Assertion: carrier's system | /r/CapableOf | carry hundreds of calls
Facets:
value: by the 1930s
type: TEMPORAL
value: at a time on coaxial cables
type: TEMPORAL
Source sentences:
text: In the 1920s, frequency-division multiplexing could carry several circuits on the same balanced wires, and by the 1930s L-carrier and similar systems carried hundreds of calls at a time on coaxial cables.