I want a caller to be able to phone into asterisk from a mobile phone or a pay phone and then enter a special PIN and allow them to dial another number.
This could allow for significant savings on long distance calls.
Is there a build in module or functionality for doing this?
Thanks
Yes, this is called DISA and is built into Asterisk. Here is a walkthrough. If you have FreePBX, you can do this through the GUI...look on the left side under "Internal Options and Configurations."