LINEDEVSTATE_ Constants
The LINEDEVSTATE_ bit-flag constants describe various line status events.
LINEDEVSTATE_OTHER
Device-status items other than those listed below have changed. The
application should check the current device status to determine which items have changed.
LINEDEVSTATE_RINGING
The switch tells the line to alert the user. Service providers notify
applications on each ring cycle by sending
LINE_LINEDEVSTATE messages containing this constant. For example, in the United States, service
providers send a message with this constant every six seconds.
LINEDEVSTATE_CONNECTED
The line was previously disconnected and is now connected to TAPI.
LINEDEVSTATE_DISCONNECTED
This line was previously connected and is now disconnected from TAPI.
LINEDEVSTATE_MSGWAITON
The message waiting indicator is turned on.
LINEDEVSTATE_MSGWAITOFF
The message waiting indicator is turned off.
LINEDEVSTATE_INSERVICE
The line is connected to TAPI. This happens when TAPI is first activated or
when the line wire is physically plugged in and in-service at the switch while
TAPI is active.
LINEDEVSTATE_OUTOFSERVICE
The line is out of service at the switch or physically disconnected. TAPI
cannot be used to operate on the line device.
LINEDEVSTATE_MAINTENANCE
Maintenance is being performed on the line at the switch. TAPI cannot be used
to operate on the line device.
LINEDEVSTATE_OPEN
The line has been opened by another application.
LINEDEVSTATE_CLOSE
The line has been closed by another application.
LINEDEVSTATE_NUMCALLS
The number of calls on the line device has changed.
LINEDEVSTATE_NUMCOMPLETIONS
The number of outstanding call completions on the line device has changed.
LINEDEVSTATE_TERMINALS
The terminal settings have changed. This may happen, for example, if multiple
line devices share terminals among them (for example, two lines sharing a phone
terminal).
LINEDEVSTATE_ROAMMODE
The roam mode of the line device has changed.
LINEDEVSTATE_BATTERY
The battery level has changed significantly (cellular).
LINEDEVSTATE_SIGNAL
The signal level has changed significantly (cellular).
LINEDEVSTATE_DEVSPECIFIC
The line's device-specific information has changed.
LINEDEVSTATE_REINIT
Items have changed in the configuration of line devices. To become aware of
these changes (as for the appearance of new line devices) the application should
reinitialize its use of TAPI.
LINEDEVSTATE_LOCK
The locked status of the line device has changed. (For more information, see
LINEDEVSTATUSFLAGS_LOCKED in the following topic, LINEDEVSTATUSFLAGS_
Constants.)
LINEDEVSTATE_CAPSCHANGE
Indicates that, due to configuration changes made by the user or other
circumstances, one or more of the fields in the
LINEDEVCAPS structure for the address have changed. The application should use
lineGetDevCaps to read the updated structure. If a service provider sends a
LINE_LINEDEVSTATE message containing this value to TAPI, TAPI will pass it along to
applications that have negotiated TAPI version 0x00010004 or above; applications
negotiating a previous API version will receive LINE_LINEDEVSTATE messages specifying
LINEDEVSTATE_REINIT, requiring them to shutdown and reinitialize their connection
to TAPI to obtain the updated information.
LINEDEVSTATE_CONFIGCHANGE
Indicates that configuration changes have been made to one or more of the
media devices associated with the line device. The application, if it desires, may
use
lineGetDevConfig to read the updated information. If a service provider sends a
LINE_LINEDEVSTATE message containing this value to TAPI, TAPI will pass it along to
applications that have negotiated TAPI version 0x00010004 or above; applications
negotiating a previous API version will not receive any notification.
LINEDEVSTATE_TRANSLATECHANGE
Indicates that, due to configuration changes made by the user or other
circumstances, one or more of the fields in the
LINETRANSLATECAPS structure have changed. The application should use
lineGetTranslateCaps to read the updated structure. If a service provider sends a
LINE_LINEDEVSTATE message containing this value to TAPI, TAPI will pass it along to
applications that have negotiated TAPI version 0x00010004 or above; applications
negotiating a previous API version will receive LINE_LINEDEVSTATE messages specifying
LINEDEVSTATE_REINIT, requiring them to shutdown and reinitialize their connection
to TAPI to obtain the updated information.
LINEDEVSTATE_COMPLCANCEL
Indicates that the call completion identified by the completion ID contained
in the
dwParam2 parameter of the LINE_LINEDEVSTATE message has been externally canceled and
is no longer considered valid (if that value were to be passed in a subsequent
call to
lineUncompleteCall, the function would fail with LINEERR_INVALCOMPLETIONID). If a service
provider sends a
LINE_LINEDEVSTATE message containing this value to TAPI, TAPI will pass it along to
applications which have negotiated TAPI version 0x00010004 or above; applications
negotiating a previous API version will not receive any notification.
LINEDEVSTATE_REMOVED
Indicates that the device is being removed from the system by the service
provider (most likely through user action, through a control panel or similar
utility). A LINE_LINEDEVSTATE message with this value will normally be immediately
followed by a
LINE_CLOSE message on the device. Subsequent attempts to access the device prior to TAPI
being reinitialized will result in LINEERR_NODEVICE being returned to the
application. If a service provider sends a
LINE_LINEDEVSTATE message containing this value to TAPI, TAPI will pass it along to
applications that have negotiated TAPI version 0x00010004 or above; applications
negotiating a previous API version will not receive any notification.
No extensibility. All 32 bits are reserved.
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