A router is configured via its configuration port. The SpaceWire standard does not specify how a router should be configured, but it is common practice for this to be done using the SpaceWire remote memory access protocol (RMAP). This provides a standard means of reading and writing to registers in the configuration port, but it does not specify the arrangement and function of registers in the configuration port. Work is currently being done on a SpaceWire plug and play standard, which aims to standardise SpaceWire network configuration. In the meantime each router configuration space has a proprietary arrangement of registers.