LINEDISCONNECTMODE_ Constants
The LINEDISCONNECTMODE_ bit-flag constants describe different reasons for a
remote disconnect request. A disconnect mode is available as call status to the
application after the call state transitions to
disconnected.
LINEDISCONNECTMODE_NORMAL
This is a normal disconnect request by the remote party. The call was
terminated normally.
LINEDISCONNECTMODE_UNKNOWN
The reason for the disconnect request is unknown but may become known later.
LINEDISCONNECTMODE_REJECT
The remote user has rejected the call.
LINEDISCONNECTMODE_PICKUP
The call was picked up from elsewhere.
LINEDISCONNECTMODE_FORWARDED
The call was forwarded by the switch.
LINEDISCONNECTMODE_BUSY
The remote user's station is busy.
LINEDISCONNECTMODE_NOANSWER
The remote user's station does not answer.
LINEDISCONNECTMODE_BADADDRESS
The destination address is invalid.
LINEDISCONNECTMODE_UNREACHABLE
The remote user could not be reached.
LINEDISCONNECTMODE_CONGESTION
The network is congested.
LINEDISCONNECTMODE_INCOMPATIBLE
The remote user's station equipment is incompatible with the type of call
requested.
LINEDISCONNECTMODE_UNAVAIL
The reason for the disconnect is unavailable and will not become known later.
LINEDISCONNECTMODE_NODIALTONE
A dial tone was not detected within a service-provider defined timeout, at a
point during dialing when one was expected (such as at a "W" in the dialable
string). This can also occur without a service-provider-defined timeout period or
without a value specified in the
dwWaitForDialTone member of the
LINEDIALPARAMS structure.
LINEDISCONNECTMODE_NUMBERCHANGED
The call could not be connected because the destination number has been
changed, but automatic redirection to the new number is not provided.
LINEDISCONNECTMODE_OUTOFORDER
The call could not be connected or was disconnected because the destination
device is out of order (hardware failure).
LINEDISCONNECTMODE_TEMPFAILURE
The call could not be connected or was disconnected because of a temporary
failure in the network; the call can be reattempted later and will eventually
complete.
LINEDISCONNECTMODE_QOSUNAVAIL
The call could not be connected or was disconnected because the minimum
quality of service could not be obtained or sustained. This differs from
LINEDISCONNECTMODE_INCOMPATIBLE in that the lack of resources may be a temporary condition
at the destination.
LINEDISCONNECTMODE_BLOCKED
The call could not be connected because calls from the origination address are
not being accepted at the destination address. This differs from
LINEDISCONNECTMODE_REJECT in that blocking is implemented in the network (a passive reject)
while a rejection is implemented in the destination equipment (an active
reject). The blocking may be due to a specific exclusion of the origination address,
or because the destination accepts calls from only a selected set of
origination address (closed user group).
LINEDISCONNECTMODE_DONOTDISTURB
The call could not be connected because the destination has invoked the Do Not
Disturb feature.
The high-order 16 bits can be assigned for device-specific extensions. The
low-order 16 bits are reserved.
A remote disconnect request for a given call results in the call state
transitioning to the
disconnected state and a
LINE_CALLSTATE message is sent to the application. The LINEDISCONNECTMODE_ information
provides details about the remote disconnect request. It is available in the call's
LINECALLSTATUS structure when the call is in the
disconnected state. While a call is in this state, the application is still allowed to
query the call's information and status. For example, user-to-user information
that is received as part of the remote disconnect is available then. The
application can clear a
disconnected call by dropping the call.
For backward compatibility, it is the responsibility of the service provider
to examine the negotiated API version on the line, and to not use this
LINEDISCONNECTMODE_ value if it is not supported on the negotiated version
(LINEDISCONNECTMODE_NORMAL or _UNKNOWN could be used instead).
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