The 9116LP can be deployed in a wide variety of business environments. Whether using standard PSTN service, Centrex or PBX, the 9116LP reliably delivers flawless performance. With a choice of powering via the PBX line or with the included DC power supply, it can be used in most business settings and will support all common CLASS and Voltage Message Waiting indication protocols. And, with a fail to POTS feature, the 9116LP will continue to provide basic telephone service in the event of a power failure.