The alarm inhibitation information transfer manner in high-speed digital common carrier leased line servicing, high-speed digital common carrier leased line service mode and the SDH mode transmission device null which is used for

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