NMX-ATC-N4321 Audio Transceiver

Audio over IP Transceiver

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The NMX-ATC-N4321 Audio Transceiver is an audio-over-IP solution that both sends and receives two-channel balanced or unbalanced audio over IP. Simply connect a balanced audio input into the IN port and it's converted to IP packets that are switchable and routable just like data or voice. The balanced audio output receives an audio-over-IP stream and decodes to analog while preserving audio fidelity. Perfect for point-to-point or point-to-multi-point audio delivery, the NMX-ATC-N4321 provides audio matrix switching and distribution using the same control options as SVSI's Networked AV video switching and distribution solution.

With two auto-sensing gigabit Ethernet ports, units can be stacked to deliver low-latency multi-channel audio over a house network or a physically separate network. One Ethernet port is POE for use with a POE switch, eliminating the need for an external power supply. An audio matrix with any number of inputs and outputs can be constructed with the NMX-ATC-N4321. Since control is the same as for SVSI's video over IP matrix, video and audio matrices can be combined and routed using the same controller for the ultimate in digital media distribution.


  Version Language Size Uploaded
file type icon Data Sheet
updated: Jan 11, 2023
    489 KB Jan 11, 2023
file type icon Direct Control API - NMX-ATC-N4321 Audio over IP Transceiver
updated: Oct 22, 2020
    250 KB Oct 22, 2020
file type icon NetLinx Control for N-Series Products Documentation Addendum
updated: Oct 22, 2020
    1.05 MB Oct 22, 2020
Bim Objects
file type icon NMX-ATC-N4321 - BIM Object
updated: Aug 12, 2019
    Aug 12, 2019
platform icon SVSI N-Able Mac
version 2021-12-13, updated: Jan 07, 2022
2021-12-13     90.5 MB Jan 07, 2022
platform icon SVSI N-Able PC
version 2022-12-29, updated: Jan 09, 2023
2022-12-29     Jan 09, 2023
platform icon SVSI N4000 Audio over IP Transceiver Firmware Updater
version 1.0.4, updated: Nov 11, 2021
1.0.4     61.4 MB Nov 11, 2021
Quick Start Guides
file type icon Quick Start Guide - NMX-ATC-N4321 Audio over IP Transceiver
updated: Oct 22, 2020
    638 KB Oct 22, 2020
Install Guides
file type icon SVSI Networked AV - Pre-Implementation Guide
updated: Mar 29, 2018
    607 KB Mar 29, 2018
Product Guides
file type icon Product Guide - N-Series Minimum Network Requirement
updated: Oct 23, 2020
    88.8 KB Oct 23, 2020
file type icon Product Guide - N-Series Stream Compatibility Guide
updated: Sep 14, 2022
    380 KB Sep 14, 2022
file type icon NET-SVSI-MIB.txt
updated: Aug 04, 2021
    94.5 KB Aug 04, 2021

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Dimensions (HWD) 1.05" x 7.888" x 5" (2.67 cm x 20.04 cm x 12.7 cm)
Audio Inputs 2-channel user selectable balanced or unbalanced audio
Audio Outputs 2-channel balanced audio (1x 5-pin phoenix connector), 2-channel unbalanced audio (headphone jack)
Communications Ethernet: Multi-cast, unicast, IGMP v3, IPv6, layer-2 and layer-3 switch compatible.
Front Panel Components Reset button, ID button, Power LED, Status LED. See Data Sheet for details.
Rear Panel Components 12 Volt DC power input; POE, 8-wire RJ45 female; 10/100/1000 Mbps 10/100/1000Base-T auto-sensing gigabit Ethernet switch port. See Data Sheet for details.
FG Numbers FGN4321-SA
  • NMX-ACC-N9312


    Power Supply 12V External
  • NMX-ACC-N9382


    1RU Power Supply 16-Channel 12V for up to 16 SVSI N-Series Encoders, Decoders and Audio Transceiver
  • NMX-ACC-N9101


    Mounting Wings for SVSI N-Series Encoders, Decoders and Audio Transceiver
  • NMX-ACC-N9102


    1RU Rack Shelf for Two Side-by-Side SVSI N-Series Encoders, Decoders and Audio Transceiver
  • NMX-ACC-N9206


    2RU Rack Mount Cage with Power for Six SVSI N-Series Card Units

HARMAN Professional Solutions:

NMX-ATC-N4321 Audio Transceiver

Audio over IP Transceiver