相互通信

そうごつうしん

noun

•

intercommunication (usu. in telecoms contexts)

相	inter-, mutual, together, each other, minister of state, councillor, aspect, phase, physiognomy
互	mutually, reciprocally, together
通	traffic, pass through, avenue, commute, counter for letters, notes, documents, etc.
信	faith, truth, fidelity, trust