The software they work is probably a lot more complex and customized to Edison. The article notes that some systems are involved in emergency response, which wo

The software they work is probably a lot more complex and customized to Edison. The article notes that some systems are involved in emergency response, which would make the system a lot harder to maintain due to the more stringent requirements. To put it differently, think of a system that routes phone calls. Twilio and Plivo are great examples of such systems and are very reasonably priced. BUT you cannot route 911 calls through them[1] because they do not offer E911 support out of the box. Doing so would expose them to liability should their systems fail. Your home landline is required to have this and you pay quite a bit more. (Though if you ask me, WAY too much for what it really is.) Bottom line, critical/emergency systems cost more to run and maintain, with people bearing the responsibility costing more. [1]https://www.twilio.com/help/faq/voice/what-kind-of-phone-calls-cant-be-made-using-twili https://www.twilio.com/help/faq/voice/what-kind-of-phone-cal...