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.extension.conf

@@ -0,0 +1,32 @@
+; Asterisk PJSIP  extention config
+
+;settings Homeassistent 'Assistent' service extention
+[HomeAssistant]
+type=endpoint
+context=from-external
+disallow=all
+allow=opus
+aors=HA
+send_connected_line=false
+rtp_keepalive=0
+user_eq_phone=no
+trust_id_inbound=no
+direct_media=no
+rtp_symmetric=yes
+auth=HomeAssistant
+aors=HomeAssistant
+;dtmf_mode=auto
+
+;Internal extentions (Phone,softphones or other Voip clients)
+
+[6000]
+type=endpoint
+context=from-internal
+callerid=DeskPhone <6000>
+disallow=all
+;Some phone may reqire other codecs,
+;the following are available ulaw,alaw,gsm,g726,g722,opus
+allow=g722
+auth=6000
+aors=6000
+