USRobotics V.34 user manual Sets the duration, in seconds, for the pause

COURIER HIGH SPEED MODEMS

Register	Default	Function
S8	2	Sets the duration, in seconds, for the pause
		(,) option in the Dial command and the
		pause between command re-executions (>
		and A> commands).
S9	6	Sets the required duration, in tenths of a
		second, of the remote modem's carrier
		signal before recognition by the Courier.
S10	7	Sets the duration, in tenths of a second,
		that the modem waits after loss of carrier
		before hanging up. This guard time
		allows the modem to distinguish between
		a line hit, or other disturbance that
		momentarily breaks the connection, from a
		true disconnect (hanging up) by the
		remote modem.
		While we do not recommend connecting
		the modem to a line with call waiting, if
		you have call waiting you may wish to
		adjust this setting upward to prevent the
		modem from misinterpreting the signal for
		a second call as a disconnect by the remote
		modem. A better alternative is to contact
		your phone company to find out how to
		temporarily disable call waiting.
S11	70	Sets the duration and spacing, in
		milliseconds, of dialed tones.
S12	50	Sets the duration, in fiftieths of a second,
		of the guard time for the escape code
		(+++) sequence.

Summaries and Tables B-17