On the wiki, an example of a port audio configuration is given that involves creating a Sip gateway on localhost. As I couldn't get this to work (apparently due to the external profile's detection of NAT), I thought I would try an alternative approach. I am modifying the default dial plan here. At some point I'll probably just rewrite it anyway. I have created a user in the directory for extension 1020. For outbound calls, in default.xml, I have the following: <extension name="portaudio" continue="true"> <condition field="source" expression="mod_portaudio"> <action application="set_user" data="1020@$${domain}"/> <action application="set" data="effective_caller_id_number=1020"/> </condition> </extension> The log shows that the set_user is executed, as is the set effective_caller_id_number (the latter shouldn't be necessary, unless I'm misunderstanding). However, running show channels after making a call from the portaudio device still shows the user name and caller id as FreeSWITCH,0000000000 Also, when I try to call a local extension from the audio device, I get the following in the logs, and the call is terminated. I've checked the code, and clearly the failure to open the file is the cause of the termination. The Sip phone on the extension rings once and then it receives the cancellation from FreeSWITCH. 2008-12-25 10:29:59 [DEBUG] switch_ivr_originate.c:1313 switch_ivr_originate() P lay Ringback File [local_stream://moh] 2008-12-25 10:29:59 [ERR] mod_local_stream.c:308 local_stream_file_open() Unknow n source moh 2008-12-25 10:29:59 [ERR] switch_ivr_originate.c:1322 switch_ivr_originate() Err or Playing File 2008-12-25 10:29:59 [DEBUG] switch_core_codec.c:122 switch_core_session_set_read _codec() Restore original codec. 2008-12-25 10:29:59 [NOTICE] switch_ivr_originate.c:1560 switch_ivr_originate() Hangup sofia/internal/sip:1000@192.168.0.4:2048;line=mxyv04us [CS_CONSUME_MEDIA] [NO_ANSWER] 2008-12-25 10:29:59 [DEBUG] switch_channel.c:1494 switch_channel_perform_hangup( ) Send signal sofia/internal/sip:1000@192.168.0.4:2048;line=mxyv04us [KILL] Any hints would be welcome. There is no urgency, of course, as I'm doing this for fun and out of interest. Happy holidays to all on the FreeSWITCH list.