Refactored to include Twilio-based SIP trunk.

asterisk/extensions.conf

@@ -0,0 +1,38 @@
+[+441234567890]
+    ; Redirect incoming calls from trunk with context +441234567890 to internal extension 0.
+    exten => _+X.,1,Goto(internal,0,1)
+    
+[outgoing]
+    ; Redirect all calls entering this context via SIP trunk "twilio".
+    exten => _X.,1,Dial(SIP/twilio/+${EXTEN})
+    same => n,Hangup
+
+
+[internal]
+    ; Dialplan for extension 1000.
+    ; Dial SIP user 1000. Timeout after 10 seconds.
+    exten => 1000,1,Dial(SIP/1000,10)
+    same => n,VoiceMail(${EXTEN})
+    same => n,Hangup
+    
+    ; Dialplan for extension 1001.
+    exten => 1001,1,Dial(SIP/1001,10)
+    same => n,VoiceMail(${EXTEN})
+    same => n,Hangup
+
+
+    ; Dialgroup "everyone" at extension 0 to ring mulitple extensions. 
+    exten => 0,1,Set(DIALGROUP(everyone,add)=SIP/1000)
+    same => n,Set(DIALGROUP(everyone,add)=SIP/1001)
+    same => n,Dial(${DIALGROUP(everyone)},10)
+    same => n,VoiceMail(${EXTEN})
+    same => n,Hangup
+
+
+    ; Dialplans for redirecting calls to outgoing context.
+    ; Redirect international calls in format 00441234567890.
+    exten => _00X.,1,Goto(outgoing,${EXTEN:2},1)
+    ; Redirect international calls in format +441234567890.
+    exten => _+X.,1,Goto(outgoing,${EXTEN:1},1)
+    ; Redirect outgoing national calls in format 01234567890.
+    exten => _0ZX.,1,Goto(outgoing,44${EXTEN:1},1)

asterisk/modules.conf

@@ -0,0 +1,2 @@
+[modules]
+    autoload=yes

asterisk/sip.conf

@@ -0,0 +1,35 @@
+[general]
+    ; Default context for incoming calls.
+    context=public
+    ; Determines whether a phone is available before accepting call.
+    qualify=yes
+
+; Settings common to all trunks.
+[trunk](!)
+    type=peer
+    nat=no
+    qualify=yes
+    insecure=port,invite
+    dtmfmode=rfc2833
+    allow=ulaw,alaw,G729
+
+; Settings common to all internal extensions.
+[internal](!)
+    context=internal
+    type=friend
+    host=dynamic
+    allow=ulaw,alaw,G729
+
+
+; Twilio trunk.
+[twilio](trunk)
+    context=+441234567890
+    fromuser=+441234567890
+    host=jacknet-gloucester.pstn.ie1.twilio.com
+
+; Internal extensions.
+[1000](internal)
+    secret=supersecurepassword
+
+[1001](internal)
+    secret=supersecurepassword

asterisk/voicemail.conf

@@ -0,0 +1,12 @@
+[general]
+    format=wav
+    maxsilence=10
+    maxmessage=180
+
+[default]
+    ; Voicemail inbox for missed dialgroup calls.
+    0 => 0000,0,test@example.com
+
+    ; Voicemail inboxes for individual extensions.
+    1000 => 0000,1000,test@example.com
+    1001 => 0000,1001,test@example.com