Dome type fiber optical splice closures (FOSC) were developed to use on central loop and last mile cable routes during construction of fiber optical network. Other called bunchy FOSC useful to joint the fiber cores by fusion splicer and heatshrink steel tubes. Commonly apllied overhead, with and without termination of main cable. FOSC provides more reliable protection and long life period of usage compared to fiber optic termination boxes for the central loop feeding cable, to connect it with smaller capacity cables in FTTx technology of internet construction. This implemented by heat shring joints protechtion and air exhaust.