ABSTRACT: Integrated Services Digital Network (ISDN) Selective Call Acceptance (I-SCA), is a terminating call management feature. It enables I-SCA users to instruct a Stored Program Control switching System (SPCS) to attempt terminating call completion to the I-SCA user only from a limited number of calling Directory Numbers (DNs).

This document contains the Telcordia view of generic requirements for a Selective Call Acceptance feature operating through an Integrated Services Digital Network (ISDN) Basic Access Interface. The document presents requirements for the following:

• Feature Operations
,
• Internal Call Processing Controls
,
• Signaling/Message Structure
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• Administration/Operations
,
• Interactions
,
• Limitations and Restrictions, and
• Timing and Tolerances.