Guntermann & Drunck CATVision-USB 2.0 - Handbuch (Seite 38)

Appendix
15 · G&D CATVision-USB 2.0
Appendix
Recommendations for twisted pair cables
All signals of the CATVision system are transmitted via twisted pair cables (category
5 or better).
The data transmission is reliable over a distance of at least 70 meters using a regular
standard twisted pair cable (category 5e or better). The distance that can actually be
bridged depends on the quality of the applied cable.
High-quality S-STP cables with an AWG24 wire gauge coding can bridge a distance
of up to 100 meters. Patch cables with an AWG26 wire gauge coding can only
bridge a maximum of 70 meters.
In order to ensure a reliable operation even in difficult environments, installation
cables with at least AWG24 coding have to be used to bridge lengths over 70 meters:
The following cables achieved the best results during test operation under labotary
conditions:
 up to 70 meters: Dätwyler uninet® 7702 flex 4P (AWG 26)
 up to 100 meters: Dätwyler uninet® 5502 4P / 2x4P BD (AWG 24)
NOTE: It is permitted to connect several segments of a cable connection with patch
panels and connection ports. It is, however, not permitted to connect active com-
ponents such as network switches, hubs or repeaters are not permitted.
Wire gauge Cable type Category Recommendation
AWG 24 Installation cable 5e, 6 or 7 up to 100 meters
AWG 26/27 Patch cable 5e, 6 or 7 up to 70 meters
IMPORTANT: Devices of the CATVision-USB 2.0 series without Delay function permit
a maximum runtime delay (skew) of 3 ns per transmission circuit.
Devices which contain the Delay function enable the application of twisted pair
cables with a runtime delay of up to 46 ns.