The Cisco DE-30+ digital gateway provides a connection path between the Cisco AVVID (Architecture for Voice, Video and Integrated Data) packet telephony network and the Public Switched Telephone Network (PSTN) or a PBX using digital (PRI ISDN) trunks. The DE-30+ supports 30 voice channels on an E1 interface. Gateways are managed, controlled, and administered through the required Cisco CallManager. The DE-30+ gateway consists of a single PCI bus-based card and mounts in any PCI bus-PC (where it only draws power).