User guide

24 CATx KVM Extender Local Hubs
The PC won’t boot into the correct graphics mode
The extender includes DDC emulation for all standard resolutions and
there should not normally be any issues. However, you must be using
DDC capable CPU cables on each hub port.
For non-standard resolutions, you will need to explicitly set the
resolution in your operating system configuration ignoring the DDC
data read from the Local Unit.
Contact Technical Support if you have problems selecting your required
graphics mode.
The image is not stable and is blanking regularly.
Re-power the Remote Unit.
Can the extender be used with RGB video?
Yes.
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 B: Audio/Serial Ports: Operation & Multi-Port
Configuration, page 32.
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.