What once was THE MOST highly traveled portal into a business has become a mere shadow of itself. The PBX / key system / Centrex, which processed all inbound phone calls to the business, was THE lifeline for nearly all businesses. And if the phone system was down, business screeched to a halt, executives stormed the telecommunications room door, and the hunt was on to identify the culprit (equipment or carrier) and exercise the contractual emergency response times. But the internet, email, texting, cell phones, online shopping, and other business...