Toshiba Strata CT, Инструкция по установке и обслуживанию

Страница: 295 / 385

Computer Telephony Integration
Strata CT I&M Manual October 2000
9-21
lineDial
This function dials the specified dialable number. Use this operation in all situations where
you need to send address information to the switch on an existing call; such as dialling the
address of the party to transfer a call etc.
lineAnswer
This function accepts the specified OFFERED call. The optional user-to-user information is
ignored.
lineDrop
This function drops or disconnects the specified call or abandons a call attempt in progress.
When this function returns, the call will be in the IDLE state. The optional user-to-user
information is ignored.
Because the DKT TSPI can drop calls only to which it is connected, this feature is allowed
for calls in the CONNECTED state only. In addition, the service provider keeps track of
whether a given call is owned by a TAPI application, in order to avoid dropping calls initiated
or answered by other applications. If the call is considered to be owned by a TAPI
application, it must be either initiated, answered or placed on hold by a TAPI application.
LineDeallocateCall
This function releases resources used to keep track of a given call. This function can only be
called while the state is idle.
Holding Calls
lineHold
This function places the specified call on hard hold. This can be used when in either
LINECALLSTATE_CONNECTED or LINE CALLSTATE_PROCEEDING states. The
application can place a call on hold even if it did not originate or answer that call.
lineUnhold
This function retrieves the specified held call. This feature is only valid when the call is in
the LINECALLSTATE_ONHOLD state.
Transferring Calls
TAPI provides two mechanisms for call transfer: blind transfer or consultation transfer.
◆
In blind transfer, an existing call is transferred to a specified destination address in
one phase using lineBlind transfer.
◆
In a consultation transfer, the existing call is first prepared for transfer to another
address using lineSetup Transfer. This places the existing call on consultation hold,
and identifies the call as the target for the next transfer-completion request. This
command also allocates a consultation call that can be used to establish the
consultation call with the party to which the call will be transferred.
H
C