US5627833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital added main line system with power-up and power-down features
Assignee: Tyco International Ltd Bermuda
•
Filing: 1995-11-03
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Granted: 1997-05-06
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Expires: 2015-11-03
Abstract
Abstract A method for powering a system for transmitting and receiving multiple telephone transmission signals over a single twisted pair. The method also powers down a portion of the system. An analog signal from a local switching station is converted to an 80 kbits/sec signal for transmission over a twisted pair. A remote terminal converts the 80 kbits/sec signal back into a conventional analog signal for use in conventional telephone, facsimile or other related equipment.
Inventors
- 👤 David C. Bliven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:53
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/18; H04M; H04M11/00; H04M11/06; H04M11/068; H04Q11/0435; H04Q11/0471; H04Q2213/00; H04Q2213/034; H04Q2213/09; H04Q2213/099; H04Q2213/13034; H04Q2213/1305; H04Q2213/1308; H04Q2213/13106; H04Q2213/13174; H04Q2213/1319; H04Q2213/13199; H04Q2213/13204; H04Q2213/13208; H04Q2213/13209; H04Q2213/13216; H04Q2213/13292; H04Q2213/13297; H04Q2213/1332; H04Q2213/13322; H04Q2213/13367; H04Q2213/18; H04Q2213/204
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
167 words
A method for powering a system providing multiple telephone line service over a single twisted pair, said method comprising: installing the system, the system including master equipment at a first location coupled through said single twisted pair to a remote terminal at a second location, the system using signals from the group consisting of 2B1Q and 4B3T to provide multiple telephone line service over the single twisted pair; receiving power from telephone company equipment at the first location; using the power for master equipment operation; transmitting the power across said single twisted pair to the second location; using the power for remote equipment operation; and powering down a portion of the remote terminal when: the system is not in a ring stop mode, and a ring request is made, and a line is off-hook; or the system is not in a ring stop mode, and a ring request is not made, and the line is not in a ring active mode, and the line is not off-hook.
Claim 2
Independent Claim
167 words
A method for powering a system providing multiple telephone line service over a single twisted pair, said method comprising: installing the system, the system including master equipment at a first location coupled through said single twisted pair to a remote terminal at a second location, the system using signals from the group consisting of 2B1Q and 4B3T to provide multiple telephone line service over the single twisted pair; receiving power from telephone company equipment at the first location; using the power for master equipment operation; transmitting the power across said single twisted pair to the second location; using the power for remote equipment operation; and powering down a portion of the remote terminal when: the system is not in a ring stop mode, and a ring request is made, and a line is off-hook; or the system is not in a ring stop mode, and a ring request is not made, and the line is not in a ring active mode, and the line is not off-hook.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said system maintains line power within prescribed limits.
Claim 4
Dependent Claim
22 words
The method of claim 2 wherein said prescribed limits comprise TR-TSY-000057 standard AII in standby mode and AAIII during active line use.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein said single twisted pair has a length of at least 15,000 feet.
Claim 6
Dependent Claim
17 words
The method of claim 3 wherein said telephone company equipment comprises a local switch or central office.
Claim 7
Dependent Claim
17 words
The method of claim 5 wherein the portion of the remote terminal converts between analog and digital.
Claim 8
Dependent Claim
15 words
The method of claim 5 wherein the portion of the remote terminal comprises a SICOFI.
Claim 9
Dependent Claim
19 words
The method of claim 3 wherein the power is provided from a 48-volt power supply from a local switch.
Claim 10
Dependent Claim
50 words
The method of claim 1 further comprising the step of powering up the portion of the remote terminal when: the system is not in a ring stop mode, and the ring request is not made, and the line is not in a ring active mode, and a line is off-hook.
Claim 11
Dependent Claim
18 words
The method of claim 9 wherein said single twisted pair has a length of at least 20,000 feet.
Claim 12
Dependent Claim
22 words
The method of claim 1 wherein another portion of the remote terminal serves to increase power available for utilization by subscriber equipment.
Claim 13
Dependent Claim
14 words
The method of claim 11 wherein said another portion comprises subscriber line interface circuits.
Claim 14
Dependent Claim
22 words
The method of claim 12 wherein the remote terminal utilizes CMOS-based devices so as to reduce power consumption in the remote terminal.
Claim 15
Dependent Claim
11 words
The method of claim 11 wherein the subscriber equipment comprises telephones.
Claim 16
Dependent Claim
14 words
The method of claim 14 wherein the second location comprises a home or office.
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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) | 2000-05-05 | 2000-11-04 | 2001-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-05 | 2004-11-04 | 2005-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-05 | 2008-11-04 | 2009-05-06 | $7700.00 | Window Closed / Lapsed |