US Robotics 56K USB Modem User Manual page 107

S28—V.34 Modulation Enable/Disable
This register enables/disables V.34 modulation.
Range: 0—1.
• Default: 1.
Table 216. S28 Values
Value
0 Disables V.34 modulation.
1 Enables V.34 modulation.
S30—Inactivity Timer
This register specifies the length of time in minutes that the modem must wait before disconnecting when
no data is sent or received. This function is only applicable to buffer mode.
Note: This register's default value may vary based on country selection.
Range: 0—255.
• Default: 0 (disabled)*.
• Units: minutes.
S32—Synthetic Ring Volume
S32 specifies the synthetic ring volume. It provides a synthetic ring volume in dB with an implied minus
sign. The default is 10.
Range: 0—255.
• Default: 10.
• Units: dB.
S33—Synthetic Ring Frequency
This register specifies a synthetic ring frequency. Register values from one to five select a unique ring
frequency.
Range: 0—5.
• Default: 0 (disabled).
* The register default shown here is for North America.
Function
56K USB Modem
User Guide
Command Reference - 101