Station Status Control
There are three major station status functions that need control: message
waiting lights, forwarding, and do not disturb. Forwarding and Do Not Disturb are
controllable through the existing
lineForward function (which is address-specific), and queried using
lineGetAddressStatus. The LINEDEVSTATUSFLAGS_MSGWAIT bit in the
dwDevStatusFlags member of
LINEDEVSTATUS indicates the status of the message waiting light on the device, and a
LINEDEVSTATE_MSGWAITON or LINEDEVSTATE_MSGWAITOFF message is sent to indicate when
the state changes. The
lineSetLineDevStatus function allows the message waiting light to be controlled without having to
implement a TAPI phone device just for that purpose. The
LINEFEATURE_SETDEVSTATUS bit (in the
dwLineFeatures member of
LINEDEVCAPS and
LINEDEVSTATUS) indicates when it can be called, and the
dwSettableDevStatus member of
LINEDEVCAPS allows the application to detect which of the device status settings can be
controlled from the application. In addition to allowing the message waiting
feature to be controlled, it also allows the device's Connected, Inservice, and
Locked status to be set, to the extent that these are supported by the switch or
other hardware. Calls to this function result in appropriate
LINE_LINEDEVSTATE messages being sent to reflect the new status.
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