UNIMODEM_INFO

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Windows Embedded CE 6.0 R3

4/8/2010

This structure receives the device-specific data for a Unimodem during a call to the lineGetDevCaps function.

Syntax

typedef struct UNIMODEM_INFO_tag {
  WORD wDeviceType; 
  WORD wActive; 
  DWORD dwPPPMTU; 
} UNIMODEM_INFO, * PUNIMODEM_INFO; 

Members

• wDeviceType
  Value that indicates the type of device on the port. The following table shows possible values for dwOption.

  Value	Description
  DT_NULL_MODEM	No modem
  DT_EXTERNAL_MODEM	An external modem
  DT_INTERNAL_MODEM	An internal modem
  DT_PCMCIA_MODEM	A PCMCIA modem
  DT_PARALLEL_PORT	A parallel port
  DT_PARALLEL_MODEM	A parallel modem
  DT_IRCOMM_MODEM	An IrCOMM modem

• wActive
  If the port is currently active, this field is 1. Otherwise, this field is 0.

• dwPPPMTU
  Maximum transfer unit size, in bytes, that PPP will use. The default value is 1500.

Remarks

Normally, wActive will be 1 for all TAPI devices except PC Cards that have been removed from the system.

To improve efficiency on some media, choose a size smaller than the default for dwPPPMTU.

Requirements

See Also

Reference

lineGetDevCaps
UNIMDM_CHG_DEVCFG