US5319640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitting/receiving system having digital switching network
Assignee: Xylon LLC
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Filing: 1993-02-10
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Granted: 1994-06-07
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Expires: 2013-02-10
Abstract
Abstract Transmitting/receiving system includes a plurality of analog junction lines and analog tie trunks provided at two ends of the analog junction lines. The PBX is provided with an analog junction line-ISDN converting unit. The analog junction line-ISDN converting unit is operative to transfer B-channel signals on a first analog junction line through the PBX network and the analog tie trunks and to transfer D-channel signals on a second analog junction line.
Inventors
- 👤 Hiroshi Yamasaki
- 👤 Yuji Maeda
- 👤 Shigehiko Yazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:03
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0435; H04Q11/0464
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
152 words
A transmitting/receiving system having a digital switching network connected to a plurality of analog junction lines, the system comprising: a plurality of analog tie trunks connected to the digital switching network and the analog junction lines; analog tie line ISDN converting means including means for separating a B channel signal and a D channel signal of an ISDN signal given from said digital switching network from each other, first means for transmitting the separated D channel signal through a first analog junction line, means for interfacing the separated B channel signal with the digital switching network, and second means for transmitting the separated B channel interface with the digital switching network through a second analog junction line; and control means for controlling said digital switching network to connect a corresponding analog tie trunk to said interfacing means so as to transmit the separated B channel signal through said second analog junction line.
Claim 2
Dependent Claim
152 words
A transmitting/receiving system having a digital switching network connected to a plurality of analog junction lines, the system comprising: a plurality of analog tie trunks connected to the digital switching network and the analog junction lines; analog tie line ISDN converting means including means for separating a B channel signal and a D channel signal of an ISDN signal given from said digital switching network from each other, first means for transmitting the separated D channel signal through a first analog junction line, means for interfacing the separated B channel signal with the digital switching network, and second means for transmitting the separated B channel interface with the digital switching network through a second analog junction line; and control means for controlling said digital switching network to connect a corresponding analog tie trunk to said interfacing means so as to transmit the separated B channel signal through said second analog junction line.
Claim 3
Dependent Claim
95 words
Transmitting/receiving system as set forth in claim 1, wherein said analog tie line ISDN converting means includes an ISDN tie trunk and a digital trunk, said digital trunk being connected between said network and said ISDN tie trunk and controlling transmission and reception of said B-channel signal transferred on said second analog junction line through a corresponding analog tie trunk, said ISDN tie trunk controlling the transmission and reception of said B-channel signal with said digital trunk and also controlling the transmission and reception of said D-channel signal transferred on said first analog junction line.
Claim 4
Dependent Claim
47 words
Transmitting/receiving system as set forth in claim 2, wherein said separating means of said converting means includes a primary rate interface unit including a network interface and a line control processor which transfers call control data through said network interface with a call processor controlling said network.
Claim 5
Dependent Claim
46 words
Transmitting/receiving system as set forth in claim 3, wherein said analog tie line ISDN converting means further includes a modem, said modem being connected to said ISDN tie trunk and controlling the transmission and reception of said D-channel signal transferred on said first analog junction line.
Claim 6
Dependent Claim
34 words
Transmitting/receiving system as set forth in claim 4, wherein said ISDN tie trunk includes a B-channel signal digital trunk interface and a D-channel modem interface, inserted between said network interface and said modem, respectively.
Claim 7
Dependent Claim
39 words
Transmitting/receiving system as set forth in claim 5, wherein said ISDN tie trunk includes a B-channel controller inserted between said network interface and said digital trunk and a D-channel controller inserted between said network interface and said modem interface.
Claim 8
Dependent Claim
66 words
Transmitting/receiving system as set forth in 6, wherein the system has a peripheral for the line control processor which is provided in said network interface and which is connected with said D-channel controller and wherein the line control processor, the D-channel controller, the B-channel controller, the digital trunk interface, and the modem interface are controlled all together through a common bus under said line control processor.
Claim 9
Dependent Claim
66 words
Transmitting/receiving system as set forth in 6, wherein the system has a peripheral for the line control processor which is provided in said network interface and which is connected with said D-channel controller and wherein the line control processor, the D-channel controller, the B-channel controller, the digital trunk interface, and the modem interface are controlled all together through a common bus under said line control processor.
Claim 10
Dependent Claim
52 words
Transmitting/receiving system as set forth in claim 7, wherein said digital trunk interface operates so as to disregard each time slot allocated for a D-channel among time slots in communication frames when processing a series of communication frames composing an ISDN signal sent and received between two mutually communicating ISDN terminal equipments.
Claim 11
Dependent Claim
21 words
Transmitting/receiving system as set forth in claim 6, wherein said D-channel controller generates HDLC transmission data and terminates HDLC reception data.
Claim 12
Dependent Claim
41 words
Transmitting/receiving system as set forth in claim 6, wherein said B-channel controller is comprised of an elastic buffer memory which buffers a difference between a signal processing speed in a PBX and a signal transmission speed on the analog junction line.
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) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |