lineGetHSCSDCaps

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Use the lineGetHSCSDCaps function to get the High Speed Circuit Switched Data (HSCSD) device capabilities. The operator may or may not support HSCSD, so values obtained from calling this function do not necessarily reflect that an HSCSD connection is possible.

LONG WINAPI lineGetHSCSDCaps(
  HLINE hLine,
  LPDWORD lpdwClass,
  LPDWORD lpdwChannelsIn,
  LPDWORD lpdwChannelsOut,
  LPDWORD lpdwChannelsSum,
  LPDWORD lpdwChannelCodings
);

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. For more information about lineNegotiateExtVersion and lineOpen, see the TAPI Functions API Reference topics in the Windows CE SDK.

  • lpdwClass
    Points to a DWORD indicating the multi-slot class of the device. Refer to GSM specification 05.02 "Digital cellular telecommunications system (Phase 2+); Multiplexing and multiple access on the radio path" for possible values and meanings. See the Equipment States constants for possible values.

  • lpdwChannelsIn
    Points to a DWORD indicating the maximum number of downstream radio channels.

  • lpdwChannelsOut
    Points to a DWORD indicating the maximum number of upstream radio channels.

    Note   The number of upstream channels is determined by the network.

  • lpdwChannelsSum
    Points to a DWORD indicating the maximum number of upstream and downstream slots usable in a single timeframe.

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

Return Values

The lineGetHSCSDCaps function returns zero if the function completed successfully, and returns 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

Pocket PC Platforms: Pocket PC 2002 and later
OS Versions: Windows CE 3.0 and later
Header: extapi.h
Library: cellcore.lib

See Also

Channel Rates

Equipment States

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