Further information
49
· G&D DL-DVI-Vision-CAT
Transmission of USB data of ARU2 variants
The USB 2.0 signals of the
ARU2
variant of the
DL-DVI-Vision
system are also trans-
mitted via category 5e (or better) twisted pair cables.
Depending on the wire gauge and the type of twisted pair cable, the following dis-
tances can be bridged between computer module and user module:
The following cables achieved the best results during test operation:
up to 100 metres:
Dätwyler uninet ® 5502 S-STP (AWG 24)
up to 80 metres:
Dätwyler uninet ® 7702 Flex (AWG24)
DDC transmission with cache function
The KVM extender supports
Enhanced-DDC
(Enhanced Display Data Channel) to read
out the data from the monitor that is connected to the user module and transmit
them to the computer. This data includes information regarding the preferred reso-
lution and the supported monitor frequencies.
To make sure that the computer connected to the computer module
(
DL-DVI-Vision-CAT-CPU
) can already access the features of the remote monitor during
booting, the KVM extender contains a cache function. Even when the computer
module or the user module are switched off or the devices are not interconnected,
the properties of the most recently connected monitor or a default data block are
provided in the KVM extender.
The monitor’s DDC information is usually transmitted one-to-one to the computer.
Should the KVM extender determine that the display cannot be read without errors
or that the entries are invalid, the information is completed or corrected (if possible).
Wire gauge
Cable type
Category
Recommendation
AWG 22
Installation cable
5e, 6 or 7
up to 100 m
AWG 24
Installation cable
5e, 6 or 7
up to 100 m
AWG 26
Patch cable
5e, 6 or 7
up to 80 m
