Communications: electrical – Continuously variable indicating – With meter reading
Patent
1989-05-01
1993-05-18
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
370 13, 370 16, H04B 100
Patent
active
052124754
ABSTRACT:
A method for generating an alarm inhibit signal. A modified AIS-Signal in the form of long strings of ones signal with the addition of an identification character is provided. This identification character can be individual zeros that are periodically introduced with a frequency of less than 10.sup.-3 or can be an auxiliary signal. When a digital signal distributor receives a standardized AIS-Signal or when it recognizes some other deficiency, it supplies a modified AIS-Signal to an outgoing path. Only the following digital signal distributors recognize the modification, in turn supply such a modified AIS-Signal and forego a message to a regional center. On the basis of the message of the digital signal distributor, a network management center switches to a backup path. The present invention is used in centrally controlled network protection switching systems.
REFERENCES:
patent: 3991278 (1976-11-01), Fang et al.
patent: 4685101 (1987-08-01), Segal et al.
patent: 4797875 (1989-01-01), Pospischil et al.
CCITT Draft Recommendation G.70z, p. 1 and p. 21.
CCITT, Digital Networks, Transmission Systems and Multiplexing Equipment, Recommendations G.701-G.941, 1980, p. 15 and p. 65.
"More Efficiency Through Computer-Aided Network Management" telcom report, English Edition, 10 (1987) No. 5 pp. 260-265.
"Recovery from Transmission Medium Failures in a Ring" by Andrews et al., Jul. 1983, IBM Technical Disclosure Bulletin, vol. 26, No. 2, pp. 803-804.
CCITT Draft Recommendation, COM XVIII-Report R25 (C)-E Aug. 1986, pp. 1-61.
Magistre Dervis
Siemens Aktiengesellschaft
Yusko Donald J.
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