Black Box ACU2222A - Manual (Page 46)

TROUBLESHOOTING
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6.3 Audio
The audio is very quiet.
The audio I/O is line-level and requires amplified speakers and connection to
devices providing line-level I/O.
The audio is loud but distorted.
Check that the audio input is not greater than line level (4V peak-to-peak). The
KVM extender accepts line-level audio input only.
The microphone output is barely audible.
See Appendix E: Audio/Serial Ports, page 58.
6.4 Serial
My serial device does not function.
The extender supports serial devices at data rates not exceeding 19.2K Baud
(although 38.4K operation might be possible with certain equipment).
Check the type of flow control used by the device and CPU. The extender supports
RTS, CTS, DTR, and DSR. Some systems may require a wiring adapter to transfer
RI and DCD.
Attach the device directly to the serial port on the PC and test whether the problem
is a PC or extender problem.
Some serial devices cannot be hot-plugged. Try connecting the device to a powered
Remote unit prior to booting the system.