bits determined by a position of the container in the stream of containers and a second set of bits determined from an offset determined by a position of the information in the container added to a base address for a channel from which the container was received.