[Serusers] multiple domains and pstn

Hi, I have a few questions about multiple domains and call from/to pstn. I don't want to change the ser.cfg script everytime a new domain is added. How can I support the following features? 1. Every domain has their own 3 or 4 digit dial plan. When they call PSTN, their caller id should be the either a prefix plus their internal number or a generic receptionist number, but not the 3/4 digit internal number. Different domains have different prefix. Is there a way to do this without changing the script for every domain? 2. Should interdomain calls be prohibited? Is it preferred to send the call to PSTN and hairpin back? I know it consumes more resources but would it provide better privacy? If that's the case, how to prevent interdomain calls, i.e. how to verify from and to URI have the same host parts? 3. When PSTN calls come in, should I use prefix2domain in pdt module to convert the PSTN number to a local domain number? Any pitfalls? This list has been great! Thanks for all your help. Best Regards, Richard __________________________________ Do you Yahoo!? Win a $20,000 Career Makeover at Yahoo! HotJobs http://hotjobs.sweepstakes.yahoo.com/careermakeover