11 Embarrassing leased line costs Faux Pas You Better Not Make
http://32.org.uk/Is-Artificial-Intelligence-Making-Leased-Lines-More-Or-Less-Noteworthy-.html
If you have any other products or services you can add in like VoIP, firewalls or cloud services it can help reduce the cost even further. Any delay in sending a command or receiving a response from control center