EP1121786A1 - Fast dtmf identification - Google Patents
Fast dtmf identificationInfo
- Publication number
- EP1121786A1 EP1121786A1 EP99941106A EP99941106A EP1121786A1 EP 1121786 A1 EP1121786 A1 EP 1121786A1 EP 99941106 A EP99941106 A EP 99941106A EP 99941106 A EP99941106 A EP 99941106A EP 1121786 A1 EP1121786 A1 EP 1121786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- tone
- transmission
- tones
- voice
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
- H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
- H04M7/1295—Details of dual tone multiple frequency signalling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
- H04L2012/6475—N-ISDN, Public Switched Telephone Network [PSTN]
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US374203 | 1989-06-30 | ||
US37420399A | 1999-08-12 | 1999-08-12 | |
PCT/US1999/018401 WO2001013586A1 (en) | 1999-08-12 | 1999-08-13 | Fast dtmf identification |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1121786A1 true EP1121786A1 (en) | 2001-08-08 |
EP1121786A4 EP1121786A4 (en) | 2007-05-30 |
Family
ID=23475770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99941106A Withdrawn EP1121786A4 (en) | 1999-08-12 | 1999-08-13 | Fast dtmf identification |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1121786A4 (en) |
JP (1) | JP2003507933A (en) |
AU (1) | AU5482499A (en) |
WO (1) | WO2001013586A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7035293B2 (en) | 2001-04-18 | 2006-04-25 | Broadcom Corporation | Tone relay |
US20030194082A1 (en) | 2002-04-15 | 2003-10-16 | Eli Shoval | Method and apparatus for transmitting signaling tones over a packet switched network |
CN102790958B (en) * | 2012-06-29 | 2016-03-30 | 华为终端有限公司 | A kind of method of command transmitting and device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5666357A (en) * | 1995-03-23 | 1997-09-09 | Hughes Electronics | DTMF tone passer in a voice communication system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1268570A (en) * | 1987-08-14 | 1990-05-01 | Melvin J. Roberts | Telephone tone detector |
US5295178A (en) * | 1990-12-03 | 1994-03-15 | Ericsson Ge Mobile Communications Inc. | Digital signal processor for radio base station |
US5721729A (en) * | 1996-01-24 | 1998-02-24 | Klingman; Edwin E. | Universal input call processing system |
-
1999
- 1999-08-13 JP JP2001517758A patent/JP2003507933A/en active Pending
- 1999-08-13 AU AU54824/99A patent/AU5482499A/en not_active Abandoned
- 1999-08-13 EP EP99941106A patent/EP1121786A4/en not_active Withdrawn
- 1999-08-13 WO PCT/US1999/018401 patent/WO2001013586A1/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5666357A (en) * | 1995-03-23 | 1997-09-09 | Hughes Electronics | DTMF tone passer in a voice communication system |
Non-Patent Citations (1)
Title |
---|
See also references of WO0113586A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU5482499A (en) | 2001-03-13 |
JP2003507933A (en) | 2003-02-25 |
EP1121786A4 (en) | 2007-05-30 |
WO2001013586A1 (en) | 2001-02-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20010412 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL PAYMENT 20010412;LT PAYMENT 20010412;LV PAYMENT 20010412;MK PAYMENT 20010514;RO PAYMENT 20010412;SI PAYMENT 20010412 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SU, QIN Inventor name: PATEL, PIYUSH Inventor name: MLADENOVIC, ZORAN Inventor name: MORGAN, EDWARD |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20070427 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H04L 12/64 20060101ALI20070423BHEP Ipc: G05B 23/02 20060101ALI20070423BHEP Ipc: H04J 3/12 20060101ALI20070423BHEP Ipc: H04L 12/54 20060101AFI20010227BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20070301 |