IHSE USA 234 Series VTO2/VRO2 KVM-Extender - Manual (Page 40)

VTO2/VRO2 V.6.00 –5 STRAND KVM-EXTENDER
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Appendix C: Audio/Serial Upgrade
The Audio/Serial Upgrade option consists of daughter boards that allow bi-directional stereo
audio and a full-duplex serial data link to be sent across the regular interconnection cable in
addition to keyboard, mouse and VGA/DVI video.
To set up the extender’s audio and serial link, please follow all of the instructions detailed in
this appendix. If you have any questions, contact Technical Support.
Serial Interface - Set Up and Operation
No setting up or user adjustments are required. Please note that on the Dual Access model,
the serial link is always active.
Please bear in mind that the Remote Unit’s serial port is wired as DTE (the same as that on a
PC). To connect a serial printer (or other DTE rather than DCE device) to the Remote Unit,
you will need a Null-Modem (crossover) cable between the Remote Unit and the printer.
A serial touch screen may be plugged directly into the Remote Unit.
Serial Interface - Handling Multiple Serial Devices
The extender’s serial interface transmits/receives six signals (3 signals in each direction).
Normally four of these signals are used for hardware handshaking (in addition to TX & RX).
However, because each handshaking line can support signals up to 19,200 Baud it is possible
to configure the serial interface to handle up to three simple 2-wire (Tx/Rx only) serial links.
Select Xon/Xoff software flow control on the remote device and PC.
To do this you will need to construct a custom breakout cable. Please contact technical
support for further information.