| 单词 | tip and ring |
| 释义 | tip and ring The term tip and ring originated in the cordboard plugs that establish the connection between the copper wire pairs. The tip of the plug connects to the electrically positive (+) wire, and the ring, or seat of the plug, to the electrically negative (–) wire.The ring supports the return path to the central office, for example. If the pair is shielded or if there is a ground wire, the ground is the sleeve and the correct term is tip ring sleeve. The term is still used extensively to identify the positive and negative wires in a pair. See also ground. |
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