transmission fault
Technical term used in computing and telecommunications for a failure or error in data transmission.
Because a transmission fault occurred, the data was not sent correctly.
通信障害 is a broader term for communication failure or outage, while 伝送故障 specifically refers to a fault in the transmission process itself, often at the hardware or protocol level.
Compound of 伝送 (transmission) and 故障 (fault, breakdown). The exact historical derivation is uncertain; the spelling is conventionally associated with computing and telecommunications.