ITU-T Recommendations

With the liberalization of telecommunications, many services are provided by several Operators on the same cable, and equipment owned by different Operators is installed in the same telecommunication facilities and in many cases these are interconnected with each other. Therefore, there is a possibility of trouble related to EMC, resistibility, and safety occurring. This Recommendation describes necessary steps to ensure safe and problem-free operation in multiple Operator environments. Co-location arising from telecommunication liberalization should be taken into account, and necessary subjects are described fromthe viewpoints of EMC, resistibility, and safety.