Does the unit need an answering machine to work?

     The unit works flawlessly by itself on a phone line to remote power cycle and fully control the power status  ON or OFF ) of any connected device. It can work also with an answering machine, modem or fax for flawless operation. For answering machine operation you just need a quite section of tape either in your initial message to callers or while entering a message to hit the security codes on your touch tone phone to activate the unit.  You would configure the RPS II Unit for manual operation, which will allow you to enter the security codes for control of the power. )