NX-100 Network Audio Overview
Introduction
The NX-100 Network Audio Adapter converts an analog audio signal to digital packets for transport over
IP-based networks to other network-connected NX-100’s for conversion back to analog. The NX-100
significantly reduces installation and operational costs when distributing audio signals to multiple remote
locations by allowing the use of existing data networks (LAN, WAN and the Internet). Applications include
paging, messaging and background music distribution in airports, corporate campuses, transit systems
and many others.
The NX-100 can simultaneously send and receive audio to/from single or multiple NX-100’s at remote
locations. In addition to the audio stream, the NX-100 can simultaneously transport RS-232 serial data
and contact closures for remote control of peripheral equipment.
Transmission Method
Each NX-100 has a fixed MAC address and requires a static IP address. Each NX-100 communicates
with single or multiple NX-100’s in Unicast or Multicast modes. In Unicast mode, the NX-100 can send up
to four identical streams to up to four NX-100’s over LAN, WAN or the Internet. In Multicast mode, the NX-
100 can send a single stream to up to sixty-four NX-100’s within a multicast-capable LAN or WAN.
Front and Rear Panel Features
The NX-100 front panel includes Link/Activity, Full-Duplex/Collision, Status, Error and Run LED indicators
plus a recessed hardware Reset button.
The NX-100 rear panel includes a balanced mic/line input with adjustable volume control and a balanced
line output. A standard Ethernet port (10/100BaseT) allows connection to Ethernet-based network hubs or
switches. An RS-232 serial port is configurable as a TCP client/server or for UDP data transport with
adjustable baud rate up to 115200 bps. Eight programmable contact inputs can be used to trigger
Broadcast Patterns (described below) as well as activate single or multiple contact outputs on remote NX-
100’s. The NX-100 is powered with the AD-246 AC adapter or external 24 VDC power supply. Alternative
versions of the AD-246 are available for worldwide use.
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