The evaluation board can be operated in either Hardware mode or Host mode. In Hardware mode, switches and bed stake headers are used to control the line configuration and channel operations for all eight channels. In Host mode (Serial or Parallel), the evaluation software, switches, and bed stake headers are used to control the line configuration and operating mode settings for each channel. In both Hardware and Host modes, the board may be configured for E1 75 or E1 120 operating modes. In both modes binding post connectors provide easy connections between the line interface connections of the CS61880 and any E1 analyzing equipment, which may be used to evaluate the CS61880 device. Bed stake headers allow easy access to each channel's clock and data I/O digital interface.