GR-1089-CORE, Electromagnetic Compatibility (EMC) and Electrical Safety, is composed of requirements and test criteria for electronic equipment to operate reliably in telecommunication environments, such as Central Offices (COs) and Outside Plants (OSPs). This relates both to immunity from electrical and electromagnetic interference and from creating disruptive electromagnetic emissions. As with GR-63-CORE, testing criteria help ensure a safe environment for installation and maintenance technicians.
Originally, the EMC and Electrical Safety criteria were a part of GR-63-CORE. However, in the early 1990s, the decision was made to separate the physical and electrical criteria into two separate documents. GR-63-CORE kept the physical whereas electrical branched off into the document that eventually became GR-1089-CORE. Read more now.