Black Box ACU3009A Specifications download pdf (Page 51)

SERVSWITCH™ BRAND CAT5 KVM MICRO EXTENDER

8.1.4 S

ERIAL

EVICE

(ACU3022A KVM/S

ERIAL

UDIO

YSTEMS

NLY

)

The CPU doesn’t detect the serial device I’m trying to use with it.

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 type of flow control.

The CPU doesn’t seem to receive anything from its serial device or vice versa.

1. If possible, attach the serial device directly to the CPU. If it works, skip to #2.

If it doesn’t, is the device actually standard RS-232? Is it a device the CPU

supports? Is a driver for the device loaded, or is software running, that enables

the CPU to recognize input from the device?

2. Check the serial cables. Are they intact along their length and securely

connected at both ends?

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.

The CPU receives garbage from its serial device or vice versa.

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.

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Black Box ACU3009A Specifications Page 51