Symbol 5502 from IEC 60417 - Title/Meaning: Incoming calls barred Function/description: To identify the control by which all calls to this telephone are blocked.
Additional information: 
See ITU-T Recommendation E.121
Published in: Supplement J, 1990
Own work using: iso.org/obp/graphics/grs/ba648220-2ff8-440c-8575-0c94afc02a78 200.png
Vectorization:  Mrmw