WO1999033311A1 - An apparatus for interfacing a multi-channel digital link and a plurality of analog lines - Google Patents

An apparatus for interfacing a multi-channel digital link and a plurality of analog lines Download PDF

Info

Publication number
WO1999033311A1
WO1999033311A1 PCT/FI1998/000998 FI9800998W WO9933311A1 WO 1999033311 A1 WO1999033311 A1 WO 1999033311A1 FI 9800998 W FI9800998 W FI 9800998W WO 9933311 A1 WO9933311 A1 WO 9933311A1
Authority
WO
WIPO (PCT)
Prior art keywords
analog
signal processing
bus system
tdm bus
lines
Prior art date
Application number
PCT/FI1998/000998
Other languages
English (en)
French (fr)
Inventor
Luca Vicini
Original Assignee
Nokia Networks Oy
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 Nokia Networks Oy filed Critical Nokia Networks Oy
Priority to AU16747/99A priority Critical patent/AU1674799A/en
Publication of WO1999033311A1 publication Critical patent/WO1999033311A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/002—Applications of echo suppressors or cancellers in telephonic connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13031—Pulse code modulation, PCM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1305—Software aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13107—Control equipment for a part of the connection, distributed control, co-processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1319—Amplifier, attenuation circuit, echo suppressor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13292—Time division multiplexing, TDM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13396—Signaling in general, in-band signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13405—Dual frequency signaling, DTMF

Definitions

  • the invention relates to telephone systems and, more particularly, to signal processing functions in association with analog line interfaces.
  • a number of analog subscriber interfaces in a multiplexer (such as multiplexers 14, 16 and 21) is often very high, because the digital link is nor- mally at least 2 Mbits/s multi-channel PCM (Pulse Code Modulation) link. This means capacity of 30 subscriber channels and two signalling channels in minimum.
  • PCM Pulse Code Modulation
  • a TDM bus system is provided between a digital link interface circuit and analog line interface circuits for transferring user information signals in two directions.
  • a multi-channel digital signal processing unit is connected to the TDM bus system for selectively signal processing the information signals transferred on the TDM bus system. Which information signals are selected for signal processing and which signal processing function is performed on each specific selected information signal is determined by a software of the apparatus.
  • the apparatus is very flexible and scaleable, as it is very easy to add, modify or completely change the signal processing functions by a simple software change without redesigning and changing the hardware. Also additional analog lines can be added without hardware modifications. Tailored signal processing functions can be easily provided for each single application with the same universal hardware, which will significantly reduce the cost of development and manufacture.
  • the decoupling circuit 36 is series connected on the serial receive TDM bus 33A.
  • the input port and the output port of the serial interface 35A in the DSP unit 35 is connected to the input and output of the decoupling circuit 36, respectively.
  • the decoupling circuit 36 is controlled by the DSP unit 35 to switch a direct connection through the decoupling device 36 so as allow the information signals on the TDM bus 35A to go straight to the DLIU 31 , or to break the direct connection in order to route the information signals to pass through the DSP unit 35 to be signal processed before being forwarded to DLIU 31.
  • a decoupling circuit is controlled by the DSP unit 35 to switch a direct connection through the decoupling device 36 so as allow the information signals on the TDM bus 35A to go straight to the DLIU 31 , or to break the direct connection in order to route the information signals to pass through the DSP unit 35 to be signal processed before being forwarded to DLIU 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
PCT/FI1998/000998 1997-12-19 1998-12-18 An apparatus for interfacing a multi-channel digital link and a plurality of analog lines WO1999033311A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU16747/99A AU1674799A (en) 1997-12-19 1998-12-18 An apparatus for interfacing a multi-channel digital link and a plurality of analog lines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI974579 1997-12-19
FI974579A FI105642B (fi) 1997-12-19 1997-12-19 Laite monikanavaisen digitaalisen yhteyden ja useiden analogisten linjojen liittämiseksi toisiinsa

Publications (1)

Publication Number Publication Date
WO1999033311A1 true WO1999033311A1 (en) 1999-07-01

Family

ID=8550179

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000998 WO1999033311A1 (en) 1997-12-19 1998-12-18 An apparatus for interfacing a multi-channel digital link and a plurality of analog lines

Country Status (3)

Country Link
AU (1) AU1674799A (fi)
FI (1) FI105642B (fi)
WO (1) WO1999033311A1 (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1353527A1 (de) * 2002-04-09 2003-10-15 Siemens AG Signalverarbeitungseinheit mit seriellen Zeitmultiplexverbindungen zwischen Signalverarbeitungs- und Steuermitteln
CN111025968A (zh) * 2019-12-05 2020-04-17 深圳震有科技股份有限公司 Dsp收号故障检测处理方法及装置、计算机设备、介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178479A (en) * 1978-02-06 1979-12-11 Trw, Inc. Communication processor apparatus for use in a TDM switching system
US4366566A (en) * 1978-08-12 1982-12-28 Cochennec Jean Yves System for interconnecting subscribers lines to an automatic digital telephone switching system
GB2185657A (en) * 1986-01-22 1987-07-22 Stc Plc Automatic telecommunication system
GB2213024A (en) * 1987-11-24 1989-08-02 Stc Plc Data transmission system
US5065425A (en) * 1988-12-23 1991-11-12 Telic Alcatel Telephone connection arrangement for a personal computer and a device for such an arrangement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178479A (en) * 1978-02-06 1979-12-11 Trw, Inc. Communication processor apparatus for use in a TDM switching system
US4366566A (en) * 1978-08-12 1982-12-28 Cochennec Jean Yves System for interconnecting subscribers lines to an automatic digital telephone switching system
GB2185657A (en) * 1986-01-22 1987-07-22 Stc Plc Automatic telecommunication system
GB2213024A (en) * 1987-11-24 1989-08-02 Stc Plc Data transmission system
US5065425A (en) * 1988-12-23 1991-11-12 Telic Alcatel Telephone connection arrangement for a personal computer and a device for such an arrangement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1353527A1 (de) * 2002-04-09 2003-10-15 Siemens AG Signalverarbeitungseinheit mit seriellen Zeitmultiplexverbindungen zwischen Signalverarbeitungs- und Steuermitteln
WO2003086006A1 (de) * 2002-04-09 2003-10-16 Siemens Aktiengsellschaft Signalverarbeitungseinheit mit seriellen zeitmultiplexverbindungen zwischen signalverarbeitungs- und steuermitteln
CN111025968A (zh) * 2019-12-05 2020-04-17 深圳震有科技股份有限公司 Dsp收号故障检测处理方法及装置、计算机设备、介质
CN111025968B (zh) * 2019-12-05 2022-09-27 深圳震有科技股份有限公司 Dsp收号故障检测处理方法及装置、计算机设备、介质

Also Published As

Publication number Publication date
FI974579A0 (fi) 1997-12-19
FI974579A (fi) 1999-06-20
FI105642B (fi) 2000-09-15
AU1674799A (en) 1999-07-12

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