公开(公告)号：DE68922444D1

公开(公告)日：1995-06-08

申请号：DE68922444

申请日：1989-07-14

Applicant: IBM

Inventor： DAVIS GORDON TAYLOR ,  HO LUNG MICHAEL GEORGE ,  MANDALIA BAIJU DHIRAJLAL ,  MILLAS ROLAN JOSE ,  ORTEGA OSCAR EMILIO ,  PICON RAFAEL JOSE ,  QUEEN LORAN RAY ,  ROBINSON RICHARD HOUSTON ,  ROBINSON WILLIAM ROBERT ,  SHARP LEO ALVIN ,  VAN DEN BERG JAN WOUTER

IPC: H04M11/06 ,  H04J3/12 ,  H04L27/00

Abstract: A dual digital signal processor (DSP) provides real time links between multiple time division channels of a digital carrier system (e.g. T-1) and a host data processor. Operating only on digital signals, internally and at its interfaces to the carrier and host systems, the DSP exchanges data and control signalling information with the carrier system and data and control information with the host processor, converting the data in passage to different digital forms. At the interface to the carrier system, signals are received and transmitted in a form adapted to diverse terminal equipment of users remotely linked to the carrier system via the switched public network. At the host interface, signals are transferred and received in a form suited to the data process requirements of the host system (e.g. data bytes directly representing alphanumeric characters). Thus, the DSP acts as the equivalent of multiple different types of modems in performing required conversions. The DSP may also perform processing services in order to reduce the processing burden on the host system (e.g. parity checking of data, detection of specific character functions in data or specific tones in audio signals, selective routing of voice to host storage for voice mail applications, etc.)

公开(公告)号：DE68922444T2

公开(公告)日：1996-02-15

申请号：DE68922444

申请日：1989-07-14

Applicant: IBM

Inventor： DAVIS GORDON TAYLOR ,  HO LUNG MICHAEL GEORGE ,  MANDALIA BAIJU DHIRAJLAL ,  MILLAS ROLAN JOSE ,  ORTEGA OSCAR EMILIO ,  PICON RAFAEL JOSE ,  QUEEN LORAN RAY ,  ROBINSON RICHARD HOUSTON ,  ROBINSON WILLIAM ROBERT ,  SHARP LEO ALVIN ,  VAN DEN BERG JAN WOUTER

IPC: H04M11/06 ,  H04J3/12 ,  H04L27/00

Abstract: A dual digital signal processor (DSP) provides real time links between multiple time division channels of a digital carrier system (e.g. T-1) and a host data processor. Operating only on digital signals, internally and at its interfaces to the carrier and host systems, the DSP exchanges data and control signalling information with the carrier system and data and control information with the host processor, converting the data in passage to different digital forms. At the interface to the carrier system, signals are received and transmitted in a form adapted to diverse terminal equipment of users remotely linked to the carrier system via the switched public network. At the host interface, signals are transferred and received in a form suited to the data process requirements of the host system (e.g. data bytes directly representing alphanumeric characters). Thus, the DSP acts as the equivalent of multiple different types of modems in performing required conversions. The DSP may also perform processing services in order to reduce the processing burden on the host system (e.g. parity checking of data, detection of specific character functions in data or specific tones in audio signals, selective routing of voice to host storage for voice mail applications, etc.)