IHSE USA R434-91 Series SDLink Rackmount Hubs - Manual (Page 43)

Troubleshooting 41
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: Operation & Multi-Port
Configuration, page 54.
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.