An optional card including a digital signal processor (DSP) for use by a modem daughter board, where the modem daughter board is equipped with a data access arrangement (DAA) for upgrading a computer system to include modem and facsimile capabilities. The optional card may preferably be a sound board...http://www.google.de/patents/US6851042?utm_source=gb-gplus-sharePatent US6851042 - Audio, fax and modem capabilities with a digital signal processor of a sound card of a computer system
