The WSA-00045 is a dual band duplexer which allows for simplified dual band handset testing, or can be used in dual band base station applications. The assembly contains two duplexers. The first provides AMPS band coverage of 824 to 849 MHz and 869 to 894 MHz. The second provides PCS band coverage of 1850 to 1910 MHz and 1930 to 1990 MHz (receive and transmit bands respectively). Each similar function port (for example, Rx-Rx, Tx-Tx, and Antenna to Antenna) are multiplexed together to provide the customer with single receive, transmit and antenna ports for integration to test systems.