CA2085753A1 - Time division multiplexer chip and process thereof - Google Patents

Time division multiplexer chip and process thereof

Info

Publication number
CA2085753A1
CA2085753A1 CA2085753A CA2085753A CA2085753A1 CA 2085753 A1 CA2085753 A1 CA 2085753A1 CA 2085753 A CA2085753 A CA 2085753A CA 2085753 A CA2085753 A CA 2085753A CA 2085753 A1 CA2085753 A1 CA 2085753A1
Authority
CA
Canada
Prior art keywords
communication
bus
ram
interface
time division
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2085753A
Other languages
French (fr)
Other versions
CA2085753C (en
Inventor
Daniel F. Daly
John J. Dwyer
Salvatore J. Morlando
Mark Sekas
Shamla V. Sharma
Judith Dixon-Otton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dictaphone Corp
Original Assignee
Dictaphone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dictaphone Corp filed Critical Dictaphone Corp
Publication of CA2085753A1 publication Critical patent/CA2085753A1/en
Application granted granted Critical
Publication of CA2085753C publication Critical patent/CA2085753C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0421—Circuit arrangements therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
    • H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems
    • H04M3/533—Voice mail systems

Abstract

A time division multiplexer (TDM) chip having particular application in a digital voice processing system wherein voice processing functions are run in software. The TDM chip has a pair of RAMs which are in communication with a bus and at least one interface that provides communication with other devices. An bank switch controls the RAMs so that their communication with the bus and the interface alternates, i.e. while the first RAM is in communication with the interface the other RAM is in communication with the bus. After a determined period the communications are reversed. This scheme provides faster processing and more efficient use of the components. Including is a provision for allowing multiple interfaces to communicate with the RAM
alternatively in a time shared manner.
CA002085753A 1991-12-31 1992-12-18 Time division multiplexer chip and process thereof Expired - Fee Related CA2085753C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US816,404 1991-12-31
US07/816,404 US5404455A (en) 1991-12-31 1991-12-31 Time division multiplexer chip for supporting alternating communication between a pair of RAMs and two different interfaces

Publications (2)

Publication Number Publication Date
CA2085753A1 true CA2085753A1 (en) 1993-07-01
CA2085753C CA2085753C (en) 1998-09-29

Family

ID=25220497

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002085753A Expired - Fee Related CA2085753C (en) 1991-12-31 1992-12-18 Time division multiplexer chip and process thereof

Country Status (4)

Country Link
US (1) US5404455A (en)
EP (1) EP0554626B1 (en)
CA (1) CA2085753C (en)
DE (1) DE69231032T2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE41292E1 (en) 1993-08-03 2010-04-27 Nice Systems Inc. Modular digital recording logger

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404455A (en) * 1991-12-31 1995-04-04 Dictaphone Corporation Time division multiplexer chip for supporting alternating communication between a pair of RAMs and two different interfaces
JPH07121181A (en) * 1993-10-27 1995-05-12 Sony Corp Sound information processor
US5812882A (en) * 1994-10-18 1998-09-22 Lanier Worldwide, Inc. Digital dictation system having a central station that includes component cards for interfacing to dictation stations and transcription stations and for processing and storing digitized dictation segments
US7421066B1 (en) * 1996-06-12 2008-09-02 Estech Systems, Inc. Telephone call/voice processing system
US6859525B1 (en) 1996-10-23 2005-02-22 Riparius Ventures, Llc Internet telephony device
US6775372B1 (en) 1999-06-02 2004-08-10 Dictaphone Corporation System and method for multi-stage data logging
US6249570B1 (en) * 1999-06-08 2001-06-19 David A. Glowny System and method for recording and storing telephone call information
US6252946B1 (en) * 1999-06-08 2001-06-26 David A. Glowny System and method for integrating call record information
US6252947B1 (en) * 1999-06-08 2001-06-26 David A. Diamond System and method for data recording and playback
US6246752B1 (en) * 1999-06-08 2001-06-12 Valerie Bscheider System and method for data recording
SE524148C2 (en) * 2002-01-29 2004-07-06 Sandvik Ab Tool coupling for rotating tools with control means between the tool parts
US7539301B2 (en) * 2004-04-19 2009-05-26 Computer Performance, Inc. Cost-effective multichannel digital logger

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772657A (en) * 1971-11-30 1973-11-13 Mi2 Inc Columbus Magnetic tape data handling system employing dual data block buffers
US4298954A (en) * 1979-04-30 1981-11-03 International Business Machines Corporation Alternating data buffers when one buffer is empty and another buffer is variably full of data
CA1162314A (en) * 1979-12-07 1984-02-14 Hideo Ota Data input/output method and system
US4549047A (en) * 1982-07-22 1985-10-22 Voicemail International, Inc. Digitized voice message storage system
US4602331A (en) * 1983-06-30 1986-07-22 Burroughs Corporation Magnetic tape-data link processor providing automatic data transfer
US4799144A (en) * 1984-10-12 1989-01-17 Alcatel Usa, Corp. Multi-function communication board for expanding the versatility of a computer
US4785473A (en) * 1984-11-27 1988-11-15 Genesis Electronics Corporation Interactive audio telecommunications message storage, forwarding and retrieval system
US5163132A (en) * 1987-09-24 1992-11-10 Ncr Corporation Integrated controller using alternately filled and emptied buffers for controlling bi-directional data transfer between a processor and a data storage device
CA1311818C (en) * 1987-12-29 1992-12-22 Nec Corporation Time division switching for multi-channel calls using two time switch memories acting as a frame aligner
US4955054A (en) * 1988-10-05 1990-09-04 Precision Software Incorporated Integrated telecommunication system with improved digital voice response
US5031146A (en) * 1988-12-22 1991-07-09 Digital Equipment Corporation Memory apparatus for multiple processor systems
JP2803262B2 (en) * 1989-12-15 1998-09-24 日本電気株式会社 Packet switch
US5404455A (en) * 1991-12-31 1995-04-04 Dictaphone Corporation Time division multiplexer chip for supporting alternating communication between a pair of RAMs and two different interfaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE41292E1 (en) 1993-08-03 2010-04-27 Nice Systems Inc. Modular digital recording logger

Also Published As

Publication number Publication date
US5404455A (en) 1995-04-04
EP0554626A3 (en) 1994-11-02
EP0554626A2 (en) 1993-08-11
EP0554626B1 (en) 2000-05-10
CA2085753C (en) 1998-09-29
DE69231032D1 (en) 2000-06-15
DE69231032T2 (en) 2001-01-11

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed