Symbol 1396A from ISO 7000 - Title/Meaning: Transmission failure/malfunction 
Function/description: To indicate that the transmission has failed or is malfunctioning.
Own work using: iso.org/obp/graphics/grs/fd83cf12-67b6-419f-b58d-1be1f9ace8d6 200.png
Vectorization:  Mrmw