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USB keyboard and mouse connections

Some systems, such as certain laptop PC's, Apple

and Sun

workstations use USB connections to link their keyboards

and mice.

Recognizing a USB connection

USB (Universal Serial Bus) plugs and sockets look like this:

USB plug

USB

Your AdderView Omega includes two special adaptors which allow

you to use it with systems that use USB keyboard and mouse

connections. You can then use your standard PC keyboard and mouse

to control any pairing of PC, laptop, Mac or Sun workstation. Each

adaptor attaches to the keyboard plug of the KVM cable set and then

connects to a USB socket on the system.

To make a USB keyboard and mouse connection

Follow the standard connection

instructions given previously,

however at step 6:

i Connect the USB adaptor

to the keyboard plug

(purple plug with

logo) on the

KVM cable set.

ii Connect the USB adaptor to a free USB socket on the system. In

such cases the mouse plug usually remains unconnected and all

mouse data is transferred through the USB connection, via the

keyboard cable. Note: If the mouse plug (from the KVM cable set)

is connected, then mouse data will be sent through it rather than

the USB connection.

iii Connect the monitor plug from the KVM cable set to the

appropriate video socket as usual.

iv Continue with steps 7, 8 and 9 of the standard connection

instructions.

Mac

computers

socket and

symbol

Issues and limitations for USB connections

Switching delays when using two USB connected systems

Your AdderView Omega contains a single USB processor that, in

conjunction with the cable adaptor(s), handles the communication

between the keyboard/mouse, and the connected system(s). When a

single computer is connected via USB, the channel switchover time

between that and the second (non-USB) system is instantaneous.

However, when two systems are connected via USB, during channel

switchover, there will be a short delay (roughly 2 seconds) while the

USB processor rearranges (enumerates) itself for the new channel.

When using two USB-connected systems, the computers will detect

when your AdderView Omega makes the changeover. The computer

being switched to will automatically enumerate itself - this process

usually takes between 2 and 5 seconds, during which time the

computer will indicate on screen that it is busy. Certain operating

systems are sensitive to interruption during this process, so your

AdderView Omega employs a 5 second 'guard delay'. The guard delay

rejects any subsequent channel switching requests until the

enumeration process is complete, thus ensuring reliable switching.

Support for extra keys and country codes on Sun keyboards

As supplied, your AdderView Omega supports all of the keys of a

standard PS/2 keyboard, however, certain Sun workstation keyboards

contain extra function keys. You can add support for these using

special driver software that is available for download from the Adder

website. When downloaded into the Omega, the driver software

enables you to simulate the extra Sun keys using key combinations on

your PS/2 style keyboard. The downloadable drivers also generate the

country code that informs the Sun system, which type of keyboard is

connected. Please refer to the flash upgrade section within the Special

features chapter for more information.

Using two USB connected systems with different keyboard types

The single USB processor within your AdderView Omega can be

configured for a single USB keyboard type at any one time. If you have

two USB connected systems that cannot be made to accept the same

keyboard type, then you need to use an Adder intelligent USB

converter cable. Please contact your AdderView Omega supplier for

more details.