Rolls PI9 II Telephone Output AdapterThe PI9 Phone Patch II from Rolls is a compact unit ideal for applications in broadcasting, conferencing, phone training, or any other time a phone call needs to be recorded or sent over a PA system. Simply connect the PI9 to a standard telephone connection, and it will use transformer isolation to direct the signal to a pair of RCA jacks or the 3. 5mm mini jack. The transformer isolation keeps the phone line separate from the output signal, meaning