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IP Audio Module 302

Audio encoding / decoding, one serial port, 4 digital I/O, 3.3V supply.

The IPAM 302 is a universal, standalone, IP Audio function block which can be easily embedded into OEM products. The module encodes and decodes IP Audio streams from/to analog sources (stereo). Supporting a large range of protocols and codecs the module can be used for both VoIP and IP paging as well as high quality music distribution and IP music streaming applications. Control I/O (one serial port, four digital inputs/outputs) allow the use with UI and control interfaces. Various software packages for standard applications are available for download from the Barix website, optimized for encoding, audio distribution, paging and intercom, including a full featured SIP client. Custom software can easily be written, based on existing packages from Barix written in the ABCL language. For hardware integration a development specification with schematic, pinout and suggestions for the layout of a custom carrier PCB is available. Barix Annuncicom60 and Instreamer are based on this module. The IPAM302 is pin compatible with the Barix IP AUDIO MODULE 300 (decoder only), adding the full duplex capability on the same form factor and power supply.

Audio Interfaces

Mic input 118 mVpp max. (with Bias power)Stereo input 2.2 Vpp max., both adjustable insensitivity

Frequency response 20Hz … 20kHz (-3 dB)

Dynamic range 90 dB, SNR -89 dB, THD <0.03% (-3 dBFS) Stereo Output 2.37 Vpp max. volume, bass and treble adjustable

Frequency response 20 Hz … 20 kHz (-3 dB)

Dynamic range 90 dB, SNR -90 dB, THD <0.05% (-3 dBFS) I2S bus (inter-IC Sound)

Audio Formats

I2S bus (Inter-IC Sound), Analog stereo out 1.5Vpp,

Volume, base and treble adjustable by application

G.711 and G.722

PCM 16 bit and 8 bit (uLaw, aLaw) @ 8..48Khz

MP3 encoding/decoding up to 192/320 kbps


AAC+(deconde only)

Note: AAC+ requires separate licensing by OEM

Network Interface

10/100 Mbit Ethernet (Auto), TCP/IP, UDP, RTP, HTTP, DHCP, SNMP, AutoIP, SonicIP, IPzator

Misc. Interfaces

TTL Level UART 300..230’400 Baud

Outputs for 2 dualcolor Ethernet status LEDs

4 General Purpose I/Os, 1 input for reset button,

2 status LED outputs, USB1.1 interface for memory


CPU / Memory

Integrated CPU / MAC / IO controller with on-chip 256 KB RAM, 2 KB EEprom (configuration), 2 MB Flash memory (application and web server content)

Operating System

Embedded, robust OS, IP stack with Multicast supportUser / Application Interfaces

Integrated web server (control/configuration),

browser based, serial or Ethernet control API,

programmable software environmentPower requirements

Single 3.3 VDC, 1.6 Watt max.


Weight, dimensions

14 g approx.

2.2“ x 1.3“ x 0.39“, 56 mm x 33 mm x 10 mm



Min. 1200 000h acc. to MIL217F at 40°C

2012.9129 IPAM 302

Sold in quantities of 10, 200 and 1000.

When you order IPAM modules, you agree to the Terms & Conditions.


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