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November 2009 176
5 - Transferring Calls
This chapter describes transferring calls using the Bfv API-level and
BSMI-level call control functionality.
Note: The Dialogic® Brooktrout® SR140 Fax Software does not
support this functionality.
Call transfer is a method of redirecting an incoming call to an
internal line or “transferring” it from one channel to another
channel. The phone network can also manage and disconnect the
call. Call transfer functionality is supported on the board and inside
a public switch. Depending on the protocol in your network,
transfers use either the same channel for transfers, such as an
analog line, or use two B-channels for transfers, such as explicit call
transfer in Europe.
This chapter has the following sections:
Making Call Transfers Using Bfv
Making Hookflash Transfers
Making Two B-Channel Transfers
Making Call Transfers Using QSIG
Making Call Transfers Using Active Redirection (Japan)
Making Explicit Call Transfers (ECT) With E1 ISDN and
BRI
Making Two-Channel Call Transfers (Tromboning)
Transferring Calls Using Release Link Trunk Transfer
Placing Calls on Hold Using BSMI