Dialogic 6.2 Manual De Usuario

Making Call Transfers Using QSIG

November 2009

185

Call Diversion

Call Diversion (Unconditional, Busy and Not Responding) contains 

three scenarios:

„

Originating - the board places a call and the far end attempts to 

divert the call to a different destination. You can set Originating 

to enable or disable through the call configuration file using 

enable_call_diversion 

flag.

„

Served - the board receives an incoming call and attempts to 

divert it. This service requires new Bfv API calls to initiate and 

wait for the diversion to complete. However, it is possible for a 

call to fail to divert. You use 

BfvCallDivert, 

BFfvCallWaitForDivert,

 and 

.

 

Once the call 

is diverted, it is terminated. The application uses 

 after a successful call diversion to make 

sure that the call has been released completely.

„

Diverted To - the board receives an incoming call that is diverted 

by another party. This service uses 

 

and 

 that is returned by the 

 or 

 which notifies 

the Bfv application that the incoming call is being diverted from 

another party. As a result, the phone number of the device that 

diverts the call and the reason for the diversion is provided. The 

Bfv application has the option to refuse the diverted call through 

 followed by 

.

You must set the QSIG control parameter, 

disable_alerting 

to On in order for the call to be rejected and retained by the 

party attempting to divert the call. If this parameter is not set 

to On, then the incoming call is terminated.

You can manually send an alerting message through 

 and is used when alerting is disabled in 

the call control configuration file and when the application wants 

to send an alerting message to the remote end rather than answer 

the call.

Call Transfer

QSIG supports two B-channel transfer. Both channels must support 

the TBCT capability. This is accomplished through the 

BfvLineTransferCapabilityQuery. 

However you must connect 

the 2-B channels so that both parties can communicate while the 

transfer occurs. The application then uses 

BfvCallSwitchConnect 

function to connect both B-channels. For further details, see  

Volume 2, Bfv-Level Call Control and Call Switching, Bfv Reference