Pcs-b768 isdn unit (optional), Pcs-dsb1 data solution box (optional), Pcs-b768 isdn unit – Sony PCS-1/1P User Manual

Page 182: Optional), Pcs-dsb1 data solution box, A status indicator, B status 1-6 indicators, C isdn 1-6 terminals (8-pin modular jack), D terminal connector, A rgb a input select button and indicator