Patent US4864612A successfully refreshed from Google Patents.
US4864612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of avoiding accidental actuation of maintenance equipment in a communications network
Assignee: Nokia Bell Labs
•
Filing: 1987-10-23
•
Granted: 1989-09-05
•
Expires: 2007-10-23
Abstract
Abstract A technique for avoiding accidental actuation of communications system devices which respond to a predetermined pattern of signals. In accordance with the present invention, data to be transmitted through the communications system is scrambled so as to reduce the likelihood of the customer data mimicking the predetermined pattern of signals. At the receiving end, the scrambled customer data is descrambled to its original condition.
Inventors
- 👤 Om P. Mahajan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:42
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/03; H04L25/03828; H04L25/03866
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A method for increasing the information-carrying capacity of a communications network in which customer-generated data is transmitted in a first time period and test and maintenance signals which automatically actuate equipment in the network is transmitted in a second time period, the equipment actuation being incompatible with the transmission of customer-generated data, said method comprising the steps of scrambling the customer-generated data so as to reduce the likelihood of said data mimicking said test and maintenance signals, and transmitting said scrambled customer-generated data in said network during said first and second time periods, whereby said method reallocates the use of said second time period from maintenance and test signals to customer-generated data.
Claim 2
Independent Claim
112 words
A method for increasing the information-carrying capacity of a communications network in which customer-generated data is transmitted in a first time period and test and maintenance signals which automatically actuate equipment in the network is transmitted in a second time period, the equipment actuation being incompatible with the transmission of customer-generated data, said method comprising the steps of scrambling the customer-generated data so as to reduce the likelihood of said data mimicking said test and maintenance signals, and transmitting said scrambled customer-generated data in said network during said first and second time periods, whereby said method reallocates the use of said second time period from maintenance and test signals to customer-generated data.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said customer data is a digital signal.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein said customer data has a data rate of 64 kilobits/second.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said customer data is an analog signal.
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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |