I guess I'll weigh in here, being a phone man for 35 years. It could have been a telephone tech testing your number, dialing a code and having it ring back to him. People can make their caller ID say what ever they want with the right equipment. My test gear allows me to do all of this. Power outages have nothing to do with your phone unless your local phone in your house requires electricity like a cordless phone. Electrical outages and phone outages have nothing to do with each other. Now all this is based on a typical land line from your local telephone company. Cable companies and the like run your TV, Internet and phone all over one high speed data connection, data is all IP based, VOIP is Voice over IP, meaning your voice is translated to a bit stream of 1's and 0's and then assembled back at the far end buy another piece of equipment to turn it into voice again. Kinda complicated but that's the dime store version.