Are there other documents that relate to NEBS?
Yes. There are other documents that relate to NEBS. A very important sister document is GR-1089-CORE, Electromagnetic Compatibility and Electrical Safety - Generic Criteria for Network Telecommunications Equipment. Together with GR-63-CORE, these 2 documents make up what's known as the "NEBS Criteria".
GR-1089-CORE details Electromagnetic Compatibility (EMC) and Safety requirements, including:
Another important document is GR-78-CORE.
This document consists of manufacturing and product design guidelines.
To get a full appreciation of all the documents related to NEBS, check out Telcordia's "Family of Requirements" FR-2063.
Go to the following link and type "GR-1089", "GR-78" or "FR-2063" in the "Product Search" window to obtain ordering information: Telcordia Store Link