ALARM INHIBITION INFORMATION TRANSFER METHOD FOR HIGH SPEED DIGITAL LEASED LINE SERVICE, HIGH SPEED DIGITAL LEASED LINE SERVICE SYSTEM AND SDH SYSTEM TRANSMISSION EQUIPMENT TO BE USED THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide an alarm inhibition information transfer method for high speed digital leased line service, a high speed digital leased line service system and synchronous digital hierarchy(SDH) system transmission equipment to be used therefor with which improvement in the efficiency of using a line between SDH system transmission equipment and the prevention of useless alarm generation can be made compatible. ;SOLUTION: SDH system transmission equipment 11 always establishes the multi- frame synchronism of 1.5M path sent from a DSU 4. When the equipment 11 detects that RINH generated by the DSU 4 has been assigned to 6M frames and sent out of the DSU 4 while the power source of the DSU 4 is turned off, the equipment 11 sends out alarm inhibition information based on the RINH by inserting the information to a previously assigned auxiliary bit in the 1.5 multi-frame which the equipment 11 generates. When the alarm inhibition information is detected out of this 1.5 multi- frame, the SDH system transmission equipment 12 generates 6M frames inserted to the bit, to which RINH is previously assigned, and transfers it to terminal station equipment 5.;COPYRIGHT: (C)2000,JPO