This looks like the same problem I am having. As per Brian it is a NO ROUTE issue. Check your FS console and look for a "switch_core_standard_on_routing() No Route, Aborting" to confirm. Jair Santos -----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of hemant kumar Sent: Friday, July 11, 2008 3:32 PM To: freeswitch-users@lists.freeswitch.org Subject: [Freeswitch-users] INVITE no SDP Hi All, I have registered freeswitch to an external gateway as a softphone, and it has registered nicely. Now, i had given extension 1000 to freeswitch. When i try to call from external gateway to freeswitch, it always gives Temporarily Unavailable. However, if i register a phone with freeswitch i am able to dial that extension. Can someone please help me out in this ? Thanks, Hemant