[asterisk-users] Beginner Questions part II

[John Koenig]

I should start with a thank you to the list for helping me getting up 
and running with Asterisk about a week ago.  I have been happily 
fiddling with Asterisk since then :).

I am working on adding a couple features to my dialplan.  My setup 
involves my asterisk box connecting to another third party sip 
provider.  I configured the extra trunk and there are no issues passing 
calls through their systems.  As it stands right now, I setup a calling 
rule that matches the pattern 9-XXX-XXX-XXXX, stripes off the 9, and 
then passes the call through to the third party.  I would like to just 
dial XXX-XXX-XXXX without having to dial the extra 9.  Is there a way 
that I can configure asterisk so that I check to see if the extension 
exists on my box first, if it does then pickup and if it doesn't then 
forward the call onto the third party?  If so, how?

The other feature I am looking to add is *67 caller id blocking.  Am I 
right in thinking that I first would configure an incoming call rule 
that matches to *67-<whatever> and then pass unknown as the caller id 
from there?

Any help is greatly appreciated.  Even if it is just pointing me in the 
right direction in regards to reading material.

Thanks,

John