Article ID: 250649
Article Last Modified on 1/27/2007
APPLIES TO
- Microsoft Windows Millennium Edition
- Microsoft Windows 98 Second Edition
- Microsoft Windows 98 Standard Edition
- Microsoft Windows 95
This article was previously published under Q250649
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
SUMMARY
This article describes the Modem Settings registry key in the Windows Me/98/95 Registry. This key is located in
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Modem\xxxx\Settings
MORE INFORMATION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
The Settings key contains commands for configuring various modem settings. After the Init key commands are sent, Windows builds a dynamic configuration command string by concatenating various entries shown in the following table. The command depends on the settings selected in the modem's properties.
The following table describes the entries under the Settings registry key:
| Subkey | Description | Example |
|---|---|---|
| Prefix | Configuration command prefix | AT |
| Terminator | Configuration command suffix | <cr> |
| DialPrefix | Dial command prefix | D |
| Dial_Pulse | Use pulse dialing | P |
| Dial_Tone | Use tone dialing | T |
| Blind_Off | Detect dial tone before dialing | X4 |
| Blind_On | Do not detect dial tone before dialing | X3 |
| CallSetupFailTimeout | Specify call setup time-out | S7=<#> |
| InactivityTimeout | Specify inactivity time-out | S30=<#> |
| SpeakerVolume_Low | Low speaker volume | L1 |
| SpeakerVolume_Med | Medium speaker volume | L2 |
| SpeakerVolume_High | High speaker volume | L3 |
| SpeakerMode_Off | Speaker always off | M0 |
| SpeakerMode_Dial | Speaker on during dial and negotiation | M1 |
| SpeakerMode_On | Speaker always on | M2 |
| SpeakerMode_Setup | Speaker on only during negotiation | M3 |
| FlowControl_Off | No flow control | &K0 |
| FlowControl_Hard | Hardware flow control | &K1 |
| FlowControl_Soft | Software flow control | &K2 |
| ErrorControl_Off | Error control disabled (normal mode, not direct) | +Q6S36=3S48=128 |
| ErrorControl_On | Error control enabled (auto reliable) | +Q5S36=7S48=7 |
| ErrorControl_Forced | Error control required to connect (reliable) | +Q5S36=4S48=7 |
| ErrorControl_Cellular | Cellular protocol enabled | \N3-K1)M1-Q1*H1 |
| Compression_On | Compression enabled | S46=138 |
| Compression_Off | Compression disabled | S46=136 |
| Modulation_CCITT | Use CCITT modulations for 300 and 1200 bps | B0 |
| Modulation_Bell | Use Bell modulations for 300 and 1200 bps | B1 |
| SpeedNegotiation_Off | Connect only at default modem speed; do not fall back | N0 |
| SpeedNegotiation_On | Use lower DCE speed to connect, if necessary | N1 |
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