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Voice API for Windows Operating Systems Library Reference — November 2003 281
enable echo cancellation resource mode — dx_listenecr( )
!
!!
! Cautions
This function fails when:
• An invalid channel device handle is specified.
• An invalid TDM bus time-slot number is specified.
• The ECR feature is not enabled on the board specified.
• The ECR feature is not supported on the board specified.
!
!!
! Errors
If the function returns -1, use the Standard Runtime Library (SRL) Standard Attribute function
ATDV_LASTERR( ) to obtain the error code or use ATDV_ERRMSGP( ) to obtain a descriptive
error message. One of the following error codes may be returned:
EDX_BADPARM
Parameter error
EDX_SH_BADCMD
Function is not supported in current bus configuration
EDX_SH_BADEXTTS
TDM bus time slot is not supported at current clock rate
EDX_SH_BADINDX
Invalid Switch Handler index number
EDX_SH_BADLCLTS
Invalid channel number
EDX_SH_BADMODE
Function is not supported in current bus configuration
EDX_SH_CMDBLOCK
Blocking function is in progress
EDX_SH_LCLTSCNCT
Channel is already connected to TDM bus
EDX_SH_LIBBSY
Switch Handler library is busy
EDX_SH_LIBNOTINIT
Switch Handler library is uninitialized
EDX_SH_MISSING
Switch Handler is not present
EDX_SH_NOCLK
Switch Handler clock fallback failed
EDX_SYSTEM
Error from operating system; use dx_fileerrno( ) to obtain error value