If the attendant is on a call and presses any key on the keypad, the system automatically splits the current call, places the call on hold, and dials the next call. The system disables the Start button, and stops support for end-to-end signaling..

To extend a current call to another extension, the attendant dials the extension. The system automatically places the current call on hold. Once the called party answers, the attendant presses the Release button to extend the call.