asterisk users - May 2009 - SIP _call_ to Asterisk box

Is it possible to make a call from a SIP/IAX softphone, say Zoiper, on 
one computer to an Asterisk system without having an extension/account? 
   If so what are the terms I need to search for to figure out how to do 
it?  So far "anonymous SIP" has got me the closest I think but no
brass
ring.


TIA,
Rod
--

I believe you can specify a default context:

sip.conf
[general]
context=mysipcontext

extensions.conf
[mysipcontext]
; be careful allowing calls that could incur toll charges here, especially 
if this box is exposed to the internet
exten => s,1,Answer()
;direct your call
exten => s,n,Hangup()


The version of zoiper I have running here (2.19, Library revision: 2875) 
works dialing "sip:<asterisk IP>",  or attempts to match an
extension in the
specified context "sip:/<extension>@<asterisk IP>"

It only gets the default context if it isn't already registered to
<asterisk
IP>
I don't know why zoiper wants one (and only one) forward slash in there.


----- Original Message ----- 
> Is it possible to make a call from a SIP/IAX softphone, say Zoiper, on
> one computer to an Asterisk system without having an extension/account?