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WMI Libraly > Win32_POTSModem Class

Win32_POTSModem Class

The Win32_POTSModem class represents the services and characteristics of a Plain Old Telephone Service (POTS) modem on a Win32 system.
Namespace value is root/CIMV2.
WMI Provider value is CIMWin32.


Properties

  • AnswerMode
  • Answer mode defines the current auto-answer/call-back setting for the modem.

  • AttachedTo
  • The AttachedTo property indicates the port to which the POTS modem is attached.
    Example: COM1.

  • Availability
  • The availability and status of the device. For example, the Availability property indicates that the device is running and has full power (value=3), or is in a warning (4), test (5), degraded (10) or power save state (values 13-15 and 17). Regarding the power saving states, these are defined as follows: Value 13 ("Power Save - Unknown") indicates that the device is known to be in a power save mode, but its exact status in this mode is unknown; 14 ("Power Save - Low Power Mode") indicates that the device is in a power save state but still functioning, and may exhibit degraded performance; 15 ("Power Save - Standby") describes that the device is not functioning but could be brought to full power 'quickly'; and value 17 ("Power Save - Warning") indicates that the device is in a warning state, though also in a power save mode.

  • BlindOff
  • The BlindOff property contains the command string used to detect a dial tone before dialing.
    Example: X4.

  • BlindOn
  • The BlindOn property contains the command string used to dial whether or not there is a dial tone.
    Example: X3.

  • Caption
  • The Caption property is a short textual description (one-line string) of the object.

  • CompatibilityFlags
  • The CompatibilityFlags property lists all modem connection protocols with which this modem device is compatible.

  • CompressionInfo
  • Describes the data compression characteristics of the modem.

  • CompressionOff
  • The CompressionOff property contains the command string used to disable hardware data compression.
    Example: S46=136.

  • CompressionOn
  • The CompressionOn property contains the command string used to enable hardware data compression.
    Example: S46=138.

  • ConfigManagerErrorCode
  • Indicates the Win32 Configuration Manager error code. The following values may be returned:
    0 This device is working properly.
    1 This device is not configured correctly.
    2 Windows cannot load the driver for this device.
    3 The driver for this device might be corrupted, or your system may be running low on memory or other resources.
    4 This device is not working properly. One of its drivers or your registry might be corrupted.
    5 The driver for this device needs a resource that Windows cannot manage.
    6 The boot configuration for this device conflicts with other devices.
    7 Cannot filter.
    8 The driver loader for the device is missing.
    9 This device is not working properly because the controlling firmware is reporting the resources for the device incorrectly.
    10 This device cannot start.
    11 This device failed.
    12 This device cannot find enough free resources that it can use.
    13 Windows cannot verify this device's resources.
    14 This device cannot work properly until you restart your computer.
    15 This device is not working properly because there is probably a re-enumeration problem.
    16 Windows cannot identify all the resources this device uses.
    17 This device is asking for an unknown resource type.
    18 Reinstall the drivers for this device.
    19 Your registry might be corrupted.
    20 Failure using the VxD loader.
    21 System failure: Try changing the driver for this device. If that does not work, see your hardware documentation. Windows is removing this device.
    22 This device is disabled.
    23 System failure: Try changing the driver for this device. If that doesn't work, see your hardware documentation.
    24 This device is not present, is not working properly, or does not have all its drivers installed.
    25 Windows is still setting up this device.
    26 Windows is still setting up this device.
    27 This device does not have valid log configuration.
    28 The drivers for this device are not installed.
    29 This device is disabled because the firmware of the device did not give it the required resources.
    30 This device is using an Interrupt Request (IRQ) resource that another device is using.
    31 This device is not working properly because Windows cannot load the drivers required for this device.

  • ConfigManagerUserConfig
  • Indicates whether the device is using a user-defined configuration.

  • ConfigurationDialog
  • The ConfigurationDialog property contains the modem initialization string. This property is comprised of command strings from other members of this class.

  • CountriesSupported
  • CountriesSupported is an array (bag) that contains a set of strings defining the countries/regions in which the modem can operate.

  • CountrySelected
  • CountrySelected is a string value defining the country/region for which the modem is currently programmed. When multiple countries/regions are supported, this property defines which one is currently selected for use.

  • CreationClassName
  • CreationClassName indicates the name of the class or the subclass used in the creation of an instance. When used with the other key properties of this class, this property allows all instances of this class and its subclasses to be uniquely identified.

  • CurrentPasswords
  • CurrentPasswords is an array (bag) containing the currently defined passwords for the modem. This array may be left blank for security reasons.

  • DCB
  • The Device Control Block (DCB) property contains the control settings for a serial communications device, in this case, the modem device.

  • Default
  • The Default property indicates whether this POTS modem is the default modem on the Win32 computer system.

  • Description
  • The Description property provides a textual description of the object.

  • DeviceID
  • The DeviceID property contains a string uniquely identifying this POTS modem from other devices on the system.

  • DeviceLoader
  • The DeviceLoader property indicates the name of the device loader for the modem. A device loader loads and manages device drivers and enumerators for a given device.

  • DeviceType
  • The DeviceType property indicates the physical type of the modem.

  • DialType
  • DialType is an integer indicating whether tone (value=1) or pulse dialing (value=2) is used. "Unknown" (0) can also be defined.

  • DriverDate
  • The DriverDate property indicates the date of the modem driver.

  • ErrorCleared
  • ErrorCleared is a boolean property indicating that the error reported in LastErrorCode property is now cleared.

  • ErrorControlForced
  • The ErrorControlForced property contains the command string used to enable error correction control when establishing a connection. This increases the reliability of the connection.
    Example: +Q5S36=4S48=7.

  • ErrorControlInfo
  • Describes the error correction characteristics of the modem.

  • ErrorControlOff
  • The ErrorControlOff property contains the command string used to disable error control.
    Example: +Q6S36=3S48=128.

  • ErrorControlOn
  • The ErrorControlOn property contains the command string used to enable error control.
    Example: +Q5S36=7S48=7.

  • ErrorDescription
  • ErrorDescription is a free-form string supplying more information about the error recorded in LastErrorCode property, and information on any corrective actions that may be taken.

  • FlowControlHard
  • The FlowControlHard property contains the command string used to enable hardware flow control. Flow control consists of signals sent between computers that verify that both computers are ready to transmit or receive data.
    Example: &K1.

  • FlowControlOff
  • The FlowControlOff property contains the command string used to disable flow control. Flow control consists of signals sent between computers that verify that both computers are ready to transmit or receive data.
    Example: &K0.

  • FlowControlSoft
  • The FlowControlSoft property contains the command string used to enable software flow control. Flow control consists of signals sent between computers that verify that both computers are ready to transmit or receive data.
    Example: &K2.

  • InactivityScale
  • The InactivityScale property is a multiplier used with the InactivityTimeout property to calculate the timeout period of a connection.

  • InactivityTimeout
  • InactivityTimeout defines the time limit (in seconds) for automatic disconnection of the phone line, if no data is exchanged. A value of 0 indicates that this feature is present but not enabled.

  • Index
  • The Index property indicates the index number for this POTS modem.
    Example: 0

  • InstallDate
  • The InstallDate property is datetime value indicating when the object was installed. A lack of a value does not indicate that the object is not installed.

  • LastErrorCode
  • LastErrorCode captures the last error code reported by the logical device.

  • MaxBaudRateToPhone
  • Defines the maximum settable communication speed for accessing the phone system.

  • MaxBaudRateToSerialPort
  • Defines the maximum settable communication speed to the COM port for an external modem. Enter 0 if not applicable.

  • MaxNumberOfPasswords
  • MaxNumberOfPasswords specifies the number of passwords definable in the modem itself. If this feature is not supported, enter 0.

  • Model
  • The Model property indicates the model of this POTS modem.
    Example: Sportster 56K External.

  • ModemInfPath
  • The ModemInfPath property indicates the path to this modem's .inf file. This file contains initialization information for the modem and its driver.
    Example: C:\WINNT\INF.

  • ModemInfSection
  • The ModemInfSection property indicates the name of the section in the modem's .inf file that contains information about the modem.

  • ModulationBell
  • The ModulationBell property contains the command string used to instruct the modem to use Bell modulations for 300 and 1200 bps.
    Example: B1.

  • ModulationCCITT
  • The ModulationCCITT property contains the command string used to instruct the modem to use CCITT modulations for 300 and 1200 bps.
    Example: B0.

  • ModulationScheme
  • Describes the modulation scheme of the modem.

  • Name
  • The Name property defines the label by which the object is known. When subclassed, the Name property can be overridden to be a Key property.

  • PNPDeviceID
  • Indicates the Win32 Plug and Play device ID of the logical device. Example: *PNP030b

  • PortSubClass
  • The PortSubClass property contains the string definingthe port used for this modem.

  • PowerManagementCapabilities
  • Indicates the specific power-related capabilities of the logical device. The array values, 0="Unknown", 1="Not Supported" and 2="Disabled" are self-explanatory. The value, 3="Enabled" indicates that the power management features are currently enabled but the exact feature set is unknown or the information is unavailable. "Power Saving Modes Entered Automatically" (4) describes that a device can change its power state based on usage or other criteria. "Power State Settable" (5) indicates that the SetPowerState method is supported. "Power Cycling Supported" (6) indicates that the SetPowerState method can be invoked with the PowerState input variable set to 5 ("Power Cycle"). "Timed Power On Supported" (7) indicates that the SetPowerState method can be invoked with the PowerState input variable set to 5 ("Power Cycle") and the Time parameter set to a specific date and time, or interval, for power-on.

  • PowerManagementSupported
  • Boolean indicating that the Device can be power managed - ie, put into a power save state. This boolean does not indicate that power management features are currently enabled, or if enabled, what features are supported. Refer to the PowerManagementCapabilities array for this information. If this boolean is false, the integer value 1, for the string, "Not Supported", should be the only entry in the PowerManagementCapabilities array.

  • Prefix
  • The Prefix property indicates the dialing prefix used to access an outside line.

  • Properties
  • The Properties property is a string array that lists all the properties (and their values) for this modem.

  • ProviderName
  • The ProviderName property indicates the network path to the computer that provides the modem services.

  • Pulse
  • The Pulse property contains the command string used to instruct the modem to use pulse mode for dialing. Pulse dialing is necessary for phone lines that are unable to handle tone dialing.
    Example: P.

  • Reset
  • The Reset property contains the command string used to reset the modem for the next call.
    Example: AT&F.

  • ResponsesKeyName
  • The ResponsesKeyName property contains the response this modem might report to the operating system during the connection process. The first two characters specify the type of response. The second two characters specify information about the connection being made. The second two characters are used only for Negotiation Progress or Connect response codes. The next eight characters specify the modem-to-modem line speed negotiated in bits per second (bps). The characters represent a 32-bit integer doubleword format (byte and word reversed). The last eight characters indicate that the modem is changing to a different port or Data Terminal Equipment (DTE) speed. Usually this field is not used because modems make connections at a "locked" port speed regardless of the modem-to-modem or Data Communications Equipment (DCE) speed.

  • RingsBeforeAnswer
  • Number of rings before the modem answers an incoming call.

  • SpeakerModeDial
  • The SpeakerModeDial property contains the command string used to turn the modem speaker on after dialing a number, and turning the speaker off when a connection has been established.
    Example: M1.

  • SpeakerModeOff
  • The SpeakerModeOff property contains the command string used to turn the modem speaker off.
    Example: M0.

  • SpeakerModeOn
  • The SpeakerModeOn property contains the command string used to turn the modem speaker on.
    Example: M2.

  • SpeakerModeSetup
  • The SpeakerModeSetup property contains the command string used to instruct the modem to turn the speaker on (until a connection is established).
    Example: M3.

  • SpeakerVolumeHigh
  • The SpeakerVolumeHigh property contains the command string used to set the modem speaker to the highest volume.
    Example: L3.

  • SpeakerVolumeInfo
  • Describes the volume level of the audible tones from the modem. For example, high, medium or low volume can be reported (values 3, 4 or 5, respectively).

  • SpeakerVolumeLow
  • The SpeakerVolumeLow property contains the command string used to set the modem speaker to the lowest volume.
    Example: L1.

  • SpeakerVolumeMed
  • The SpeakerVolumeMed property contains the command string used to set the modem speaker to a medium volume.
    Example: L2.

  • Status
  • The Status property is a string indicating the current status of the object. Various operational and non-operational statuses can be defined. Operational statuses are "OK", "Degraded" and "Pred Fail". "Pred Fail" indicates that an element may be functioning properly but predicting a failure in the near future. An example is a SMART-enabled hard drive. Non-operational statuses can also be specified. These are "Error", "Starting", "Stopping" and "Service". The latter, "Service", could apply during mirror-resilvering of a disk, reload of a user permissions list, or other administrative work. Not all such work is on-line, yet the managed element is neither "OK" nor in one of the other states.

  • StatusInfo
  • StatusInfo is a string indicating whether the logical device is in an enabled (value = 3), disabled (value = 4) or some other (1) or unknown (2) state. If this property does not apply to the logical device, the value, 5 ("Not Applicable"), should be used.

  • StringFormat
  • The StringFormat property describes the type of characters used for text passed through the modem.

  • SupportsCallback
  • Indication of whether the modem supports call-back

  • SupportsSynchronousConnect
  • Boolean indicating that synchronous, as well as asynchronous, communication is supported.

  • SystemCreationClassName
  • The scoping System's CreationClassName.

  • SystemName
  • The scoping System's Name.

  • Terminator
  • The Terminator property contains the string that marks the end of a command string.
    Example:

  • TimeOfLastReset
  • The TimeOfLastReset property indicates the date and time this controller was last reset. This could mean the controller was powered down, or reinitialized.

  • Tone
  • The Tone property contains the command string that instructs the modem to use tone mode for dialing. The phone line must support tone dialing.
    Example: T.

  • VoiceSwitchFeature
  • The VoiceSwitchFeature property contains the command strings used to activate the voice capabilities of a voice modem.
    Example: AT+V.


    Methods

  • SetPowerState
  • SetPowerState defines the desired power state for a logical device and when a device should be put into that state. The desired power state is specified by setting the PowerState parameter to one of the following integer values: 1="Full Power", 2="Power Save - Low Power Mode", 3="Power Save - Standby", 4="Power Save - Other", 5="Power Cycle" or 6="Power Off". The Time parameter (for all state changes, except 5, "Power Cycle") indicates when the power state should be set, either as a regular date-time value or as an interval value (where the interval begins when the method invocation is received). When the PowerState parameter is equal to 5, "Power Cycle", the Time parameter indicates when the device should power on again. Power off is immediate. SetPowerState should return 0 if successful, 1 if the specified PowerState and Time request is not supported, and some other value if any other error occurred. In a subclass, the set of possible return codes could be specified, using a ValueMap qualifier on the method. The strings to which the ValueMap contents are 'translated' may also be specified in the subclass as a Values array qualifier.

  • Reset
  • Requests a reset of the logical device. The return value should be 0 if the request was successfully executed, 1 if the request is not supported and some other value if an error occurred.


    Example WQL

    SELECT * FROM Win32_POTSModem
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