US5636218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gateway system that relays data via a PBX to a computer connected to a pots and a computer connected to an extension telephone and a lanand a method for controlling same
Assignee: International Business Machines Corp
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Filing: 1995-10-17
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Granted: 1997-06-03
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Expires: 2015-10-17
Abstract
Abstract Disclosed is a gateway system and method for controlling same which allows a video conference to be held with a participant (node) being on a plain old telephone system by using a conventional private telephone system and a LAN. The gateway system relays data, via a private branch exchange, to an information processing unit that is on an external plain old telephone system, and an information processing unit that is connected to an extension telephone and a LAN. The system includes a modem for receiving a call from, or transmitting a call to, the plain old telephone system, and for modulating and demodulating a signal. A multiplexer/demultiplexer is used to multiplex voice information and computer data to prepare a packet, or demultiplex a packet to acquire voice data and computer data separately. A LAN adaptor is used for transmitting and receiving computer data via the LAN. A dialer is provided for making a call to an extension telephone and a digital signal processor is used for coding and decoding voice data. An AD/DA converter is provided for performing analog-to-digital or digital-to-analog conversion on the voice data.
Inventors
- 👤 Katsuya Ishikawa
- 👤 Seita Iida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:07
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/46; H04L12/02; H04L12/16; H04L12/18; H04L12/1813; H04L12/1822; H04L9/00; H04L9/40; H04M; H04M3/00; H04M3/42; H04M3/56; H04M3/567; H04N; H04N7/00; H04N7/14; H04N7/141; H04N7/148; H04N7/15
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A gateway system, which relays data, via a private branch exchange, to an outside information processing unit on a plain old telephone system and to an information processing unit that is connected to an internal extension telephone system and a LAN, comprising: a modem for demodulating a packet that is received via said plain old telephone system and for modulating and transmitting a packet to said plain old telephone system, and for dialing an outside telephone line; multiplex/demultiplex means for multiplexing voice data and computer data to form a packet, and for demultiplexing a packet to acquire voice data and computer data separately; signal processing means for coding or decoding said voice data; AD/DA conversion means for performing digital-analog or analog-digital conversion on said voice data; dial means for dialing an extension line via said private branch exchange; and a LAN adaptor for exchanging computer data via said LAN.
Claim 2
Dependent Claim
149 words
A gateway system, which relays data, via a private branch exchange, to an outside information processing unit on a plain old telephone system and to an information processing unit that is connected to an internal extension telephone system and a LAN, comprising: a modem for demodulating a packet that is received via said plain old telephone system and for modulating and transmitting a packet to said plain old telephone system, and for dialing an outside telephone line; multiplex/demultiplex means for multiplexing voice data and computer data to form a packet, and for demultiplexing a packet to acquire voice data and computer data separately; signal processing means for coding or decoding said voice data; AD/DA conversion means for performing digital-analog or analog-digital conversion on said voice data; dial means for dialing an extension line via said private branch exchange; and a LAN adaptor for exchanging computer data via said LAN.
Claim 3
Independent Claim
143 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit that is connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit that is connected internally to an extension telephone system and a LAN, comprising the steps of: receiving a call from said node A to said gateway system; transmitting from said node A to said gateway system a packet that includes identification information for said node B; acquiring, by said gateway system, an extension telephone number for said node B according to said identification information; dialing of an extension telephone number for said node B by said gateway system; and establishing a LAN connection between said gateway system and said node B.
Claim 4
Independent Claim
143 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit that is connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit that is connected internally to an extension telephone system and a LAN, comprising the steps of: receiving a call from said node A to said gateway system; transmitting from said node A to said gateway system a packet that includes identification information for said node B; acquiring, by said gateway system, an extension telephone number for said node B according to said identification information; dialing of an extension telephone number for said node B by said gateway system; and establishing a LAN connection between said gateway system and said node B.
Claim 5
Independent Claim
130 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit that is connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit that is connected internally to an extension telephone system and a LAN, comprising the steps of: establishing a LAN connection between said node B and said gateway system; transmitting, via LAN, from said node B to said gateway system a packet that includes a telephone number for said node A; dialing, by said gateway system, of said telephone number of said node A; and dialing of an extension telephone number for said node B by said gateway system.
Claim 6
Independent Claim
130 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit that is connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit that is connected internally to an extension telephone system and a LAN, comprising the steps of: establishing a LAN connection between said node B and said gateway system; transmitting, via LAN, from said node B to said gateway system a packet that includes a telephone number for said node A; dialing, by said gateway system, of said telephone number of said node A; and dialing of an extension telephone number for said node B by said gateway system.
Claim 7
Independent Claim
147 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit that is connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit that is connected internally to an extension telephone system and a LAN, comprising the steps of: receiving, via said private branch exchange, a packet that is transmitted to said plain old telephone system by said first information processing unit; demodulating said packet; demultiplexing the resultant packet to acquire voice data and computer data separately; decoding and converting said voice data into an analog signal; transmitting said analog signal via said private branch exchange to an extension telephone for said node B; and transmitting said computer data to said second information processing unit that is LAN-connected.
Claim 8
Independent Claim
147 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit that is connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit that is connected internally to an extension telephone system and a LAN, comprising the steps of: receiving, via said private branch exchange, a packet that is transmitted to said plain old telephone system by said first information processing unit; demodulating said packet; demultiplexing the resultant packet to acquire voice data and computer data separately; decoding and converting said voice data into an analog signal; transmitting said analog signal via said private branch exchange to an extension telephone for said node B; and transmitting said computer data to said second information processing unit that is LAN-connected.
Claim 9
Independent Claim
130 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit connected internally to an extension telephone system and a LAN, comprises the steps of: receiving voice data via said private branch exchange from an extension telephone for said node B; digitizing and coding said voice data; receiving computer data via a LAN from said second information processing unit; multiplexing said voice data that are coded and said computer data to prepare a packet; and modulating and transmitting said packet via said private branch exchange to said first information processing unit.
Claim 10
Independent Claim
130 words
A method for controlling a gateway system that relays data, via a private branch exchange, to a node A, to which is allocated a first information processing unit connected externally to a plain old telephone system, and to a node B, to which is allocated a second information processing unit connected internally to an extension telephone system and a LAN, comprises the steps of: receiving voice data via said private branch exchange from an extension telephone for said node B; digitizing and coding said voice data; receiving computer data via a LAN from said second information processing unit; multiplexing said voice data that are coded and said computer data to prepare a packet; and modulating and transmitting said packet via said private branch exchange to said first information processing unit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |