[asterisk-users] over running my did's

[Timothy C Litwiller]

I have a did with 20 channels from didforsale. that we use to let local 
members call to listen to a conference several times a week without long 
distance charges.

The upcoming call is getting more interest than usual and from places 
that are not local so we want to use a free conference service in 
addition to the local conference.

How can I setup a conference on my asterisk box for the people that 
normally call in there and also call an outside number for those that 
are above and beyond the 20 lines channels I can provide and the are 
long distance anyways so a number here or a number in iowa doesn't make 
them any difference.

is there a way that I could call the outside conference # and then 
transfer it to a local asterisk conference and then hang up can call the 
local asterisk conference back - and if I do that how do I hang up the 
long distance conference when it is done?

I seem to be missing some basic understanding here.