On Sat, Feb 07, 2004 at 12:45:03PM +0100, Joern Nettingsmeier wrote: > the idea is to run an eight-way symmetric audio multicore (shielded > pairs and an outer foil shield as well) along with 4x cat5 s/stp > cables carrying 10/100/1000baseTX ethernet in the same cable duct > over a length of about 15-20 meters. > > will this lead to problems in the audio signal? Twisted pair ethernet is a balanced signal so should radiate little. If your audio system is balanced too that will help. With three shields between the audio and the ethernet twisted pair I doubt if you'll experience problems. You don't mention whether the audio cable will be carrying microphone signals or only line level - that makes a big difference! If you're really paranoid you could use star-quad audio cable. That has four cores instead of two and much better inference rejection than twisted pair. -- Anahata anahata@xxxxxxxxxxxxxx -+- http://www.treewind.co.uk Home: 01638 720444 Mob: 07976 263827