long-distance (adj.) Look up long-distance at Dictionary.com
1878, in reference to telephoning (1876 of railway fares and traffic), from long (adj.) + distance (n.).
Lieut. G.R.R. Savage, R.E., writing from Roorkee, North-West Provinces, India, sends us an account of some interesting experiments he has been making on long-distance telephones. He constructed telephones expressly for long-distance work, and succeeded in getting a bugle-call heard distinctly over 400 miles of Government telegraph line .... ["Nature," May 16, 1878]