STS-1 signal processing method and device which can prevent subs

Details STS-1 signal processing method and device which can prevent subs STS-1 signal processing method and device which can prevent subs

1992-09-21

1994-03-29

Kuntz, Curtis

Pulse or digital communications

Spread spectrum

Direct sequence

370102, H04L 700

Patent

active

052992349

ABSTRACT:
In a processing device for processing an STS-1 signal (10) into a DS-3 signal (11), an output circuit (19) outputs an idle code signal when a judging circuit (16) judges that a detected STS path signal label part indicates that an STS synchronous payload envelope of the STS-1 signal is unequipped or unused. The idle code signal represents an idle code prescribed for the DS-3 signal and is generated by a generator (18). The detected STS path signal label part is produced by a detecting circuit (12, 15) which detects an STS path signal label part from STS path overheads of successive subframes of the STS synchronous payload envelope. The judging circuit judges whether or not the detected STS path signal label part indicates that the STS synchronous payload envelope is unequipped. An extracting circuit (17) successively extracts information parts of payloads of the subframes of the STS synchronous payload envelope from the STS-1 signal as a succession of extracted information parts. The output circuit outputs the succession of the extracted information parts as the DS-3 signal when the judging circuit judges that the detected STS path signal label part indicates that the STS synchronous payload envelope is not unequipped. On processing a VT into a DS-1 signal, use is made of another idle code prescribed for the DS-1 signal.

REFERENCES:
patent: 5030951 (1991-07-01), Edo et al.
patent: 5111485 (1992-05-01), Serack
patent: 5157655 (1992-10-01), Hamlin, Jr. et al.
patent: 5235332 (1993-08-01), Stephenson, Jr.
American National Standard for Telecommunications-Digital Hierarchy-Optical Interface Rates and Specifications (SONET)T1X1.5/90-025R3/T1X1/90-055R2, Draft-Nov. 1990; Published by American National Standards Institute, Inc.

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