Black Box SW4007A-USB Further information, Troubleshooting, Summary of threats and solutions

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Further information

Troubleshooting

If you experience problems when installing or using the ServSwitch Secure unit, please check through this section for a possible solution. If your problem is not listed here and you cannot resolve the issue, then please refer to the ‘Getting assistance’ section.

No video from computer

This is most likely to be associated with having the wrong DDC data loaded into the ServSwitch. Computers often need read the correct DDC data before they will output a video signal. If digital DDC data is presented

to a computer’s analog video port, a video signal will not be generated. Conversely, if analog DDC data is presented to a computer’s digital video port, a video signal will also not be generated. Remember that the ServSwitch only reads the DDC data from your monitor when the ServSwitch is first powered on. To ensure that your monitor’s DDC data is read and stored correctly, ensure that it is attached and powered on when you switch on your ServSwitch.

Video from some computers only

Remember that the ServSwitch does not convert digital video signals to analog signals and vice versa so it is not generally possible to mix digital and analog inputs. Mixed systems are possible in certain special circumstances but these will require specialist assistance from Black Box technical support.

Summary of threats and solutions

This section provides a list of potential security threats that the ServSwitch Secure might face during operation and the special steps that have been taken to counteract them.

Threat

Solution

 

 

Microprocessor

Unidirectional data flow is enforced by

malfunction or

hardware “data diodes” so data isolation

unanticipated software

doesn’t rely on software integrity.

bugs causing data to flow

 

between ports.

 

 

 

Subversive snooping

Carefully shielded metal case with dual

by means of detecting

shielding in critical areas.

electromagnetic radiation

 

emitted from the

 

equipment.

 

 

 

Detection of signals

No connections to sensitive analog inputs

on one computer by

(such computer microphone ports) are

monitoring for crosstalk

provided. Minimum crosstalk separation

(leakage) signals on

of 60dB provided between signals from

another computer.

one computer and input or I/O signals to

 

another computer.

 

 

Malicious modification of

Data isolation is assured by hardware

microprocessor software

and so is not compromised by any

causing data to leak

changes to the microprocessor

between ports.

software. Microprocessors use one time

 

programmable memory so flash upgrades

 

are not possible. Case uses counter-sunk

 

screws which can be protected by tamper

 

proof seals.

 

 

Buffered data within a

Keyboard and mouse are powered down

keyboard or mouse is sent

and reset between each switchover to

to the wrong computer

ensure that all buffers are cleared out.

after switchover.

 

 

 

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Contents ServSwitch Secure and Secure Plus Contents Welcome IntroductionServSwitch Secure and Secure Plus features Secure PlusStandard items Additional items    Installation LocationsLinks overview Cabling recommendationsMounting Connections to computer systems Making connectionsTo connect a keyboard and mouse link Connecting video inputs To connect an analog video inputTo connect a keyboard and mouse Connections to user console peripheralsTo connect speakers Digital video display output ServSwitch Secure DDC policy Video display DDC informationConnection to power supply To connect the power supplyError indicator OperationSelecting computers Tamper-evident sealsCustom configuration service Using the smart card readerSmart card reader Smart Card SecuritySummary of threats and solutions TroubleshootingFurther information Darted around the screen randomly clicking Getting assistance UK +44 0118 965Safety information Certification notice for equipment used in CanadaRadio Frequency Energy European EMC directive 89/336/EECFCC Compliance Statement United States Canadian Department of Communications RFI statementNormas Oficiales Mexicanas NOM electrical safety statement Instrucciones de seguridad     BlackBox subsidiary contact details Country Web Site/Email Phone Fax