Yes, I have done alarms and most every type of low-voltage work over the last 50 years.
With respect to the customer of mine, whose behavior started this thread, here is the updated story:
One of the customer's employees thought the system was dead. It had been unplugged and lost its memory. They called the Avaya number on a sticker on the old KSU. That number forwards to a company that has taken over all the old Avaya accounts. They rolled a truck and sold the customer a new system. What they should have done, in my humble opinion, is asked the customer who usually serviced the system, then called me to respond.
Whether or not the customer did something wrong, the vendor certainly did something unethical.
