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/pjsip.auth.conf

@@ -0,0 +1,15 @@
+; Asterisk PJSIP auth/credentials config
+
+;Credentials for extenal the Homeassistent 'Assistent' service
+[HomeAssistant]
+type=auth
+auth_type=userpass
+password=
+username=HA
+
+;Internal extentions (Phone,softphones or other Voip clients)
+[6000]
+type=auth
+auth_type=userpass
+password=<PASSWORD>
+username=6000