He was in his private office, on the scrambled videophone.
"Syndrome"
Thomas Hoover
When Van de Vliet was at his office at the institute, they communicated by encrypted videophone.
"Syndrome"
Thomas Hoover
On the videophone Mrs. Kalmar was dismayed for a moment, until Dr. Lowell told her to put through an emergency order to Central Commissary and he'd verify it.
"No Charge for Alterations"
Horace Leonard Gold