Hi, I use Asterisk-1.2.26 (with Trixbox-2.1.12) and Portech MV-370 and my problem is that when I try to call an external mobile phone via Portech I have alway busy and in log file: Called Portech/348xxxxxxx -- Got SIP response 486 "Busy Here" back from 192.168.1.2-- SIP/Portech-086e5ee0 is busy == Everyone is busy/congested at this time (1:1/0/0) -- Executing Goto("SIP/200-08701488", "s-BUSY|1") in new stack. My configuration is: [1005] type=friend secret=1005 record_out=Adhoc record_in=Adhoc qualify=yes port=5060 nat=no mailbox=1005 at device host=dynamic dtmfmode=rfc2833 dial=SIP/1005 context=from-internal canreinvite=no callerid=device <1005> ..and sip trunk with in PEER details: type=peer host=192.168.1.2 context=from-trunk ..and in USER details: canreinvite=no context=from-trunk host=dynamic nat=yes qualify=yes secret=1005 type=friend username=1005 On Portech in "LAN To Mobile Table" I have: Item --> 0 URL --> * Call Num: # and in "Service Domain Settings" extension 1005 is registred and in Mobile Status the SIM instllation is ok. Thanks in advance. - Salvatore.