US Robotics 56K USB Modem User Manual page 26

S<register number>=<value>—S Register Control
Use this command to view or change an S-register. S-registers contain parameters used by the modem.
This command has two forms, one to show the contents of the register and the other to change the
contents of the register. Some registers are read only and are not affected by the S<register
number>=<value> command. Each register has a specific function (see Table 212 on page 95).
Result codes:
• OK if <register number> is a valid register
• ERROR if <register number> is not a valid register.
Table 16. S<register number> Extended Syntax Commands
Syntax
S<register number>?
S<register number>=<value>
T—Select Tone Dialing
Use this command to configure the modem for DTMF tone dialing. All subsequent D<dial string>
commands use tone dialing until either the P command or a pulse dial modifier is received by the modem.
Tone dialing is the default setting. This command does not use parameters and generates an ERROR
result code when parameters are attached to the command.
V<value>—DCE Response Format
Controller-based modems generate result codes using one of two formats. Verbose mode generates result
codes in the familiar text formats using words. Numerical mode generates result codes as a number. Each
result code has a number assigned to it (page 107). Use this command to switch between numerical and
verbose modes. Call progress and negotiation progress messages are affected by this command.
Result codes:
• OK if <value> = 0—1.
ERROR if <value> ≠ 0—1.
•
Table 17. V<value> Commands
Command
V0 Displays result codes as digits.
V1 Displays result codes as text (default).
Table 18. V<value> Result Code Formats
Command
V0 <numeric code><CR>
V1 <CR><LF><verbose code><CR><LF>
Displays register contents.
Sets the contents of the register to <value> if the register is not
read only.
Function
Result Code Format
56K USB Modem
Function
Command Reference - 20
User Guide