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| Thread ID: 71582 | 2006-08-09 23:22:00 | Phone buzz | linw (53) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 477505 | 2006-08-13 08:14:00 | That was one length of inaccessible cable so you don't know what its condition was. By good fortune I did know the condition, I installed it myself about 12 years previously during renovations. Balance has got nothing to do with whether a pair is twisted.Ordinarily I would agree with you Graham, provided we were dealing with a transmission line with no external influences to affect its impedance, but we are talking about a common or garden telephone line here. In this context, twisting the cable pair helps balance the overall impedance characteristics of the line and also cancels out external noise, which sounds like the issue in this instance because "buzz" suggests a frequency well below anything to do with any adsl signals. It might have been supported by mains wires. ;) You don't know.Sadly, I do know, :blush: because I was lazy when installing and ran the wires in a close relationship with power cabling for a short distance, because the route was at the interface between the original house and the extensions and access was very limited. Cheers Billy 8-{) |
Billy T (70) | ||
| 477506 | 2006-08-13 09:52:00 | Excellent info, Graham. You are right, the first and simplest thing to do is to isolate the ringer wire. Will do that tomorrow. Also right about the fact that modern phones are not "real" phones! I bet they don't load the line much, either. |
linw (53) | ||
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