The echo script can play a prompt before starting to echo back voice.

git-svn-id: http://yate.null.ro/svn/yate/trunk@3102 acf43c95-373e-0410-b603-e72c3f656dc1

share/scripts/echo.sh

@@ -4,9 +4,17 @@
 # Loops back audio data
 # To test add a route to: external/playrec/echo.sh
 
+prompt=""
+# put here a proper wave/play file to play before starting echoing
+# prompt="share/sounds/tone.wav"
+
 read
 echo "$REPLY" | sed 's/^[^:]*:\([^:]*\):.*$/%%<message:\1:true:/;'
 
+if [ -n "$prompt" -a -f "$prompt" ]; then
+    echo "================ play prompt ================" >&2
+    echo "%%>message::"`date +%s`":chan.attach::single=true:override=wave/play/$prompt"
+fi
 echo "=================== play ====================" >&2
 (sleep 1; cat) <&3 >&4
 echo "================= play done =================" >&2