This document provides an overview of Avaya's contact center portfolio and call routing capabilities. It describes key components like Vector Directory Numbers (VDNs), call vectors, agent selection methods, and multi-site call routing. VDNs act as "soft" phone numbers to route calls based on dialed digits. Vectors provide scripted call treatment logic. Agent selection considers skills, levels, and metrics like idle time and occupancy. Advanced routing optimizes call distribution across multiple contact center locations.