lineGetHSCSDState (Windows Embedded CE 6.0)

1/6/2010

Use the lineGetHSCSDState function to get the non-transparent High Speed Circuit Switched Data (HSCSD) configuration to be applied during the next data call.

Syntax

LONG WINAPI lineGetHSCSDState(
  HLINE hLine,
  LPDWORD lpdwChannelsIn,
  LPDWORD lpdwMaxChannelsIn,
  LPDWORD lpdwChannelCodings,
  LPDWORD lpdwAirInterfaceRate
);

Parameters

• hLine
  The line device handle. The line device handle must have been previously obtained by a call to lineOpen with the proper TAPI device ID specified and a device-specific extension version successfully negotiated with lineNegotiateExtVersion.

• lpdwChannelsIn
  Points to a DWORD indicating the initial number of downstream radio channels in the next call.

  Note

  The number of upstream channels is determined by the network.

• lpdwMaxChannelsIn
  Points to a DWORD indicating the maximum number of downstream radio channels that will be requested in the next call.

  Note

  The number of upstream channels is determined by the network.

• lpdwChannelCodings
  Points to a DWORD indicating the possible per-channel speeds at which the device can communicate with the network. See the Channel Rates constants for possible values.

• lpdwAirInterfaceRate
  Points to a DWORD indicating the speed at which the device should communicate with the base station. See the Air Interface Rates constants for possible values.

  Note

  Due to RLP error link correction, the request air interface rate should be higher than the desired land link rate between the landline IWF and the connection destination.

Return Value

Returns zero if the function completes successfully, or a negative error number if an error occurs. The following are possible return values:

• LINEERR_RESOURCEUNAVAIL
• LINEERR_INVALLINEHANDLE
• LINEERR_STRUCTURETOOSMALL
• LINEERR_INVALPOINTER
• LINEERR_UNINITIALIZED
• LINEERR_NOMEM
• LINEERR_OPERATIONUNAVAIL
• LINEERR_OPERATIONFAILED

Remarks

This function is synchronous. No LINE_REPLY message is sent. Not implemented for CDMA.

Requirements

See Also

Reference

Extended TAPI Functions
Channel Rates
Air Interface Rates