ABSTRACT: Automatic Callback (AC) is an outgoing CLASS feature that allows a customer to automatically recall the last outgoing call. The customer can request AC activation at any time after placing an outgoing call. The busy/idle status of the calling and called lines is monitored, and call setup is attempted when both calling and called lines are detected to be idle.

This Generic Requirements document (GR) defines the Telcordia view of generic requirements for applications of AC for residential and small business (non-Centrex) customers. The document provides the switching and signaling system procedures to support this feature. Applications of this feature to intra-Centrex calls are not addressed.

Issue 2 of this document incorporates changes to the feature interactions between AC and Calling Name Delivery. The updated requirements were specified in Bulletin 1, April 1995, and have also been incorporated into GR-1188, Calling Name Delivery Generic Requirements.

GR-215 replaces TR-NWT-000215.

When using GR-215, you may need to refer to GR-505, GR-506, GR-569, GR-606, and GR-1100, GR-30, GR-317, GR-394, GR-478, SR-504, GR-520, GR-524, GR-563, GR-568, and/or GR-1188. You may also want to refer to GR-227, GR-246, GR-391, and/or GR-1251.