The table below gives a partial list of the Telcordia GRs.

GR831 -   Operations Application Messages - Language for Operations Application Messages It  specifies implementation level requirements for TL1.This document mainly  focuses on the syntax and semantics of TL1 messages(input, output, acknowledgment and autonomous).

GR199 -This document specifies the messages and data dictionary information required for  the     memory administration functions for SONET and switching NEs. It also provides provisioning messages for common NE and message related to Gateway NE.

GR833 - NE and Transport Surveillance Messages.  This documents specifies message structures for  network maintenance and surveillance  functions.

GR 815 - This document specifies generic requirements for Network Elements (NEs) and Network Systems (NSs) security, i.e., the  generic security features required of a total NE/NS environment. These requirements are generic and are not specific to any particular  NE/NS. GR 815 defines the baseline security requirements ie. a minimum level of security. Additional security may be needed for specific  applications.

TR  835  - This document specifies message structures and data elements for Network Element and Network System  Security administration.

SR-NWT-002723  -This document specifies applicable TL1 Messages for SONET Network Elements.
 

Where to get GRs?.

Visit the following URL  to get more information about GRs.
http://telecom-info.telcordia.com/