ABSTRACT: To maintain the quality and reliability of the telecommunications network, testing is an ongoing necessity. This document presents the view of Telcordia on generic Test System Controller/Remote Test Unit (TSC/RTU) functional requirements to support metallic loop testing. The document serves as a companion document to GR-202, Loop Testing Messages at the OS/TSC Interface, which specifies messages to accomplish the testing of subscriber loops over the Operations System (OS)/TSC-RTU interface.

GR-844 replaced TA-TSY-000844.

When using GR-844, you may need to refer to GR-202, GR-324, and/or IEEE 743. You may also want to refer to TR-TSY-000465, GR-818, GR-819, and/or GR-834.