ABSTRACT: This document provides the Telcordia view of generic requirements to monitor and control the volume of D-channel messages on individual interfaces and common resources to prevent the overloading of a Switching System. These requirements are expected to reduce the possibility of Switching System overload. The requirements provide for D-Channel messages to notify Customer Premises Equipment (CPE) of Switching System congestion.

It is expected that sophisticated CPE will react to these messages and be able to reduce their calling demands until notified that congestion no longer exists. If an overload does occur, the requirements are intended to provide a systematic approach to reduce the overload and help minimize the impact on customers.

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