Hello, I am new user of Asterisk. Yesterday I was trying to call from softphone to Asterisk, and that Asterisk routes this call to sipphone.com provider. I have found information on internet about how to register to sipphone and it seems that I have done. "sip show status" (or similar command) in CLI was showing me that I was registered. To call was not working, and on Asterisk's logs appeared: ------ == Parsing '/etc/asterisk/enum.conf': Found Asterisk Ready. -- Registered SIP '200' at 192.168.1.121 port 5060 expires 900 -- Saved useragent "Linphone-1.2.0/eXosip" for peer 200 -- Got SIP response 481 "Subcription Does Not Exist" back from 192.168.1.121 -- Executing SetCallerID("SIP/200-0e5a", ""Name" 17476304480") in new stack -- Executing Dial("SIP/200-0e5a", "SIP/1747blabla@proxy01.sipphone.com|20|r") in new stack -- Called 1747blabla@proxy01.sipphone.com -- Got SIP response 500 "I'm terribly sorry, server error occured (1/SL)" back from 198.65.166.131 -- SIP/proxy01.sipphone.com-8a47 is circuit-busy == Everyone is busy/congested at this time (1:0/1/0) == Auto fallthrough, channel 'SIP/200-0e5a' status is 'CONGESTION' ------ Calling using linphone or other softphones was working, so it is not "circuit-busy" error. I tried lot of configurations (in sip.conf and extensions.conf). Call is getting the correct route, but connection it is not working. Asterisk is behind NAT, without any redirected port. I was using externip and nat directives in configuration file. I think that I shouldn't need redirected ports because I was trying to call, not to receive calls. And NAT problem should be that I can listen but not talk (or vice-versa...) Any idea about what I can check? Any suggestion? Tahnk you very much, -- Carles Pina i Estany GPG id: 0x8CBDAE64 http://pinux.info Manresa - Barcelona