Brooktrout board returns error 318, what is it?

Link:  http://www.extracomm.com/Extracomm/FAQ.NSF/FAQs/c7633baa11e59bb6482570c3000fdfae
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Last Modified Date:  07/24/2013


Brooktrout Error 318 means: dial tone detected; usually indicates the dialing sequence did not break dial tone.

http://www.extracomm.com/extracomm/FAQ.NSF/740ef94ac62ac8a685256324006d4a58/1d85d6a58c05403b882567d8006808c4?OpenDocument


Possible solution:
The chance of getting Error 318 can be reduced by setting the busy_dt_ct parameter in btcall.cfg to 10.
Restart the computer after changing the btcall.cfg.