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Greame,
I think we're discussing two different issues:
1. Connections between the telescope (USB hub?) and a local PC.
2. Connection between a local PC (in the observatory?) and a semi-remote warm room (!) home/office PC.
#1 In the observatory none of the connections is greater than 3 - 5 mtr, I use a local power 7 connection USB hub mounted on the pier and only 2 USB cables back to the PC. Why 2 connections? One of my cameras doesn't like connecting through the hub.
#2 My observatory is about +/-16 mtr from the home office. I use the Cat5/6 cable between the observatory PC and the WIFI modem/router (NBN) in the home office and Teamviewer to "see" and operate the observatory PC.
I just have to open the roof, fire up the gear (EQMod, CdC, PHD2, AstroArt, FireCapture etc) then head back to the warmth of the home office.
Hope this helps.
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