GR-63-CORE
The GR-63 (Network Equipment-Building System [NEBS] Requirements: Physical Protection) document identifies the minimum spatial and environmental criteria used for new telecommunications equipment to be used in an RBOC's (Regional Bell Operating Company's) Central Office (CO).
The spatial criteria covers:
- Cable distribution systems
- Distributing and interconnecting frames
- Power equipment
- Operations support systems
- Cable entrance facilities
The environmental criteria covers:
- Temperature & humidity
- Fire resistance
- Equipment handling
- Earthquake
- Office vibration & transportation vibration
- Airborne contaminants
- Acoustic noise
- Illumination
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Fire Resistance![]() | Transportation Vibration![]() |
Earthquake![]() | Temperature Humidity![]() |




