The CS 1000 UNIStim endpoints and Media Gateways connect to Avaya Device Adapter Snap-in over the IP network. The snap-in then presents these endpoints as Avaya SIP Telephony (AST) sets to Session Manager. The Personal Directory for UNIStim endpoints migrates to Avaya Device Adapter Snap-in. Corporate directory support for UNIStim and digital endpoints using Avaya Aura® Device Services (AADS) is optional.