US Robotics 56K USB Modem User Manual page 32

&P<value>—Pulse Dial Make-to-Break Ratio Selection
Use this command to select the make-to-break ratio. This command is effective only for Japan.
Result codes:
• OK if <value> = 0—2.
ERROR if <value>n ≠ 0—2.
•
Table 32. &P<value> Commands for Domestic Versions
Command
&P0 Selects 39%—61% make/break ratio at 10 pulses per second.
&P1 Selects 33%—67% make/break ratio at 10 pulses per second (default).
&P2 Selects 33%—67% make/break ratio at 20 pulses per second.
&Q<value>—Asynchronous Communications Mode
This command is supported to ensure backward compatibility with communication software that issues the
&Q<value> command. The preferred method for changing the asynchronous communication mode is to
use the \N<error control mode> command.
Result codes:
• OK if <value> = 0, 5, 6, 8, or 9.
ERROR if <value> ≠ 0, 5, 6, 8, or 9.
•
Table 33. &Q<value> Commands
Command
&Q0 Asynchronous mode, buffered. Same as \N0.
&Q5 Error control mode, buffered (default). Same as \N3.
&Q6 Asynchronous mode, buffered. Same as \N0.
&Q8 MNP error control mode. If an MNP error control protocol is not established, the modem
falls back according to the current user setting in register S36.
&Q9 V.42 or MNP error control mode. If neither error control protocol is established, the
modem falls back according to the current user setting in register S36.
&S<value>—Data Set Ready (DSR) Option
Use this command to controls DSR action.
Result codes:
• OK if <value> = 0—1.
ERROR if <value> ≠ 0—1.
•
Table 34. &S<value> Commands
Command
&S0 DSR is always on (default).
&S1 DSR comes on after establishing a connection and goes off when the connection ends.
Function
Function
Function
56K USB Modem
User Guide
Command Reference - 26