ABSTRACT: GR-568 replaces TR-TSY-000568, Issue 1, but contains NO TECHNICAL CHANGES from that original document. It has been issued strictly to conform with the new Telcordia Technologies document format and GR process, and carries a new issue number and date.

A subscriber may want to have calls answered at another line when the called station is busy. The result is a reduction of uncompleted calls due to busy treatment being given when the terminating line is busy. Series Completion is a feature that allows calls to a busy Directory Number (DN) to be routed to another specified DN in the same switching office. It is a type of hunting feature in which DNs are grouped into rearranged ordered lists. This Generic Requirements document (GR) describes the view of Telcordia on generic requirements for the Series Completion feature.

GR-560, GR-561, GR-562, GR-563, GR-564, GR-565, GR-568, GR-569 replaced TR-TSY-000521 and TA-TSY-000229.