scope:

This Technical Requirement document (TRQ) defines a minimal set of electrical requirements for a network equipment facility line-sharing filter, often referred to as a central office (CO) Line Sharing Splitter (LSS). The parameters defined include terminations, frequencies, testing, test signatures, dc characteristics, voice-band characteristics, attenuation, envelope delay distortion, impedance, longitudinal balance, and metallic balance. Additional features and performance characteristics may be included in a network equipment facility LSS; however, such features and performance characteristics are beyond the scope of this document.

Purpose

This TRQ is intended to facilitate the provisioning of various digital subscriber line (DSL) technologies and voice-band services over the same loop. The document is written broadly to permit the LSS to be used for current DSL technologies and potential new DSL technologies that use the same frequency spectra.