I have 1 IP phone (Swissvoice IP10S) and 1 POTS phone. When I dial the number for the IP phone off the POTS phone, the IP phone rings. But when I pick up the handset on the IP phone, I get a busy signal and this message on *: Aug 23 09:38:57 NOTICE[1142106560]: chan_mgcp.c:2243 handle_response: Terminating on result 502 from svip10@00059002042b-1 Here is the entire session. svip10 is the 1 and only line on the swissvoice phone. -- Executing Dial("SIP/64.72.107.2-0811d658", "MGCP/svip10@00059002042b") in new stack -- MGCP mgcp_request(svip10@00059002042b) -- MGCP cw: -1, dnd: 0, so: 0, sno: 0 -- MGCP mgcp_new(MGCP/svip10@00059002042b-1) created in state: Down -- Called svip10@00059002042b -- MGCP/svip10@00059002042b-1 is ringing -- Endpoint 'svip10@00059002042b-1' observed 'hd' -- MGCP/svip10@00059002042b-1 answered SIP/64.72.107.2-0811d658 -- Attempting native bridge of SIP/64.72.107.2-0811d658 and MGCP/svip10@00059002042b-1 Aug 23 09:38:57 NOTICE[1142106560]: chan_mgcp.c:2243 handle_response: Terminating on result 502 from svip10@00059002042b-1 == Spawn extension (exten, 2815699913, 1) exited non-zero on 'SIP/64.72.107.2-0811d658' -- Endpoint 'svip10@00059002042b-1' observed 'hu' -- MGCP handle_request(svip10@00059002042b-1) ast_channel already destroyed -- MGCP handle_request(svip10@00059002042b) set vmwi(-) mgcp.conf ------------ [00059002042b] context=matthew host=dynamic callerid = "John Doe" <123> callgroup=0 pickupgroup=0 nat=yes threewaycalling=yes transfer=yes ; transfer requires threewaycalling=yes. Use FLASH to transfer callwaiting=yes ; this might be a cause of trouble for ip10s cancallforward=yes line => svip10 extensions.conf ---------------- [general] exten => 1115551212,1,Dial(MGCP/svip10@00059002042b) (1115551212 is not the real #; replaced for privacy) [matthew] exten => 4,1,Dial(MGCP/svip10@00059002042b) Any ideas on this? Thanks, Matthew