Symbol 5508 from IEC 60417 - Title/Meaning: Call pick-up Function/description: To identify the control by which calls made to another telephone in the same ""group"" may be answered by this telephone.
Additional information: 
See ITU-T Recommendation E.121
Published in: Supplement J, 1990
Own work using: iso.org/obp/graphics/grs/7118f011-5bf8-41e2-a6a7-1068a0028b67 200.png
Vectorization:  Mrmw