Comrex BRIC-Link

Comrex BRIC-Link
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The Comrex BRIC-Link is a high-performance, low-cost Audio Over IP solution for full duplex audio transmission over IP links. Simple to configure via a standard web browser, BRIC-Link can be used on a wide variety of data networks including T1/E1, WANs, LANs, ISM band IP radios and satellite.

BRIC-Link offers superb audio quality with mono and stereo linear modes on circuits with substantial bandwidth. For reduced bandwidth applications, BRIC-Link offers AAC and HE-AAC modes as well as FLAC lossless compression. Based on BRIC Technology, BRIC-Link's advanced stability and reliability features are similar to those found in the ACCESS line of remote audio codecs yet enhanced to provide solid performance for mission critical applications.

BRIC-Link is a true codec, offering a full-duplex stereo encoder and decoder in each box. Where two-way transmission is not required, the reverse channel may be disabled. The BRIC technology incorporated includes a jitter buffer manager that automatically balances delay and stability, dynamically increasing delay based on network performance. For networks where the QoS is known these parameters may be set so that a consistent level of jitter buffer is maintained.

End-to-end coding delay in linear modes is less than 25ms and FLAC modes are less than 30ms. AAC modes incorporate around 100ms total end-to-end delay and HE-AAC modes deliver around 220ms. In addition to coding delay, network propagation and jitter buffers will add delay to any IP link and are network dependent.

BRIC-Link offers balanced, professional level analog I/O on 1/4" TRS connectors, and a full set of 1/4" to XLR adapters are included. Alternately, the Left I/O connectors may be switched to AES3 digital audio format. Consumer level, 3.5mm unbalanced I/O is also available on the front panel. Network connection is via 10/100 BaseT Ethernet jack. Contact Closure and Ancillary data are delivered on Mini-DIN style jacks. Audio level is displayed on the front panel via L/R tri-color LEDs. These LEDs may be configured to display send or receive level. A status LED on the front panel displays connection status as well as Ethernet status.

BRIC-Link acts as a web server, delivering an intuitive user interface web page. The page displays connection status, and allows the user to configure profiles for various connections, as well as point-and-click connection commands. Extensive network diagnostics are available via the statistics section, and audio level meters are available for remote monitoring of levels in and out.

Initial IP configuration is managed via a Windows-based setup utility to be run on a computer located on the same LAN. The utility also functions as an upgrade utility, allowing flash upgrades from the Comrex website to be applied to the hardware.

BRIC-Link can function as a streaming server, delivering multiple streams to computer based media players that support HE-AAC (also known as aacPlus). HE-AAC has the advantage of delivering good quality at very low network bandwidth. As an example, BRIC-Link can deliver more than 40 stereo streams over a T1 Internet connection when using the HE-AACv2 24Kb/s encoder. Tested players include WinAmp, VLC and Windows Media Player with Orban/Coding Technologies aacPlus Plugin.

BRIC-Link also offers the ability to act as a source feed for both SHOUTcast and Icecast servers. With a single BRIC-Link, you can expand your radio presence to the Internet without the need for a dedicated PC.

BRIC-Link provides for four end-to-end contact closures to be delivered along with the audio stream in each direction. Alternately, the contact closure inputs may be configured to initiate connections. An ancillary data stream is available via RS232 along with the audio stream.

In AAC modes, the system is capable of sending multiple one-way encode streams to separate BRIC-Links or Comrex ACCESS codecs (requiring additional bandwidth). In addition, BRIC-Link supports IP Multicast on capable networks.

Sold per unit; requires two or more for complete system.

Comrex BRIC-Link Specifications:
• Balanced stereo 1/4" TRS line-level audio input - 0dBu
• Balanced stereo 1/4" TRS line-level audio output - 0dBu
• AES3 1/4" TRS Digital audio input (through left TRS input when switched)
• AES3 1/4" TRS Digital audio output (through left TRS output when switched)
• Unbalanced stereo 1/8" line-level audio input
• Unbalanced stereo 1/8" line-level audio output
• Ethernet Port: 10/100 BaseT
• Contact Closures: 9-pin mini DIN
• Serial Port: 8-pin mini DIN
• Power: 4 pin connector for external 24VDC supply
• Balanced audio input level: 0 dBu
• Balanced audio output level: 0 dBu
• Unbalanced audio input level: -10 dBv
• Unbalanced audio output level: -10 dBv
• Full scale is 20dB above nominal
• External Supply: 24VDC 20 Watts
• Size: 6.5" W x 6.5" D x 1.375" H (16.51 cm x 16.51 cm x 3.5 cm)
• Weight: 1.5 lbs (0.68 kg)