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Introduction
The CONEXANT™ RP56D, RP336D, and RP144D Modem Data Pump (MDP) families support data/fax modem, voice coding/decoding, optional full-duplex speakerphone, and optional AudioSpan (Table 1). Low voltage and small size support desktop applications. Downloadable architecture allows upgrading of MDP code from the host/DTE. In V. 90/K56flex mode (RP56), the MDP can receive data at speeds up to 56 kbps from a digitally connected V. 90or K56flex-compatible central site modem. These MDPs take advantage of the PSTN which is primarily digital except for the client modem to central office ...