Hi, with Freepbx 13 & ASterisk 13, when I call 666 -> fax system, I got a busy signal. Here are the logs
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
-- Executing [666@from-internal:1] Set("SIP/999-00000024", "FAX_RX_EMAIL=") in new stack
-- Executing [666@from-internal:2] Goto("SIP/999-00000024", "ext-fax,s,1") in new stack
-- Goto (ext-fax,s,1)
-- Executing [s@ext-fax:1] Macro("SIP/999-00000024", "user-callerid,") in new stack
-- Executing [s@macro-user-callerid:1] Set("SIP/999-00000024", "TOUCH_MONITOR=1499960409.36") in new stack
-- Executing [s@macro-user-callerid:2] Set("SIP/999-00000024", "AMPUSER=999") in new stack
-- Executing [s@macro-user-callerid:3] GotoIf("SIP/999-00000024", "0?report") in new stack
-- Executing [s@macro-user-callerid:4] ExecIf("SIP/999-00000024", "1?Set(REALCALLERIDNUM=999)") in new stack
-- Executing [s@macro-user-callerid:5] Set("SIP/999-00000024", "AMPUSER=999") in new stack
-- Executing [s@macro-user-callerid:6] GotoIf("SIP/999-00000024", "0?limit") in new stack
-- Executing [s@macro-user-callerid:7] Set("SIP/999-00000024", "AMPUSERCIDNAME=Ara Tech") in new stack
-- Executing [s@macro-user-callerid:8] GotoIf("SIP/999-00000024", "0?report") in new stack
-- Executing [s@macro-user-callerid:9] Set("SIP/999-00000024", "AMPUSERCID=999") in new stack
-- Executing [s@macro-user-callerid:10] Set("SIP/999-00000024", "__DIAL_OPTIONS=Ttr") in new stack
-- Executing [s@macro-user-callerid:11] Set("SIP/999-00000024", "CALLERID(all)="Ara Tech" <999>") in new stack
-- Executing [s@macro-user-callerid:12] GotoIf("SIP/999-00000024", "0?limit") in new stack
-- Executing [s@macro-user-callerid:13] ExecIf("SIP/999-00000024", "0?Set(GROUP(concurrency_limit)=999)") in new stack
-- Executing [s@macro-user-callerid:14] ExecIf("SIP/999-00000024", "0?Set(CHANNEL(language)=)") in new stack
-- Executing [s@macro-user-callerid:15] GotoIf("SIP/999-00000024", "0?continue") in new stack
-- Executing [s@macro-user-callerid:16] Set("SIP/999-00000024", "__TTL=64") in new stack
-- Executing [s@macro-user-callerid:17] GotoIf("SIP/999-00000024", "1?continue") in new stack
-- Goto (macro-user-callerid,s,28)
-- Executing [s@macro-user-callerid:28] Set("SIP/999-00000024", "CALLERID(number)=999") in new stack
-- Executing [s@macro-user-callerid:29] Set("SIP/999-00000024", "CALLERID(name)=Ara Tech") in new stack
-- Executing [s@macro-user-callerid:30] GotoIf("SIP/999-00000024", "0?cnum") in new stack
-- Executing [s@macro-user-callerid:31] Set("SIP/999-00000024", "CDR(cnam)=Ara Tech") in new stack
-- Executing [s@macro-user-callerid:32] Set("SIP/999-00000024", "CDR(cnum)=999") in new stack
-- Executing [s@macro-user-callerid:33] Set("SIP/999-00000024", "CHANNEL(language)=fr") in new stack
-- Executing [s@ext-fax:2] NoOp("SIP/999-00000024", "Receiving Fax for: , From: "Ara Tech" <999>") in new stack
-- Executing [s@ext-fax:3] StopPlayTones("SIP/999-00000024", "") in new stack
[2017-07-13 17:40:10] WARNING[7857][C-00000015]: pbx.c:2864 pbx_extension_helper: No application 'ReceiveFAX' for extension (ext-fax, s, 4)
== Spawn extension (ext-fax, s, 4) exited non-zero on 'SIP/999-00000024'
-- Executing [h@ext-fax:1] GotoIf("SIP/999-00000024", "1?failed") in new stack
-- Goto (ext-fax,h,104)
-- Executing [h@ext-fax:104] NoOp("SIP/999-00000024", "FAX for: , From: "Ara Tech" <999>") in new stack
-- Executing [h@ext-fax:105] Macro("SIP/999-00000024", "hangupcall,") in new stack
-- Executing [s@macro-hangupcall:1] GotoIf("SIP/999-00000024", "1?theend") in new stack
-- Goto (macro-hangupcall,s,3)
-- Executing [s@macro-hangupcall:3] ExecIf("SIP/999-00000024", "0?Set(CDR(recordingfile)=)") in new stack
-- Executing [s@macro-hangupcall:4] Hangup("SIP/999-00000024", "") in new stack
== Spawn extension (macro-hangupcall, s, 4) exited non-zero on 'SIP/999-00000024' in macro 'hangupcall'
== Spawn extension (ext-fax, h, 105) exited non-zero on 'SIP/999-00000024'