ABSTRACT: GR-588 replaces TR-TSY-000588, 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.

Message registers allow the customer to receive a running account of the accumulated message units on lines with this feature. This is done by providing charging information, in terms of message units, based on the duration of each call, the location of the called party, and the type of calling party. This type of service is used primarily by Private Branch Exchange (PBX) customers such as hotels, motels, hospitals, and other business customers; however, the feature may be applied to any line that does not have four- or eight-party service.

This Generic Requirements document (GR) provides the view of Telcordia on generic requirements for the Customer Premises Message Registers feature.