Talk:Copper cable certification

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Wikify[edit]

I'm removing the wikify tag. I believe this article may conform enough now to be considered a wiki. It does still need inline citations, but I believe that is something else altogether.Bgautrea (talk) 05:18, 21 April 2008 (UTC)[reply]

Where is the characteristic impedance?[edit]

Where is the characteristic impedance? I'm thinking its 110 Ohms. Cat 4 article claims token ring but shielded twisted pair is ~200 Ohms, not a match for the token ring card. My network cabling tester test impedance; common problem pulling cable is stretching changes twists per inch and the impedance change causes interference in the HF signals on the cable. Shouldn't there also be a reference to coax cable (which is also copper based), which was used for Ethernet, Arcnet, et al. Shjacks45 (talk) 04:18, 27 June 2013 (UTC)[reply]

Where is the characteristic impedance?[edit]

Where is the characteristic impedance? I'm thinking its 110 Ohms. Cat 4 article claims token ring but shielded dual twisted pair is ~200 Ohms, not a match for the token ring card. My network cabling tester test impedance; common problem pulling cable is stretching changes twists per inch and the impedance change causes interference in the HF signals on the cable. Shouldn't there also be a reference to coax cable (which is also copper based), which was used for Ethernet, Arcnet, et al. Shjacks45 (talk) 04:34, 27 June 2013 (UTC)[reply]