New Key West-Havana carrier telephone cable

A NEW SUBMARINE cable was laid recently between Key West and Havana to furnish increased telephone facilities between the United States and Cuba. This is the longest deep sea telephone cable in existence and also is unique in being the longest telephone cable circuit without intermediate repeaters and without inductive loading. The new cable operates at frequencies up to about 28,000 cycles per second; it has a single central conductor with concentric tape return, and employs the newly developed material paragutta for insulation. Due to the smaller dielectric constant and to the smaller leakance, the cable is much smaller in size than any of the three other cables between these countries.