CHAPTER IV, SECTION 7 Acdirect: line telephone system was in ex: tence at Eauinwtok Atoll with exchanges located atostes Eimer and Fred) To meet the needs of OPERATION CASPLE it was necessary to in- “tall an exchange at Ursula and connect this to the existing svstenmt At other sites. meld phones connected: through the nearest exchange were prosided as required. At Biking Atoll an entirely Dow network Was dard wath oexshamies located at camp sites Phin -v<stemo was dist used ini No vember 2955. There was no conneetings tine beTeen the two atetl stems Rimer - one ehiet operator and eight Visula -- twe operators: rehef operator provided trom: klmer Operators Vare --oone chict operator and two Charke -- thrive operators Nan - Fax Ope racers -— Thee operators thiee operators Wath the exeeption of the exchanse at Poruea. the svstems as aiystalled were adequate Daring busy hours at site Edmer, -cated: opera. ter answered calls and men standimg behind Dorin construction and post-test periods, thom drsconneeted completed calls. The trathie nedoonty daring the nine hours of the scheduled work day. Daring operational phases the services were generals extended so as to provide 24-hour the exchange approached Loo usage ot the creuits avathible, “This extreme usage indicates an cnlirged exchange ais required to handle peak poniod trathe for a tuture operation of the =1Ze theexchanges. for reasons of econo, were min: continuous service. The telephone exchanges Were statted during the peak of operations as tollows Figure 4-36. Heures durmge the peak periods indicates that ot CASTLE. Fisure 4-56 shows the exchangeat Elmer. Teley none Exchange - Site Elmer Page 4-51