Dialogic 6.2 Manuale Utente

Making Call Transfers Using Bfv

November 2009

177

 illustrates a transfer using the 

BfvLineTransfer high level call transfer function.

The application issues a BfvLineTransfer function call to transfer 

a call. BfvLineTransferCapabilityQuery checks the transfer 

capability through LINE_XFER_ queries. If the line is capable of the 

transfer type requested (such as transferring using two B-channels, 
LINE_XFER_TWO_CHAN

), then the call is placed on hold with 

BfvCallHold while the other line is checked for availability with 

BfvCallSetup. The call is transferred and supervised until either 

party ends the call. BfvLineTransferComplete notifies the 

application that the lines are connected.

If all conditions follow true, the application successfully transfers the 

call. If a statement runs into a false condition, only the enquiry call 

ends.

For more information on the messages, please refer to Volume 2 of 

the Bfv API Reference Manual for specific messages.