 V.32bis/V.32 Modem SoftwareCompany Description:The transmit and receive functions are called within a single function called V32_isr. This function is called to process received samples and to generate samples to transmit. The V32_init function is called to initialize the V.32/32bis modem. This function initializes the structure which contains all the memory required for the modem. The V.32/32bis modem can be adapted for a variety of sampling rates such as 9600 Hz or 7200Hz. The V.32bis/V.32 modem is designed to process data in 10ms intervals.FEATURES: -Full duplex mode of operation on switched and 2 wire, point-to-point, leased circuits. -Channel separation is accomplished using echo cancellation techniques. -QAM is used for each channel, with synchronous line transmission at 2400 baud. -Data signaling rates: 14400, 12000, 9600, 7200, and 4800 bps synchronous. -Trellis coding at rates from 7200 to 14000bps for V.32bis. -For V.32, two alternative modulation techniques are used for a signaling rate of 9600bps, one uses 16 carrier states and one uses trellis coding with 32 carrier states. -Exchange of rate sequences is provided during start-up to establish the data rate, coding, and any other special facilities. -The frequency carrier operates at 1800Hz. -Transmitted power levels conform to V.2 . -The modulation rate is 2400 symbols. Worldwide Headquarters:
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