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lineSetMediaMode
The lineSetMediaMode function sets the media mode(s) of the specified call in its LINECALLINFO structure.
LONG lineSetMediaMode(
HCALL hCall,
|
| DWORD dwMediaModes
|
| );
|
|
Parameters
hCall
A handle to the call whose media mode is to be changed. The application must
be an owner of the call. The call state of hCall can be any state.
dwMediaModes
The new media mode(s) for the call. As long as the UNKNOWN media mode flag is
set, other media mode flags may be set as well. This is used to identify a
call's media mode as not fully determined, but narrowed down to one of a small set
of specified media modes. If the UNKNOWN flag is not set, only a single media
mode can be specified. This parameter uses the following LINEMEDIAMODE_
constants:
LINEMEDIAMODE_UNKNOWN
The target application is the one that handles calls of unknown media mode
(unclassified calls).
LINEMEDIAMODE_INTERACTIVEVOICE
The target application is the one that handles calls with the interactive
voice media mode (live conversations).
LINEMEDIAMODE_AUTOMATEDVOICE
Voice energy is present on the call, and the voice is locally handled by an
automated application.
LINEMEDIAMODE_DATAMODEM
The target application is the one that handles calls with the data modem media
mode.
LINEMEDIAMODE_G3FAX
The target application is the one that handles calls with the group 3 fax
media mode.
LINEMEDIAMODE_TDD
The target application is the one that handles calls with the TDD (Telephony
Devices for the Deaf) media mode.
LINEMEDIAMODE_G4FAX
The target application is the one that handles calls with the group 4 fax
media mode.
LINEMEDIAMODE_DIGITALDATA
The target application is the one that handles calls that are digital data
calls.
LINEMEDIAMODE_TELETEX
The target application is the one that handles calls with the teletex media
mode.
LINEMEDIAMODE_VIDEOTEX
The target application is the one that handles calls with the videotex media
mode.
LINEMEDIAMODE_TELEX
The target application is the one that handles calls with the telex media
mode.
LINEMEDIAMODE_MIXED
The target application is the one that handles calls with the ISDN mixed media
mode.
LINEMEDIAMODE_ADSI
The target application is the one that handles calls with the ADSI (Analog
Display Services Interface) media mode.
LINEMEDIAMODE_VOICEVIEW
The media mode of the call is VoiceView.
Return Values
Returns zero if the request is successful or a negative error number if an
error has occurred. Possible return values are:
LINEERR_INVALCALLHANDLE, LINEERR_OPERATIONFAILED, LINEERR_INVALMEDIAMODE,
LINEERR_RESOURCEUNAVAIL, LINEERR_NOMEM, LINEERR_UNINITIALIZED,
LINEERR_OPERATIONUNAVAIL.
Remarks
The lineSetMediaMode function changes the call's media mode in its LINECALLINFO structure. Typical usage of this operation is either to set a call's media
mode to a specific known media mode or to exclude possible media modes as long as
the call's media mode is officially unknown (the UNKNOWN media mode flag is
set).
See Also
LINECALLINFO
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