This is a set of bit flags that indicate the media modes that will be
used when the TAPI line device is activated by setting the ThbTapiLine.Active
property to True. This value is used to register the application as a
potential target for incoming calls of the specified media modes.
The MediaModes property is meaningfull only if the ThbTapiLine.Privileges.Owner
property is set to True.
When ThbTapiLine.DeviceID/DeviceName
property is modified, the ThbTapiLine.Caps.MediaModes
property is set to the value of all media modes the line device supports.
This value can be used to check the capabilities of the line device. If
the ThbTapiLine.MediaModes is equal to zero when ThbTapiLine.Active is set
to True, the line device will be opened using all mdeia modes it supports.
If MediaModes is not equal to zero, the device will be opened using the
media modes defined in this property.
If your application requires fewer media modes than the default, you
are able to change the value of this property prior to setting ThbTapiLine.Active
to True, otherwise you should set MediaMode to zero.
The LINEMEDIAMODE_ constants describe media types (or modes) of a communications
session or call. Possible media modes are:
Constant
Description
LINEMEDIAMODE_AUTOMATEDVOICE
Voice energy was detected on the call, and the voice is locally handled
by an automated application such as with an answering machine application.
When a service provider cannot distinguish between interactive and automated
voice on an incoming call, it will report the call as interactive voice.
LINEMEDIAMODE_DATAMODEM
A data modem session on the call.
LINEMEDIAMODE_ADSI
An ADSI (Analog Display Services Interface) session on the call. ADSI
enhances voice calls with alphanumeric information downloaded to the phone
and the use of soft buttons on the phone.
LINEMEDIAMODE_DIGITALDATA
A digital data stream of unspecified format.
LINEMEDIAMODE_G3FAX
A group 3 fax is being sent or received over the call.
LINEMEDIAMODE_G4FAX
A group 4 fax is being sent or received over the call.
LINEMEDIAMODE_INTERACTIVEVOICE
Voice energy was detected on the call, and the call is handled as an
interactive voice call with humans on both ends.
LINEMEDIAMODE_MIXED
A mixed session on the call. Mixed is one of the ISDN telematic services.
LINEMEDIAMODE_TDD
A TDD (Telephony Devices for the Deaf) session on the call.
LINEMEDIAMODE_TELETEX
A teletex session on the call. Teletex is one of the telematic services.
LINEMEDIAMODE_TELEX
A telex session on the call. Telex is one of the telematic services.
LINEMEDIAMODE_VIDEO
The media type of the call is video. (TAPI versions 2.1 and later)
LINEMEDIAMODE_VIDEOTEX
A videotex session on the call. Videotex is one the telematic services.
LINEMEDIAMODE_VOICEVIEW
The media type of the call is VoiceView. (TAPI versions 1.4 and later)
LINEMEDIAMODE_UNKNOWN
A media stream exists but its mode is not currently known and may become
known later. This would correspond to a call with an unclassified media
type. In typical analog telephony environments, an incoming call's media
type may be unknown until after the call has been answered and the media
stream has been filtered to make a determination.
If the unknown media-mode flag is set, other media flags can also be set.
This is used to signify that the media is unknown but that it is likely
to be one of the other selected media types.
Availability
Design-Time: Read, Write / Run-Time: Read, Write
Declaration
property MediaModes: DWord;
Remarks
Some devices not allow to use all supported media mode at the same time,
so that you have to restrict them to the one you need. To be aware of
the active media modes while the device is active, see the property ThbTapiLine.Status.OpenMediaModes.