[Asterisk-Users] Answer()

[Peter Svensson]

On Fri, 8 Oct 2004, Robert Jackson wrote:

> > What side effects can occur if I do not use it?
> > 
> Answer() is pretty important for use with anything that tries 
> to read DTMF or anything else from the channel.  In those 
> scenarios it is quite likely that you will not get any error, 
> but simply won't receive the data.  This is a huge problem for 
> any sort of IVR(auto-attendant;astcc;AGI;etc...).  You may not 
> need it in all situations, but you definitely will want to 
> answer any calls that don't simply ring another channel just 
> to be on the safe side.

On the isdn network (and the pstn) the audio path from the a subscriber to 
the b subscribe is only available once the b subscriber has answered the 
call. The reverse audio path may be opened earlier to allow inband call 
progress information to the caller.

Peter