[Serusers] Routing unknown users to PSTN

[Andreas Granig]

Hi,

I'd like to use official phone numbers inside my voip network (the 
numbers are assigned to me and are routed to my Cisco-5300 gateway in 
case of an incoming call from PSTN), and I don't want to use a prefix 
when calling from voip to PSTN.

Now when I want to perform a call from the voip net, how can I decide 
wether it's an internal voip call or should be routed to the PSTN gateway?

Would it be a proper solution to just lookup in the aliases- and 
location-table, and, if not found there, just forward it to the PSTN 
gateway? The PSTN gateway should then route it back to my SER if it's a 
number assigned to me, and I'd get a loop, which should be detected by 
the mf_process_maxfwd_header() function.

Sounds like a ugly hack, and I'm really not shure if this would work, so 
how would be the standard solution for such a task? (beside using a PSTN 
prefix)

Regards,
Andy