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Managing Calls Using IP Telephony
November 2009 217
Outgoing IP Calls
Your application manages outgoing calls if it performs the following:
Uses the function calls from the table below
Does not do syntax validation of the dial string
Relies on the return status from the BfvLineOriginateCall
function to determine call completion success.
In this case the application is unaware of the mode of transport
(PSTN or IP):
See Sample INVITE Request on page 222 for more information about
using Bfv function calls.
BfvCallDisconnect Starts the process of terminating a telephone call.
BfvCallSetup Starts the process of dialing an outgoing
telephone call.
BfvCallStatus Retrieves the channel’s current call state.
BfvLineDialString Places the line in an OFF_HOOK state, dials the
digits specified, and returns after dialing the last
digit.
BfvLineOrigCallDB Checks the specified dialing database for the
specified telephone number, returns the amount
of time to wait before dialing, and then places the
call on an outgoing line and updates the dialing
database.
BfvLineOriginateCall Dials an outgoing call (equivalent to the
BfvCallSetup and BfvCallWaitForComplete lower
level function calls.)
BfvLineTerminateCall Terminates the current call (equivalent to the
BfvCallDisconnect and BfvCallWaitForRelease
lower level function calls.)
BfvLineTransfer
CapabilityQuery
Indicates the transfer capability of a channel.
Also provides an application with information to
determine whether two particular lines are paired
to perform a two B-channel call transfer.
BfvWaitForComplete Waits for the outgoing telephone call to finish.
BfvWaitForRelease Waits for the termination of a telephone call to
finish.