Added following snippits about Asterisk

* A Basic Asterisk server for internal calling with IVR, curl triggers and message playback
* A Asterisk server to act as a bridge between a Bluetooth phone (as in/out bound route)
* A Node-Red Subflow to create a call between extensions using ARI

Linux/Config-Examples/Asterisk-basic-server/extensions.conf

@@ -0,0 +1,45 @@
+; Asterisk exention configuration
+
+[from-internal]
+;Play audio message and hangup if 6010 is dialed
+exten = 6010,1,Answer()
+same = n,Wait(2)
+same = n,Playback(demo-congrats)
+same = n,Hangup()
+
+;Send http request, play audio message and hangup if 6011 is dialed
+exten = 6011,1,Answer()
+same = n,Wait(2)
+same = n,Set(CURL_RESULT=${CURL(http://<NoderedIP>:1880/endpoint/<ENDPOINT NAME>?exten=${EXTEN})})
+same = n,Playback(activated)
+same = n,Hangup()
+
+;Internal extentions (Phone,softphones or other Voip clients)
+; The number at the end (,30) sets the dial time out 
+exten => 6000,1,Dial(PJSIP/${EXTEN},30)
+
+;Connect to extenal the Homeassistent 'Assistent' service when 6020 is dialed
+exten => 6020,1,Dial(PJSIP/HomeAssistant,10)
+
+;IVR,
+;send to ivr if 6012 is dialed
+exten = 6012,1,Goto(ivr-test,s,1)
+
+;;The following section must be at the end of the file 
+[ivr-test]
+exten =>s,1,Answer()
+same =>n,set(IVRName=TestIVR)
+same => n,wait(2)
+same => n,Background(basic-pbx-ivr-main)
+same => n,WaitExten(10)
+;;Nr 1 to 4 are vaild options
+exten => _[1-4],1,Set(CURL_RESULT=${CURL(http://<NoderedIP>:1880/endpoint/<ENDPOINT NAME>?${IVRName}=${EXTEN})}
+same = n,Playback(activated)
+same = n,Playback(goodbye)
+same = n,Hangup()
+;;If option invalid
+exten => i,1,Playback(pm-invalid-option)
+exten => i,2,Goto(ivr-test,s,5)
+;; If timed out
+exten => t,1,Playback(vm-pls-try-again)
+exten => t,2,Goto(ivr-test,s,5)