CA2014489A1 - Channel access system - Google Patents

Channel access system

Info

Publication number
CA2014489A1
CA2014489A1 CA2014489A CA2014489A CA2014489A1 CA 2014489 A1 CA2014489 A1 CA 2014489A1 CA 2014489 A CA2014489 A CA 2014489A CA 2014489 A CA2014489 A CA 2014489A CA 2014489 A1 CA2014489 A1 CA 2014489A1
Authority
CA
Canada
Prior art keywords
channel
signals
signaling
channel access
speed
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
CA2014489A
Other languages
French (fr)
Other versions
CA2014489C (en
Inventor
Minoru Ishikawa
Nobuki Nakata
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of CA2014489A1 publication Critical patent/CA2014489A1/en
Application granted granted Critical
Publication of CA2014489C publication Critical patent/CA2014489C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/914—Rate converter

Abstract

ABSTRACT OF THE DISCLOSURE
A channel access system comprises n channel parts for receiving m channels of voice signals and for outputting voice frequency data and signaling data, and a multiplexer part for receiving the voice frequency data and the signaling data of the m channels from the n channel parts and for supplying channel access signals to the n channel parts for designating a channel of the voice frequency data, where each of the n channel parts include a coder for coding a corresponding one of the voice signals into one of the voice frequency data, a decoder for decoding the channel access signals and for generating a synchronizing signal which is synchronized to a corresponding one of the channel access signals which designates its own channel, a signaling converter for converting the corresponding one of the signaling signals into a corresponding one of the signaling data, and a speed converting circuit for converting a transmission speed of the signaling data from a first transmission speed to a second transmission speed which is higher than the first transmission speed. The synchronizing signal controls a coding timing of the coder and a speed conversion timing of the speed converting circuit.
CA002014489A 1989-04-17 1990-04-12 Channel access system Expired - Fee Related CA2014489C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP96992/1989 1989-04-17
JP1096992A JPH0828695B2 (en) 1989-04-17 1989-04-17 Channel access method

Publications (2)

Publication Number Publication Date
CA2014489A1 true CA2014489A1 (en) 1990-10-18
CA2014489C CA2014489C (en) 1993-12-07

Family

ID=14179699

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002014489A Expired - Fee Related CA2014489C (en) 1989-04-17 1990-04-12 Channel access system

Country Status (5)

Country Link
US (1) US5020053A (en)
EP (1) EP0393514B1 (en)
JP (1) JPH0828695B2 (en)
CA (1) CA2014489C (en)
DE (1) DE69027804T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2962787B2 (en) * 1990-08-10 1999-10-12 富士通株式会社 Communication control method
JPH05168073A (en) * 1991-12-19 1993-07-02 Mitsubishi Electric Corp Device for inserting and extracting common line signal
US5475686A (en) * 1992-12-28 1995-12-12 Motorola, Inc. Method and apparatus for transferring data in a communication system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1588220A (en) * 1977-09-12 1981-04-15 Post Office Digital switching of electronic signals
JPS57164651A (en) * 1981-03-20 1982-10-09 Fujitsu Ltd Control system for switchboard
JPS58111450A (en) * 1981-12-24 1983-07-02 Fujitsu Ltd Speed conversion circuit for data sampling
US4627047A (en) * 1982-01-07 1986-12-02 Rockwell International Corp. Integrated voice and data telecommunication switching system
GB2153634B (en) * 1984-02-02 1987-03-25 Plessey Co Plc An arrangement for controlling switched speech or data communication in a communications exchange
JPS6238047A (en) * 1985-08-12 1987-02-19 Oki Electric Ind Co Ltd Multiplexing system
US4813040A (en) * 1986-10-31 1989-03-14 Futato Steven P Method and apparatus for transmitting digital data and real-time digitalized voice information over a communications channel
JPH0624341B2 (en) * 1986-12-18 1994-03-30 三菱電機株式会社 Multimedia data transmission system
US4815105A (en) * 1987-04-07 1989-03-21 Paradyne Corporation Selective signalling encoder/decoder for multipoint data communication networks
JPS63314930A (en) * 1987-06-18 1988-12-22 Toshiba Corp Multiplex communication equipment

Also Published As

Publication number Publication date
JPH02274135A (en) 1990-11-08
EP0393514A2 (en) 1990-10-24
JPH0828695B2 (en) 1996-03-21
DE69027804T2 (en) 1997-01-02
CA2014489C (en) 1993-12-07
EP0393514B1 (en) 1996-07-17
EP0393514A3 (en) 1992-09-23
DE69027804D1 (en) 1996-08-22
US5020053A (en) 1991-05-28

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed