I have the following connected to my FS box. A GrandStream phone, two POTS phones via the Linksys SPA2002, a soft phone installed on another system, not the FS machine and another POTS connected via an A200 port. If I call the GrandStream from one of the POTS on the SPA2002, it rings for ~30 seconds and I get a fast busy. If I call on the A200 connected phone, it rings and then nothing. It just stops ringing. If I call on the soft phone after it stops ringing I see a 404 error displayed on the phone "console". The log shows: 2010-08-26 06:30:59.364714 [DEBUG] mod_sofia.c:453 Channel sofia/internal/1000@192.168.2.51 hanging up, cause: NO_ROUTE_DESTINATION 2010-08-26 06:30:59.384660 [DEBUG] mod_sofia.c:515 Responding to INVITE with: 404 2010-08-26 06:30:59.384660 [DEBUG] switch_core_state_machine.c:46 sofia/internal/1000@192.168.2.51 Standard HANGUP, cause: NO_ROUTE_DESTINATION If I do a diff of directory/default/1001.xml and 1002.xml the only differences are the numbers and passwords. Any idea what I might want to try next? Thanks, Jim.