ivr_flow.rb.patch

diff --git a/lib/ring_switch/call_flow/ivr_flow.rb b/lib/ring_switch/call_flow/ivr_flow.rb
index 3f0d0dd..71cb9ed 100644
--- a/lib/ring_switch/call_flow/ivr_flow.rb
+++ b/lib/ring_switch/call_flow/ivr_flow.rb
@@ -89,7 +89,8 @@ def hangup_received?
   # Robo caller tone detection
   ROBOT_TONES = {
     :fax_send_tone          => {:hz => 1100, :hits => 3, :timeout => 10.seconds},
-    :wardialer_modem_signal => {:hz => 2100, :hits => 3, :timeout => 10.seconds}
+    :wardialer_modem_signal => {:hz => 2100, :hits => 3, :timeout => 10.seconds},
+    :busy_signal            => {:hz => '480,620', :hits => 34, :timeout => 15.seconds},
   }
 
   def robot_deflector_enabled?

Nice! I would never have guessed 34 hits. I wonder how much time that equates to?