Evolution of integrated digital loop carrier

Integration of the remote digital loop carrier (DLC) terminal with the local digital switch (LDS) represents a major step in the evolution of public telecommunications networks. The introduction of the TR-08 interface has allowed wide-scale deployment of the integrated DLC (IDLC) in a multivendor environment. However, the limitations and inflexibility of the interface have long since become apparent. In addition, TR-08 systems cannot be easily upgraded to provide advanced services or features. The shortcomings associated with TR-08 systems led equipment manufacturers to develop larger and more efficient IDLC products based on a more modern interface design. Due to an operations, administration, maintenance, and provisioning environment that cannot be changed quickly or easily, IDLC deployment has been slowed in some Bell Operating Company access networks. Next-generation systems have been specifically designed to facilitate the positioning of optical fiber-and thus broadband capacity-closer to the customer, ultimately to the curb or home. This is a major strategic goal shared by nearly all service providers today