ABSTRACT:
Telecommunications service providers use GR-1089 to ensure that their telecommunications equipment meets the Electromagnetic Compatibility (EMC) and electrical safety criteria necessary to perform safely and reliably. The NEBS criteria in this document covers equipment in Central Offices (COs); equipment in the Outside Plant (OSP) at locations such as Controlled Environmental Vaults (CEVs), Electronic Equipment Enclosures (EEEs), wireless applications and huts; equipment in uncontrolled structures such as cabinets; and network equipment at the customer premises.

Telecommunications equipment, by nature of its application in the telecommunications network, may be exposed to one or more sources of electromagnetic energy. The system-level generic criteria for EMC presented in this NEBS document are intended to help avoid equipment damage and malfunction because of lightning, 60-Hz commercial power fault conditions, Electrostatic Discharge (ESD), Electrical Fast Transient (EFT), Electromagnetic Interference (EMI), operation in the presence of a DC potential difference, and operation in a steady-state induced voltage environment. Safe voltage levels for intentionally applied sources, electrochemical corrosion effects, grounding, and DC powering are considered as well.

GR-1089 applies to wireless systems providing fixed services that are installed in locations with telecommunications network equipment or information technology networking equipment. It also applies to equipment that is mounted outside the facility and whose antennas are integrally mounted or mounted on the roof or on an antenna mast.

GR-1089 issue 8 has been revised since Issue 7 was published in December 2017. The most extensive technical changes are listed below:

• Comments in GR-1089-ILR Issue 7B, September 2020, are the basis for this update. This Issues List Report was reviewed with previous technical forum members.
• Updates were made to Section 9.8.3 "Bonding of Battery Return (BR) Input Terminals", testing procedures and criteria. Specific attention was made to update R9-16 [255] that provides requirements and test methods to evaluate equipment in a DC-I configuration.
• A new port Type 9 was added for other metallic ports, and the conducted emissions and conducted immunity tests were updated to include this port type.
• New requirements were added to address Fault Managed Power Systems (FMPS).
• A new Appendix F "DC-I/DC-C and IBN/CBN Discussion" was added to provide tutorial information on DC-C and DC-I equipment, and CBN and IBN topologies.
• New requirements added to Issue 8 begin at absolute number [256].