The device is based on the industry-standard 8032 microcontroller core with a proprietary multiply accumulate coprocessor, Sigma-Delta A/D and D/A converters, and an analog front end with integrated silicon DAA interface. All ROM and RAM necessary to operate the modem are contained on the device. Units are capable of data transmission and reception through 2,300 bps. Intended for embedded applications and battery operation, they offer modem options from a 3.3 V low-power to conventional 5 V design with optional internal hybrid and fully programmable country call progress support including CTR-21.