Bell wire: Difference between revisions
(Be clearer on microfilters. Add table for pin allocation) |
m (Get the table headings in the right order.) |
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| 1 || || ''For non-telephone facility'' ??
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| 2 || 'B' wire || Used to be guaranteed more negative voltage than 'A' wire
| 4 || Local earth || ''Needed for 'C' wire signalling, which is obsolete''
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| 5 || 'A' wire ||
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| 6 || 'C' wire || '' 'C' wire signalling is obsolete''
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