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-BT_bridge/ReadMe.md

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+# Asterisk sever BT bridge
+Go [Here](../../Docs/Setup-Asterisk-Server.md) to read about how to set it up
+
+
+**Config files that are empty**  
+these are just here to suppress errors
+* ```acl.conf```
+* ```ccss.conf```
+* ```cdr.conf```
+* ```cel.conf```
+* ```features.conf```
+* ```pjproject.conf```
+* ```pjsip_wizard.conf```
+
+
+
+**Config files for basic usage**  
+If a config file does not have a comment is does not require any tweaking  
+`*` Must be updated before first use
+* ```asterisk.conf```
+* ```logger.conf```
+* ```modules.conf``` 
+* ```udptl.conf```
+* ```chan_mobile.conf``` Settings for bluetooth `*`
+* ```extentions.conf``` Dial plan for extension
+* ```indications.conf``` Settings for dial tones
+* ```pjsip.conf``` Sets listening for PJSIP and defines the credentials for the extensions `*`

Linux/Config-Examples/Asterisk-BT_bridge/acl.conf

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+; Asterisk ACL configuration

Linux/Config-Examples/Asterisk-BT_bridge/asterisk.conf

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+; Asterisk core configuration
+[directories](!)
+astcachedir => /tmp
+astetcdir => /etc/asterisk
+astmoddir => /usr/lib/asterisk/modules
+astvarlibdir => /var/lib/asterisk
+astdbdir => /var/lib/asterisk
+astkeydir => /var/lib/asterisk
+astdatadir => /var/lib/asterisk
+astagidir => /var/lib/asterisk/agi-bin
+astspooldir => /var/spool/asterisk
+astrundir => /var/run/asterisk
+astlogdir => /var/log/asterisk
+astsbindir => /usr/sbin
+
+[options]
+;verbose = 3
+;debug = 3
+documentation_language = en_US

Linux/Config-Examples/Asterisk-BT_bridge/ccss.conf

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+; Asterisk ccss (Call Completion Supplementary Services) configuration

Linux/Config-Examples/Asterisk-BT_bridge/cdr.conf

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+; Asterisk cdr (Call Detail Record engine) configuration

Linux/Config-Examples/Asterisk-BT_bridge/cel.conf

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+; Asterisk CEL (Channel Event Logging) configuration

Linux/Config-Examples/Asterisk-BT_bridge/chan_mobile.conf

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+; Asterisk Chan Mobile configuration
+[general]
+interval=30
+
+[adapter]
+id=hci0
+address=<Adapter MAC> ;MAC of adapter
+
+[phone0]
+context=incoming-mobile
+address=<Phone MAC> ; MAC of Phone
+adapter=hci0   
+port=1   ;port number (from mobile search) 

Linux/Config-Examples/Asterisk-BT_bridge/extensions.conf

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+; Asterisk exention configuration
+
+[from-internal]
+;Internal extentions (Phone,softphones or other Voip clients)
+exten => 7000,1,Dial(PJSIP/${EXTEN},30)
+
+;Outbound route
+exten => _X.,1,Dial(mobile/phone0/${EXTEN})
+
+;Inbound route
+[incoming-mobile]
+exten => s,1,Goto(from-internal,7000,1)

Linux/Config-Examples/Asterisk-BT_bridge/features.conf

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+; Asterisk Call Features (transfer, monitor/mixmonitor, etc) configuration

Linux/Config-Examples/Asterisk-BT_bridge/indications.conf

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+; Asterisk indication (location specific tone indications) configuration
+
+[general]
+country=nl
+
+[nl]
+description = Netherlands
+ringcadence = 1000,4000
+dial = 425
+busy = 425/500,0/500
+ring = 425/1000,0/4000
+congestion = 425/250,0/250
+callwaiting = 425/500,0/9500
+dialrecall = 425/500,0/50
+record = 1400/500,0/15000
+info = 950/330,1400/330,1800/330,0/1000
+stutter = 425/500,0/50
+
+[us]
+description = United States / North America
+ringcadence = 2000,4000
+dial = 350+440
+busy = 480+620/500,0/500
+ring = 440+480/2000,0/4000
+congestion = 480+620/250,0/250
+callwaiting = 440/300,0/10000
+dialrecall = !350+440/100,!0/100,!350+440/100,!0/100,!350+440/100,!0/100,350+440
+record = 1400/500,0/15000
+info = !950/330,!1400/330,!1800/330,0
+stutter = !350+440/100,!0/100,!350+440/100,!0/100,!350+440/100,!0/100,!350+440/100,!0/100,!350+440/100,!0/100,!350+440/100,!0/100,350+440

Linux/Config-Examples/Asterisk-BT_bridge/logger.conf

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+; Asterisk logging configuration
+
+[general]
+
+[logfiles]
+console => notice,warning,error
+messages => notice,warning,error

Linux/Config-Examples/Asterisk-BT_bridge/modules.conf

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+; Asterisk Module Loader configuration file
+
+[modules]
+autoload=no
+
+;Core
+load = app_dial.so
+load = pbx_config.so
+load = pbx_loopback.so
+load = pbx_realtime.so
+load = pbx_spool.so
+load = func_callerid.so
+load = func_dialplan.so
+load = func_dialgroup.so
+load = res_ael_share.so
+load = res_timing_timerfd.so
+
+;Codecs
+load = codec_alaw.so
+load = codec_g722.so
+load = codec_g726.so
+load = codec_gsm.so
+load = codec_opus_open_source.so
+load = codec_resample.so
+load = codec_ulaw.so
+
+;Formats
+load = format_g719.so
+load = format_g726.so
+load = format_gsm.so
+load = format_siren14.so
+load = format_siren7.so
+load = format_wav.so
+load = format_wav_gsm.so
+load = res_format_attr_g729.so
+load = res_format_attr_opus.so
+load = res_format_attr_siren14.so
+load = res_format_attr_siren7.so
+
+;PJSIP
+require = chan_pjsip.so
+load = func_pjsip_aor.so
+load = func_pjsip_endpoint.so
+load = res_pjproject.so
+load = res_pjsip.so
+load = res_pjsip_authenticator_digest.so
+load = res_pjsip_caller_id.so
+load = res_pjsip_endpoint_identifier_ip.so
+load = res_pjsip_endpoint_identifier_user.so
+load = res_pjsip_exten_state.so
+load = res_pjsip_outbound_publish.so
+load = res_pjsip_outbound_registration.so
+load = res_pjsip_path.so
+load = res_pjsip_pubsub.so
+load = res_pjsip_refer.so
+load = res_pjsip_registrar.so
+load = res_pjsip_sdp_rtp.so
+load = res_pjsip_session.so
+
+;RTP
+load = chan_rtp.so
+load = bridge_native_rtp.so
+load = res_rtp_asterisk.so
+load = res_rtp_multicast.so
+
+;Bridge
+load = bridge_simple.so
+load = bridge_builtin_features.so
+
+;Sorcery
+load = res_sorcery_astdb.so
+load = res_sorcery_config.so
+load = res_sorcery_memory.so
+
+;BT Interface
+require = chan_mobile.so

Linux/Config-Examples/Asterisk-BT_bridge/pjproject.conf

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+; Asterisk pjproject options

Linux/Config-Examples/Asterisk-BT_bridge/pjsip.conf

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+; Asterisk PJSIP config
+
+[transport-udp]
+type=transport
+protocol=udp
+bind=0.0.0.0
+
+;Internal VoipClient
+[7000]
+type=endpoint
+context=from-internal
+callerid=DeskPhone <7000>
+disallow=all
+;Some phone may reqire other codecs,
+;the following are available ulaw,alaw,gsm,g726,g722,opus
+allow=g722
+auth=7000
+aors=7000
+
+[7000]
+type=auth
+auth_type=userpass
+password=<Password>
+username=7000
+
+[7000]
+type=aor
+; if one device is connected setting '1' is okay
+; when a device sometimes fails to register (like my Friz!box) try increasing it, '5' is a safe value
+max_contacts=1

Linux/Config-Examples/Asterisk-BT_bridge/pjsip_wizard.conf

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+; Asterisk PJSIP Wizard configuration

Linux/Config-Examples/Asterisk-BT_bridge/udptl.conf

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+; Asterisk udptl config
+
+[general]
+udptlstart=4000
+udptlend=4999
+udptlfecentries = 3
+udptlfecspan = 3
+use_even_ports = no