DE69917304D1 - Verfahren und vorrichtung zur identifizierung der kodierungstype eines codes in einer telefonvermittlungsanlage - Google Patents
Verfahren und vorrichtung zur identifizierung der kodierungstype eines codes in einer telefonvermittlungsanlageInfo
- Publication number
- DE69917304D1 DE69917304D1 DE69917304T DE69917304T DE69917304D1 DE 69917304 D1 DE69917304 D1 DE 69917304D1 DE 69917304 T DE69917304 T DE 69917304T DE 69917304 T DE69917304 T DE 69917304T DE 69917304 D1 DE69917304 D1 DE 69917304D1
- Authority
- DE
- Germany
- Prior art keywords
- identifying
- code
- switching system
- telephone switching
- coding type
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
- H04L25/4927—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using levels matched to the quantisation levels of the channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques
-
- 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
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13034—A/D conversion, code compression/expansion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13199—Modem, modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13204—Protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13216—Code signals, frame structure
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US164155 | 1998-09-30 | ||
US09/164,155 US6381266B1 (en) | 1998-09-30 | 1998-09-30 | Method and apparatus for identifying the encoding type of a central office codec |
PCT/US1999/019527 WO2000019768A1 (en) | 1998-09-30 | 1999-08-26 | Method and apparatus for identifying the encoding type of a central office codec |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69917304D1 true DE69917304D1 (de) | 2004-06-17 |
DE69917304T2 DE69917304T2 (de) | 2005-05-12 |
Family
ID=22593224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69917304T Expired - Lifetime DE69917304T2 (de) | 1998-09-30 | 1999-08-26 | Verfahren und vorrichtung zur identifizierung der kodierungstype eines codes in einer telefonvermittlungsanlage |
Country Status (5)
Country | Link |
---|---|
US (3) | US6381266B1 (de) |
EP (1) | EP1118242B1 (de) |
DE (1) | DE69917304T2 (de) |
HK (1) | HK1040342B (de) |
WO (1) | WO2000019768A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6381266B1 (en) * | 1998-09-30 | 2002-04-30 | Conexant Systems, Inc. | Method and apparatus for identifying the encoding type of a central office codec |
US6181737B1 (en) * | 1999-01-28 | 2001-01-30 | Pc Tel, Inc. | Distinguishing received A-law and μ-law signals in a PCM modem |
US6721279B1 (en) * | 1999-02-02 | 2004-04-13 | Pctel, Inc. | Method and apparatus for adaptive PCM level estimation and constellation training |
US6600780B1 (en) | 1999-03-10 | 2003-07-29 | Agere Systems Inc. | Apparatus and method for adapting a filter of an analog modem |
US6570917B1 (en) * | 1999-03-10 | 2003-05-27 | Agere Systems Inc. | Equalizer training in the presence of network impairment |
US6721357B1 (en) | 1999-06-24 | 2004-04-13 | Intel Corporation | Constellation generation and re-evaluation |
US7339996B2 (en) | 1999-06-24 | 2008-03-04 | Intel Corporation | Receiver codec super set constellation generator |
US6724814B1 (en) * | 1999-06-24 | 2004-04-20 | Intel Corporation | Pad and CODEC detection |
US6721363B1 (en) | 1999-06-24 | 2004-04-13 | Intel Corporation | Receiver CODEC super set constellation generator |
US7366470B1 (en) | 1999-06-24 | 2008-04-29 | Intel Corporation | Inter-modulation distortion compensation |
US7307980B1 (en) * | 1999-07-02 | 2007-12-11 | Cisco Technology, Inc. | Change of codec during an active call |
US6650657B1 (en) * | 1999-10-29 | 2003-11-18 | International Business Machines Corporation | Systems, methods and computer program products for identifying digital impairments in modem signals |
US6751260B1 (en) * | 2000-03-16 | 2004-06-15 | Agere Systems, Inc. | Detecting superimposed information channels for modem connections |
US6687306B1 (en) * | 2000-03-16 | 2004-02-03 | Agere Systems Inc. | Constellation adjustment based on detected encoding and encoding conversion for modem connections |
US6693967B1 (en) * | 2000-03-16 | 2004-02-17 | Agere Systems Inc. | Detecting encoding and encoding conversion for modem connections |
US6560277B2 (en) * | 2001-02-09 | 2003-05-06 | Pc Tel, Inc. | Distinguishing between final coding of received signals in a PCM modem |
US7180916B2 (en) * | 2001-04-27 | 2007-02-20 | Agere Systems Inc. | Compensating for random robbed bit signaling |
JP4027318B2 (ja) * | 2001-11-27 | 2007-12-26 | シーメンス アクチエンゲゼルシヤフト | 少なくとも2つの加入者端末機器間において異なる符号化規則に従って形成された有効情報を交換する方法 |
US7472057B2 (en) * | 2003-10-17 | 2008-12-30 | Broadcom Corporation | Detector for use in voice communications systems |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4021652A (en) * | 1975-12-11 | 1977-05-03 | Northern Electric Company Limited | Incrementally adjustable digital attenuator/amplifier |
US4243342A (en) * | 1979-07-27 | 1981-01-06 | J. I. Case Company | Snap fast fastener |
JPS5723356A (en) * | 1980-07-02 | 1982-02-06 | Hitachi Ltd | Sound signal converter |
JPS58165441A (ja) * | 1982-03-26 | 1983-09-30 | Hitachi Ltd | Pcm信号符号器 |
JPH0657075B2 (ja) * | 1984-05-29 | 1994-07-27 | 富士通株式会社 | ディジタル通話路装置 |
US4819253A (en) * | 1988-05-16 | 1989-04-04 | Bell Communications Research, Inc. | Method for determining PCM coding law |
US5243342A (en) * | 1990-09-28 | 1993-09-07 | Stratacom, Inc. | Integrated PCM level control and conversion using a lookup table |
EP0564143B1 (de) | 1992-03-31 | 2001-11-21 | Texas Instruments Incorporated | Mehrmoden-Analog/Digitalwandler und Verfahren |
US5311578A (en) * | 1992-05-07 | 1994-05-10 | At&T Bell Laboratories | Technique for automatic identification of a remote modem |
JPH07123172A (ja) * | 1993-10-25 | 1995-05-12 | Canon Inc | 端末装置 |
JPH07193619A (ja) * | 1993-10-27 | 1995-07-28 | Canon Inc | デジタル電話機及びその動作方法 |
CA2118277C (en) | 1993-12-23 | 1998-09-22 | Alexander Feiner | Facility type determination technique |
US5497373A (en) * | 1994-03-22 | 1996-03-05 | Ericsson Messaging Systems Inc. | Multi-media interface |
US5793809A (en) | 1995-05-31 | 1998-08-11 | Paradyne Corporation | Transparent technique for Mu-law modems to detect an all-digital circuit connection |
US5784405A (en) * | 1996-08-23 | 1998-07-21 | Paradyne Corporation | Noncooperative feedback system and method for a compensation system associated with a transmitter or CODEC |
US5825816A (en) * | 1997-02-14 | 1998-10-20 | General Datacomm, Inc. | Spectral and power shaping mapper for high data rate signalling |
US5822371A (en) | 1997-02-14 | 1998-10-13 | General Datacomm Inc. | Mapper for high data rate signalling |
US5825823A (en) * | 1997-06-06 | 1998-10-20 | General Datacomm, Inc. | PCM channel diagnosis |
US5887027A (en) * | 1997-12-24 | 1999-03-23 | Lucent Technologies Inc. | Method of upstream channel modeling for PCM modem |
US6034991A (en) * | 1998-01-26 | 2000-03-07 | Conexant Systems, Inc. | Method and apparatus for implementing enhanced multiple modulus conversion techniques in a signal point mapping context |
US6381266B1 (en) * | 1998-09-30 | 2002-04-30 | Conexant Systems, Inc. | Method and apparatus for identifying the encoding type of a central office codec |
-
1998
- 1998-09-30 US US09/164,155 patent/US6381266B1/en not_active Expired - Lifetime
-
1999
- 1999-08-26 DE DE69917304T patent/DE69917304T2/de not_active Expired - Lifetime
- 1999-08-26 WO PCT/US1999/019527 patent/WO2000019768A1/en active IP Right Grant
- 1999-08-26 EP EP99943944A patent/EP1118242B1/de not_active Expired - Lifetime
-
2002
- 2002-01-25 HK HK02100630.4A patent/HK1040342B/zh not_active IP Right Cessation
- 2002-01-30 US US10/060,152 patent/US6614839B2/en not_active Expired - Fee Related
-
2003
- 2003-07-02 US US10/614,434 patent/US7173963B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
HK1040342A1 (en) | 2002-05-31 |
EP1118242B1 (de) | 2004-05-12 |
EP1118242A1 (de) | 2001-07-25 |
US6381266B1 (en) | 2002-04-30 |
US20020085629A1 (en) | 2002-07-04 |
US7173963B2 (en) | 2007-02-06 |
DE69917304T2 (de) | 2005-05-12 |
US20040013185A1 (en) | 2004-01-22 |
HK1040342B (zh) | 2005-01-07 |
WO2000019768A1 (en) | 2000-04-06 |
US6614839B2 (en) | 2003-09-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |