Programmable multiple type data modem

Details Programmable multiple type data modem Programmable multiple type data modem

H - Electricity

04

M

354/232, 340/97

H04M 11/06 (2006.01) H04L 27/00 (2006.01)

Patent

CA 1219956

ABSTRACT PROGRAMMABLE MULTIPLE TYPE DATA MODEM A digital processor based voiceband modem (104) that provides computers and terminals access to telephone lines (102) and performs line control functions to originate, answer and terminate data calls in addition to converting baseband signals to voiceband and voiceband signals to baseband. The modem (104) utilizes a signal processor (124) that executes various signal converting algorithms under control of selected sets of instructions and further utilizes a digital processor (127) that executes line control algorithms for alternative modes (i.e. originate or answer) of the data modem. An outgoing or incoming call enables the appropriate mode and, during the execution of the corresponding line control algorithm, various sets of instructions are selected to execute signal converting algorithms appropriate for the enabled mode of a specific one of various data modem types.

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