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RACKMOUNT SERVSWITCH™ BRAND CAT5 KVM EXTENDER LOCAL HUBS
On KVM/Serial/Audio links, take these steps:
3. Check the data rate. Is the device operating at a rate not exceeding
19,200 bps? Is the CPU’s serial port set to the same data rate?
4. Check the data format and flow control. Are the device and your PC’s driver
or serial-communication program using the same format and flow-control
type?
5. Is your PC a UNIX
®
workstation? In order to operate correctly, some UNIX
workstations need to see the DCD signal from the serial device, but the
Extender doesn’t carry DCD. Call Black Box Technical Support if you’ve
ruled out the other possibilities and suspect that this might be your problem.
A CPU receives garbage from its serial device or vice versa.
You’ll approach this problem differently on KVM/Serial links and KVM/Serial/
Audio links. On KVM/Serial links, take these steps:
1. Check the data rate. Is the device operating at either 9600 or 19,200 bps? Is
the Extender set to the same data rate (see
Section 5.4
)?
2. Check the data format. Is the device using 8 data bits, no parity, and 1 stop
bit? (This is the only data format the Extender recognizes.)
On KVM/Serial/Audio links, take these steps:
1. Make sure that the data rates of the device and the CPU’s serial port both
match, and that the data rate doesn’t exceed 19,200 bps.
2. Make sure that the device and your PC’s driver or serial-communication
program are using the same data format.
The KVM/Serial Extender doesn’t seem to work with my graphics tablet.
At the time of this writing, certain serial graphics tablets don’t work with the
KVM/Serial Extender. This is because their drivers must detect the tablet at
9600 bps, but then dynamically change the data rate to 19,200 bps. The Extender’s
data rate is fixed at
either
9600
or
19,200 bps (see
Section 5.4
); it can’t adapt to on-
the-fly data-rate changes. Please call Black Box Technical Support; even if we aren’t
able to provide a fix for you, we would like to know which tablet models are
affected by this and other problems.
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