6AV3515-1MA30 OP15/C1 OPERATOR PANEL 6AV3515-1MA30 OP15/C1 OPERATOR PANEL ,4 LINE DISPLAY, 20 CPL OR ,8 LINE DISPLAY, 40 CPL WITH INTEGRATED INTERFACES (2 X TTY/V.24 AND 1 X RS422) AND 8 SOFTKEYS