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Audiolink 2

Audiolink 2 card

The AL020 interface card.
From left to right are: power supply, ATM 155 port, two Ethernet ports, MADI in, MADI out, RS232.
Click on the pic for an enlarged view


Audiolink units connect professional audio equipment to an Asynchronous Transfer Mode (ATM) network.

The encoding of the audio on the network conforms to AES47-2002, the new standard for transmission of digital audio over ATM networks.

Audiolink 1 interfaces connect to ATM networks at 25 Mbit/s over Cat3 UTP.

AL020 specification

Internal interfaces

External interfaces

From left to right along the front edge:

Power supply

Any of the following options can be used:


The AL020 has VCXOs to generate an audio clock for 32, 44.1, or 48 kHz sampling frequencies. This clock can be locked to any of:

On the I2S interfaces, word clock and bit clock may be sourced by the AL020 or by the "host" equipment; the AL020 also sources a reference clock from which the "host" equipment can derive its bit clock.

Internal routing

Audio can be routed, as single channels or as multi-channel bundles, between any of:

Data messages can be routed between any of:

ATM cells can be routed between any of:

This allows the Ethernet interfaces to be used to "daisy-chain" units together to share a single port on an ATM network. Because the Ethernet ports use auto-MDIX, no cross-over cables are required.


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