NORTEL NTAY18AA PASSPORT DIGITAL VOICE EXPANSION MODULE

The Nortel Networks Passport 4400 series of multiservice access switches integrates voice, fax, modem, video, local area network (LAN), and legacy-data traffic over a singlewide area network (WAN) link, or over an existing routed network. Passport 4400 switches support both Voice over Frame Relay (VoFR) and Voice over IP (VoIP). The Passport 4400 series provides an efficient, reliable, and easily managed WAN access solution with sophisticated compression and bandwidth management, and superior Quality of Service (QoS) for networks ranging in size from small point-to-point to thousands of nodes. Powerful networking features and flexibility provide a superior branch WAN solution to support new business applications.