Data Modem INF File Entries

All modems provide data modem features. This section describes the modem INF file entries that create registry subkeys and values identifying the features of specific data modems.

In this section

TopicDescription

Answer

The Answer entry specifies the AT command that is sent to the modem to answer a data call.

CompatibilityFlags

The CompatibilityFlags entry directs Unimodem to lower DTR and to then wait 50 ms before closing the communications port.

DCB

The DCB entry locks the modem's port speed to a specific default. It also controls XON/XOFF software flow-control settings.

Note  

The ProCalc tool, which is included in the Microsoft Windows Driver Kit (WDK), should be used to create this entry. For more information about ProCalc, see Using ProCalc. For more information about using ProCalc to create this entry, see Locking the Port Speed (DCB).

Hangup

The Hangup entry specifies the AT command that is used to disconnect a call after Unimodem puts the modem into command mode.

InactivityScale

The InactivityScale entry specifies the scale value for InactivityTimeout. The equation for inactivity time-out is as follows:

InactivityTimeout * InactivityScale = inactivity time-out in seconds

Init

Use the Init entry to specify the AT commands that are sent to initialize a modem.

Monitor

The Monitor entry defines the AT command that directs the modem to report all incoming calls. A modem normally reports incoming calls through a RING response.

Properties

The Properties entry defines a set of modem properties that are contained in a binary structure. Unimodem uses this modem properties structure to respond to the GetCommProperties function.

Note   The ProCalc tool, which is included in the Microsoft Windows Driver Kit (WDK), should be used to create this entry. For more information about ProCalc, see Using ProCalc. For more information about using ProCalc to create this entry, see Data Profile.

Reset

The Reset entry specifies the command string that Unimodem sends to the modem to return it to a base configuration that is compatible with communications programs for MS-DOS and Windows operating systems.

Responses

Use Responses entries to specify the response strings that Unimodem is programmed to receive from the modem.

Note  The ProCalc tool, which is included in the Microsoft Windows Driver Kit (WDK), should be used to create this entry. For more information about ProCalc, see Using ProCalc. For more information about using ProCalc to create this entry, see Response State.

Settings Entries in Modem INF Files

The following topics describe registry entries that are subkeys of the Settings INF file entry.

Data Modem INF File Entries for Windows 2000 and Later Versions

This section contains descriptions of INF file entries that are supported by Windows 2000 and later versions of the operating system.

 

 

 

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