Hi, I couldn't find any info on how to search the mailing list archives for the answer to my question, so I'll put it here. Hopefully someone can help me out. Does ser support URI rewriting? In my scenario we have a pstn gateway that will formulate a sip invite request uri with the phone number as the host portion e.g. sip:5551231234@192.168.0.2 where 192.168.0.2 is the address of the ser proxy What I need to be able to do is convert that 5551231234(a)192.168.0.2 to host@domain presumably using ENUM/DNS type services. Does ser support this? Does anyone know a free DNS server that supports ENUM? Thanks for the help. Cheers, Marc Marc Archer Aastra Technologies Ltd, 8 Federal Street, Billerica, MA 01821 Tel: +1 978-436-4251 Fax: +1 978-436-4233 Web: www.aastra.com