Hi guys, I setup an IPPBX and some IP Phones to register to it. IPPBX has 6 "register=> xxx@xxx.x.x.x.." sip accounts. When these sip accounts register timeout due to the WAN network problem all the extensions got logon failed. It seems IPPBX register to its own sip proxy server first. If it failed it cannot take the sip clients' request for registration. Anybody has solutions? Thank you so much. lanfei Discover Yahoo! Stay in touch with email, IM, photo sharing and more. Check it out! http://discover.yahoo.com/stayintouch.html