Engineering problems and performance record of the Hawaiian interisland radio network

INSTALLATION of the present interisland´ radio network1,2 of the Hawaiian Telephone Company required consideration of many equipment and transmission engineering problems. Because of the unique geographical configuration of the area served, a great deal of preliminary investigation was needed to select operating frequencies which were both available and suitable for use from a transmission standpoint. Various types of radio equipment were then considered to determine which could best provide the needed facilities. Selection of sites and installation of radio equipment also posed a number of specific problems. With the exception of 900-megacycle (mc) links terminated at the exchange buildings in Honolulu and Wailuku, all of the radio terminals are remote from the connected exchanges; the multiplexed channels are extended over cable at Honolulu, Kauai, and Lanai, and over open-wire lines on the islands of Hawaii and Molokai.