This part of GB/Work 39564 specifies the composition, classification and naming requirements, test methods, inspection rules, marking, packaging, transportation and storage of optical fiber distribution box products in the distribution facilities shared by multiple telecom service operators for fiber-to-the-home use . This part is applicable to the optical fiber distribution box for multiple telecommunication service operators in FTTH. The optical fiber distribution box for multiple telecommunication service operators in other scenarios can also be used as a reference. Note: Refer to Appendix A of GB/T39564.1-2020 for the selection guide of distribution facilities in FTTH.