The Cisco VN 2900 Network Adaptation Interfaces are part of the Cisco VN 2900 Video Networking System-a high-density video encoder and decoder that receives audio and video streams, performs video processing, and adapts the streams to any standards-based digital broadband network.The Cisco PS2043 DS-3/E3 ATM Network Adaptation Interface provides ATM connections to DS-3/E3 ATM copper wire networks.