Table 8-32. Internal Components of Duplexer Item No. Part No. Exchange No. Quantity Description 1 C4123A C4123-69001 1 Duplexer 2 RB1-9044-000CN 1 Cover, Top 3 RB1-9047-000CN 1 Cover, Right Duplexer 4 RF5-1876-000CN 1 Cover, Left with Connector 5 RB1-9045-000CN 1 Panel, Rear 6 RH7-1361-000CN 1 Fan Illustrations and Parts Lists 8-57