| 单词 | busy |
| 释义 | busy The condition that exists when a central office (CO), PBX, destination telephone circuit, or other voice telecommunications component is in use at its full capacity and not available to accept additional calls. If a caller attempts to place a call to a device that is in a busy condition, the device returns a busy signal in the backward direction. For a telephone, busy is the same as off hook. See also busy signal. |
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