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4/8/2010

Use the lineGetHSCSDCapsfunction 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.

Syntax 

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 lineOpenwith the proper TAPI device ID specified and a device-specific extension version successfully negotiated with lineNegotiateExtVersion.

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 Statesconstants 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.

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 device could communicate with the network. See the Channel Ratesconstants for possible values.

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

Header extapi.h
Library cellcore.lib
Windows Embedded CE Windows CE 3.0 and later
Windows Mobile Pocket PC 2002 and later, Smartphone 2002 and later

See Also