asterisk users - Oct 2008 - Generating 484 "Address Incomplete"

Hi,

We are processing lots of calls and I want to filter these that have 
incomplete numbers sent
with a proper SIP response. These numbers are not in the local dialplan 
by themselves, so
I'm trying to find a way to generate 484 "Address Incomplete" SIP 
response based on the
length of the extension called.

Congestion response is too lossy of the original cause and doesn't work 
in my case.

Any ideas?

> I'm trying to find a way to generate 484 "Address Incomplete"
SIP
> response based on the
> length of the extension called.
See the allowoverlap option in sip.conf.  It should cause a 484 to be  
sent if the address is potentially matchable, but not yet matching.