Brooktrout board returns error 318, what is it?

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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.

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.