FIELD: optic communications.
SUBSTANCE: method includes receiving optical signal from fiber-optic communications line, detecting these, comparing current values of signal in digital form to control value of signal, being one of previous signal values and alert signal is generated, in case of unsanctioned access deviations of previous signal values with consideration of sign are summed on basis of support value, being one of previous signal values, total deviation value in recording device is recorded, current total value of signal deviations is compared to recorded threshold value, alert signal is generated also in case when current total value of threshold value deviations is reached.
EFFECT: possible detection of unsanctioned access to fiber-optic communications line.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DETECTION OF RADIATION COUPLING FROM LATERAL SURFACE OF OPTICAL FIBRE | 2006 |
|
RU2350018C2 |
| METHOD OF PROBABILITY DETECTION INCREASE OF RADIATION COUPLING FROM OPTICAL FIBER | 2006 |
|
RU2349039C2 |
| METHOD OF ELIMINATION OF FALSE OPERATIONS AT SWITCHING ON PROTECTED FIBER-OPTICAL SYSTEMS | 2006 |
|
RU2350019C2 |
| METHOD FOR DETECTING ACCESS TO OPTICAL SIGNAL DURING TRANSMISSION ALONG FIBER-OPTIC LINES | 2005 |
|
RU2301497C1 |
| METHOD OF CONTINUOUS CONTROL OF OPTICAL FIBER DISORDERS | 2012 |
|
RU2575303C2 |
| METHOD FOR PROTECTING INFORMATION AGAINST UNAUTHORIZED ACCESS IN FIBER-OPTIC COMMUNICATION LINE | 1989 |
|
RU2234194C2 |
| TRANSCEIVING UNIT OF FIBER-OPTIC DATA TRANSFER SYSTEM | 2003 |
|
RU2239286C1 |
| DEVICE FOR MONITORING POWER TRANSMITTED THROUGH FIBER-OPTICAL COMMUNICATION LINES | 1999 |
|
RU2152133C1 |
| TRANSCEIVING DEVICE FOR LIMITED-ACCESS PROTECTED FIBER-OPTIC DATA TRANSFER SYSTEM | 2005 |
|
RU2297102C1 |
| FIBRE-OPTIC TRANSMISSION SYSTEM FOR EMERGENCY SITUATIONS | 2007 |
|
RU2362270C2 |
