Dialogic 6.2 用户手册

Making Two-Channel Call Transfers (Tromboning)

November 2009

201

If the application configured the echo canceller in the channel to get 

an input reference signal from slot #1, then the application must 

remove this configuration to return the echo canceller to its default 

behavior. To do this the application must call the 

BfvSpeechEchoCancelControl() function (See Volume 3 of the 

Bfv API Reference Manual). For example:

BT_ZERO(speech_args);

speech_args.echoc_op = ECHOC_OP_ALT_INPUT_DISABLE;

BfvSpeechEchoCancelControl (lp, &speech_args);

Calling the BfvLineReset() function on a channel also returns the 

echo canceller to its default behavior.