US5757889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voice monitoring method for a telephone switching equipment
Assignee: NEC Corp
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Filing: 1996-01-03
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Granted: 1998-05-26
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Expires: 2016-01-03
Abstract
Abstract A voice monitoring method which is capable of preventing an occurrence of the interruption of a call and reducing the burden of switching software, and also capable of monitoring the contents of a call whose communication path is performed within the same line switch installed in a remote place is provided. A voice from a monitored subscriber telephone set 6-1 is distributed at a line switch 4-1 to a voice monitor path (unidirectional path) 8-1, and a voice from a subscriber telephone set 6-2 of the other party is distributed at the line switch 4-1 to a voice monitor path (unidirectional path) 8-2. The distributed voices are given through a time-division switch 3 to the first and second terminals of a three-way trunk 5, are mixed at the three-way trunk 5, and are sent through the third terminal to a monitor telephone set 7.
Inventors
- 👤 Kiyomi Ohtake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:51
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/22; H04M3/2272; H04M3/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A voice monitoring method for a telephone switching equipment including a time-division switch for establishing communication paths, a plurality of line switches being connected to the time-division switch for connecting and concentrating a plurality of subscriber telephone sets, and at least one three-way trunk being connected to the time-division switch for providing three-way communication paths, said method comprising steps of: distributing a voice from a monitored subscriber telephone set and a voice to said monitored subscriber telephone set at said line switch; giving both the distributed voices through said time-division switch to first and second terminals of said three-way trunk for mixing said distributed voices; and giving said mixed voices from a third terminal of said three-way trunk to a monitoring telephone set through said time-division switch.
Claim 2
Dependent Claim
127 words
A voice monitoring method for a telephone switching equipment including a time-division switch for establishing communication paths, a plurality of line switches being connected to the time-division switch for connecting and concentrating a plurality of subscriber telephone sets, and at least one three-way trunk being connected to the time-division switch for providing three-way communication paths, said method comprising steps of: distributing a voice from a monitored subscriber telephone set and a voice to said monitored subscriber telephone set at said line switch; giving both the distributed voices through said time-division switch to first and second terminals of said three-way trunk for mixing said distributed voices; and giving said mixed voices from a third terminal of said three-way trunk to a monitoring telephone set through said time-division switch.
Claim 3
Dependent Claim
157 words
A voice monitoring method for a telephone switching equipment including a time-division switch for establishing communication paths, a plurality of line switches being connected to the time-division switch for connecting and concentrating a plurality of subscriber telephone sets, and at least one three-way trunk being connected to the time-division switch for providing three-way communication paths, said method comprising steps of: connecting a first monitoring path having one directional signal transmission characteristics to a signal receiving terminal from a monitored telephone set at a first line switch; connecting another end of said first monitoring path to a first signal receiving terminal of said three-way trunk through said time-division switch; connecting a second monitoring path having one directional signal transmission characteristics to a signal sending terminal to a monitoring telephone set at a second line switch; and connecting another end of said second monitoring path to a third signal sending terminal of said three-way trunk through said time-division switch.
Claim 4
Dependent Claim
157 words
A voice monitoring method for a telephone switching equipment including a time-division switch for establishing communication paths, a plurality of line switches being connected to the time-division switch for connecting and concentrating a plurality of subscriber telephone sets, and at least one three-way trunk being connected to the time-division switch for providing three-way communication paths, said method comprising steps of: connecting a first monitoring path having one directional signal transmission characteristics to a signal receiving terminal from a monitored telephone set at a first line switch; connecting another end of said first monitoring path to a first signal receiving terminal of said three-way trunk through said time-division switch; connecting a second monitoring path having one directional signal transmission characteristics to a signal sending terminal to a monitoring telephone set at a second line switch; and connecting another end of said second monitoring path to a third signal sending terminal of said three-way trunk through said time-division switch.
Claim 5
Dependent Claim
70 words
A voice monitoring method for a telephone switching equipment according to claim 2, further comprising steps of: connecting a third monitoring path having one directional signal transmission characteristics to a signal receiving terminal from a telephone set connected with said monitored telephone set at a first line switch; connecting another end of said first monitoring path to a second signal receiving terminal of said three-way trunk through said time-division switch.
Claim 6
Dependent Claim
30 words
A voice monitoring method for a telephone switching equipment according to claim 3, wherein, said first line switch is remotely located and connected to said time-division switch through transmission equipment.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |