Toshiba V.90 - Manual (Page 62)

S-Registers
S-Register values
43
S8 Comma pause time
This register sets the time, in seconds, that the modem must pause
when it encounters a comma (,) in the dial command string.
S10 Automatic disconnect delay
This register sets the length of time, in tenths of a second, that the
modem waits before hanging up after a loss of carrier. This allows
for temporary carrier loss without causing the local modem to
disconnect.
The actual interval the modem waits before disconnection is the
value in register S10.
Range: 1-255
Default: 50
Units: seconds
Range: 0-65
Default: 2
Units: seconds
Range: 1-254
Default: 20
Units: .1 seconds