Requirement to call mobile and pstn line from my asterisk

I had my asterisk server running internally testing. Wondering what is the requirement to make outbound call if my server don’t have analog or digital pstn card? Can Dundi work on this using internet line to make outbound call?

please advice and thank you.

To call through Internet you can use SIP or IAX protocols, if you want to call pstn numbers through one of this protocols you need to sign a contract with an itsp, no special hardware required, just an internet connection.

Cheers.

Marco Bruni
www.marcobruni.net