has_dtmf

Description:

public bool has_dtmf ()

Whether or not this can send DTMF tones using send_tones_async.

To be able to send DTMF tones, at least one of this's contents must implement IFACE_CALL_CONTENT_INTERFACE_DTMF interface.

Parameters:

this

a CallChannel

Returns:

whether or not this can send DTMF tones.