As Jay mentions, the correct patch cable type for DS3s is 734 or 735. The connectors must be true 75 ohm or there will be reflections to and from the cable (think antennas and ghosting), probably resulting in lower signal to noise ratios, etc. Never use 50 ohm connectors or cables for this application.
We have both built and bought cables, with excellent results. We sourced single and multiple circuit 734 cables from large cable vendors, and I hand-terminated them Canare 75 ohm BNCs with Canare stripping and crimping tools. We have also bought assembled RG6 cables (Belden type 1694 type) terminated with Kings connectors from Markertek and they seem to work perfectly. These are listed as HDTV cables. (We also bought the Canare connectors and tools from Markertek. Canare also makes excellent cabling, equal to or better than Belden.) http://www.markertek.com/ http://www.markertek.com/SearchProduct.asp?item=1694%2DB%2DB%2D3&off=18&sort=prod The key principles are that the connectors must be 75 ohm, and the larger diameter 75 ohm cables have lower losses per unit distance. The larger cables are also quite stiff, so use large bend radii, etc. The telco type 734 and 735 seem to have tougher and thicker jackets than commercial coax cables. Jeff C. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
