Underwriters Laboratories Inc.

About UL | Careers | Contact Us

NEBS Testing Services

NEBS stands for "Network Equipment-Building System." It is a term commonly used to refer to a family of documents that apply to telecommunications equipment located in a Central Office. Two of the most common documents used for testing are GR-63-CORE, Network Equipment-Building System Requirements: Physical Protection, and GR-1089-CORE, Electromagnetic Compatibility and Electrical Safety -- Generic Criteria for Network Telecommunications Equipment.

Reliability of the telephone system is considered a national security issue, is demanded by consumers and makes good business sense. Therefore, NEBS testing is taken very seriously by both the Regional Bell Operating Companies (RBOCs) and other service providers as well as manufacturers developing equipment used for the telecommunications network.