Take inventory of all analog lines in your facility, and convert as many as possible to your PRI via analog card technology. Remember that some services like elevators, burglar alarms and fire alarms must be run over analog lines, and cannot be converted. Although they will actually work over the PRI in most cases, you put your facility at risk for regular false alarms during carrier line testing and severe liability in case of emergency. In addition, if the electricity is out at your facility, and your battery backup is depleted, your facility is wide open for theft and fire without proper authority notification. As always, work with your telecommunications professional to conduct a thorough facility audit before converting or disconnecting lines.