This analog card contains four bidirectional analog channels, and is primarily used for high quality audio. Each of the four ports communicates with a corresponding port at the remote node, and each port is four-wire (separate transmit and receive pairs) with 600 ohms of source/load impedance. The analog bandwidth is from 140 Hz to 22 kHz, and has very low noise. Eight general purpose TTL level I/O lines are included on this card.
We're very happy with the multiplexers that you supplied. The nature of the customer’s installation means that we won’t hear general feedback unless things go wrong – we’ve not received any complaints so assume that there have not been any problems. We found the equipment straight forward to set up using the supplied documentation.