I created an alias at Sipbroker.com that forwards calls to my URI (email@example.com) I created a SIP trunk called sipbroker type=peer fromuser=myCallcentricID fromdomain=callcentric.com host=sipbroker.com port=5060 incominglimit=3 insecure=invite nat=yes canreinvite=no In sip_custom.conf I put this: [sipbroker] host=sipbroker.com type=peer context=sipbroker-in insecure=very In extensions_custom.conf I put this: [sipbroker-in] exten => _X.,Dial(204) exten => _X.,Dial(205) 204 and 205 are the extensions in my PBX. When someone calls from PSTN to a sipbroker access number and dials my alias, the call should ring at my extension (204). Instead, the caller receives busy tone, and I see this in the Asterisk Log: [2010-09-05 20:17:32] NOTICE chan_sip.c: Call from 'sipbroker' to extension '204' rejected because extension not found in context 'sipbroker-in'. Is it something wrong in the sipbroker-in context at extensions_custom.conf? It used to work, and one day it stopped working! Odd... I have Elastix 2.0 Thanks!