Specifications

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KVM Extension Solutions
Rackmount CATx KVM
Extender Hubs with Serial and
Bidirectional Stereo Audio
KVM Serial and audio extensions
up to 300 metres — plus dual-
access and rackmount options!
• Combines six entenders in one box.
• Send keyboard, monitor, mouse, serial and
bidirectional stereo audio signals up to
300 metres from a CPU or ServSwitch.
• Dual-access capability enables the
connection of two KVM consoles to each
CPU.
• Fully adjustable video equalisation for the
best possible video quality.
• Hub and remote units feature built-in
surge protection on the CATx link side.
ServSwitch USB CATx KVM
Extenders
Extend your VGA and most HID
devices to up to 300 metres on
CATx cable.
Solution Profile
Get your house in order
A government organisation was experiencing several problems in an open office of around a
hundred people, including heat, noise and occasional security issues. They wanted a way to reduce
the temperature — without having to install expensive air conditioning across the whole office
floor — , decrease the ambient noise and secure the servers without having any effect on the
productivity of the office.
The Black Box KVM extender range was employed to solve all the problems at once. The servers
were moved into a single air-conditioned room which meant that the ambient temperature on the
main offfice floor dropped by as much as 3 degrees! The ambient noise level also dropped as a
direct result of removing one hundred power supply fans, hard drives and CD drives from the main
office space. Lastly, security was improved as servers were now stored securely and access to them
was far easier to manage and monitor.
• True DDC support either emulates or
transfers DDC from attached monitors.
• Supports USB hubs at remote end.
• Dual-head video models available, too.
• Optional RS-232/V.24 and bidirectional
stereo audio versions also available.
• Flash-upgradable for future compatibility
and enhancements.
• 19” rackmountable.
• Easy keyboard adjustable video
equalisation.
• Intelligent keyboard/mouse emulation
provides keep-alive functionality.
• Colour skew compensation supports CAT5,
CAT5e, CAT6 and CAT7 cables.
• Surge protection on the CAT5 link and
flash upgrade safeguards investments.
CATx KVM Extender Kit with
Built-in DeSkew and Multivideo
Support
Cutting-edge KVM extension over
twisted pair.
Black Box Explains
CAT5: When more isn’t always better.
In data communications applications, using products that exceed
required capacities is usually not a problem. For example, if a 28.8K
modem is required, a 33.6K or 56K model will work just fine.
But sometimes, more isn’t better. Take KVM extenders designed to
expect CAT5 and only CAT5 cable. You’d expect that Category 3 cable
wouldn’t be effective with these products, an you would be right. But
you may also assume that if Category 5 cable works fine, Category 5e,
Category 6 and other higher capacity cables would work even better.
Unfortunately, this is not always the case, and here’s why:.
KVM extenders from many manufacturers, including ServSwitch
CAT5 KVM Extenders, have been historically designed for the Category
5 specs defined by the TIA/EIA standard. Higher-level cables, such as
Category 5e, have different characteristics and specifications.
Differences - specifically twist ratios - might seem small, but they can
have a negative impact on these extenders, especially over longer
distances and at higher resolutions. This effect is called DeSkew. Black Box
offers DeSkew components to compensate for these negative impacts.
Shielding might have negative impact on analogue video transmission
over structured cable. Based on practical experience, Black Box
recommends not to use PiMF cable (Pair in Metal Foil) such as higher
rated CAT6 and all CAT7 cables, because it causes smearing that can’t be
compensated on longer distances (>40km).
Find out more about our CATx KVM Extender Hubs at www.blackbox.nl.
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