Patent
Aps channel fetching circuit
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TLDR
In this article, the change point detecting circuit detects the change of bytes K1 and K2 to generate a change point detection signal and a signal corresponding to bytes k1 and k2.Abstract:
PURPOSE:To prevent the erroneous switching operation at the time of the generation and restoration of MS-AIS in the MSP protocol processing of bidirectional line protection of a device coping with SDH. CONSTITUTION:Bytes K1 and K2 as the APS channel and a timing' signal are inputted to a change point detecting circuit 4. The change point detecting circuit detects the change of bytes K1 and K2 to generate a change point detection signal and a signal corresponding to bytes k1 and k2. An alarm detecting circuit 1 detects a signal indicating the detection of alarm included in an input byte signal to generate an alarm detection signal. A protection circuit 2 generates a protection signal in accordance with the alarm detection signal and a sampling signal. A control circuit 3 generates a control signal in accordance with the alarm detection signal and the protection signal. The change point detecting circuit 4 delays generation of the change point detection signal in accordance with the control signal.read more
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Patent
Method and device for inverting mode match verifying of protected field both extremities protecting group
TL;DR: In this paper, one inverse mode matching test method of protection set, which comprises the following steps: a, two ends of protection area send inverse automatic protection signal with local end protection set to partner end; b, local end receives APS signal for analysis and to judge whether the part end protection sets inverse mode and local-end protection end type to generate alarm indication.
Patent
Method for implementing cross-cable card msp, main control chip, and ptn device
Tingshan Pan,潘庭山 +1 more
TL;DR: In this article, the main control chip configures a designated port of the first STM cable card to form an MSP group, and establishes corresponding relationship between the first and second cascade ports and the MSP groups; after receiving services in an upstream direction, if it is identified that the services are from designated ports, the main controller chip choosing to receive and forward the service from one of the designated ports according to the state of the mSP group.