When using a fusion splicer, the typical splice loss is usually between 0. 05 dB for single-mode fibre and slightly higher for multimode fibre. 1 dB is generally considered acceptable in most fibre optic networks. 75 max per EIA/TIA 568) When testing cable plants per OFSTP-14 (double ended). Static electricity is an enemy of fiber optics and splicer electronics, especially in dry environments and/or air conditioning. 3 dB for mechanical splices; however, this can vary depending on the application, fiber type, and overall network performance requirements. 1 dB/splice (worst case) then we arrive at the following.