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IP Audio Module 102

full I/O and codec/DSP capabilities, two serial ports, versatile digital I/O, Encoding/Decoding, 5V supply

The IPAM 102 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), an I2S output is also available. 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 (two serial ports, digital inputs and outputs) allow the use with UI and control interfaces. Most of the Barix Annuncicom products are based on this module.

Main Features

  • G.711, G.722, PCM Encoding
  • MP3 Encoding
  • AACplus, MP3, Ogg Vorbis, G.711, G.722, PCM linear Decoding
  • Shoutcast/Icecast Source capability
  • Audio Level Supervision with SNMP Trap generation
  • IP Streaming via TCP, UDP, RTP, Multicast
  • Microphone Input
  • Line Level Input (Stereo)
  • Line Level Output (Stereo)
  • General Purpose I/O (8)
  • RS-232 Serial Port (TTL Level)
  • RS-485 Serial Port (TTL Level)
  • Supply Voltage (5V)
  • USB Flash Memory Interface

Designed in Switzerland and embedded in countless OEM products, from certified audio evacuation systems to Broadcast Studio Mixers, the Barix IPAM is the solution of choice for OEMs and product designers who want to add IP Audio capabilities to there devices easily and with simplicity.

Technical Specifications


5 VDC (-20% / +10%), 1.6 Watt max.

3 x 40 pin, high density, 0.8 mm spacing, SMT connectors



Two 10/100 Mbps (auto) Ethernet: primary with built-in PHY, secondary intended for redundancy use (MII only, requiring external PHY), outputs for dual color Link/Activity LEDs


Audio Interfaces

Mic input 111 mVPP max (with Bias power)

Stereo input 2.2 VPP max, both adjustable in sensitivity

Frequency response 20 Hz ..20 kHz (-3 dB)*

Dynamic range 87 dB, SNR -87 dB, THD <0.01% (-3dBFS)*

Stereo output 3 VPP max, volume, bass and treble adjustable

Frequency response 20 Hz ..20 kHz (-3dB)*

Dynamic range 94 dB, SNR -94 dB, THD <0.03% (-3 dBFS)*

I²S output (Inter-IC Sound)


Audio formats

PCM, G.711, IPAM 101 encode, decode, IPAM 102 encode, decode

G.722, IPAM 102 encode, decode

Ogg Vorbis, MP3, IPAM 101 decode, IPAM 102 encode, decode

MP3, IPAM 101 decode, IPAM 102 decode

AAC+ requires separate licensing by OEM

MP3, encoding/decoding up to 192/320 kbps

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

Misc. Interfaces

Dual TTL Level UART 300..230'400 Baud asynchronous Outputs for 2 dual color Ethernet status LEDs, 8 General Purpose I/Os, 1 input for reset button, 1-wire bus,

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 for configuration, 2 MB Flash memory

for system, application, data and web server content


Operating System

Embedded, robust OS, IP stack with support for TCP/IP, UDP, RTP, SIP, DHCP, Multicast/IGMP


User / Application Interfaces

Integrated web server (control/configuration),

browser based, serial or Ethernet control interface,

programmable software environment



Weight 14g, 2 mounting holes 2.7mm (for 2.5mm screws)


Dimensions (W x D x H)

53 x 39 x 8 mm (2.1 x 1.5 x 0.31 inch)



(Calculation acc. MIL217F at 40°C)

IPAM 101 min. 1 200 000h

IPAM 102 min. 1 100 000h


* depends on used codec, best results @ 48 kHz PCM

** 0 - 70% relative humidity, non-condensing


IPAM 102 Evaluation Kit



Order number: 2011.9114

Use Cases

Commercial Audio Streaming Applications

Digital Annunciator, Message Player, Message Repeater

Generic, bidirectional full-duplex VoIP module for Paging and Intercom Applications

Source Encoder for IP Audio Distribution Applications

Background Music and Music-on-Hold encoder for VoIP Applications

Low latency IP Audio Encoder for multichannel applications

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Ordering Numbers

  • 2011.0078

    IPAM 102


    Sold in quantities of 10, 200 and 1000.

  • 2011.9114

    IPAM 102 Evaluation Kit


    IPAM 102 based Barix products Exstreamer 500, Annuncicom 100, 200, 1000