Temporarily out of service or phone off the hook or the "trunk" across which calls travel is busy. The signal is called a reorder tone. https://en.wikipedia.org/wiki/Busy_signal
Means it’s off the hook
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Temporarily out of service or phone off the hook or the "trunk" across which calls travel is busy. The signal is called a reorder tone. https://en.wikipedia.org/wiki/Busy_signal
Means it’s off the hook