[Asterisk-Users] SIP Question about asterisk

[Bill Jordan]

I wanted to know if there was any way to setup an asterisk server as a 
PSTN gateway?

That is, I wanted the asterisk server to accept invites from any sip 
client and send them through its T1 or FXO cards.

So far I've only been able to make asterisk accept invites from users it 
knows about.  Is there any way to make it blindly accept all sip invites 
without any authentication?

Bill