| 摘要 |
PROBLEM TO BE SOLVED: To provide a level 2 processing multiplexer and a level 2 multiplexing method capable of increasing a multiple number of a level 2 processing inaptitude for multiplexing while preventing deterioration in the firmware processing capability. SOLUTION: The level 2 processing of the No.7 signal system is configured to be implemented by a protocol processing section applying protocol processing to a signal unit (SU) and a signal unit processing section that processes the signal unit received from the protocol processing section in a form of a frame multiplexed signal and uses sequence number (SN) of the signal unit to autonomously and periodically generate a fill-in signal unit (FISU) by means of hardware so as to realize multiplexing by reducing the firmware processing. A link state signal unit (LSSU) and a meaningful signal unit (MSU) of the level 2 processing multiplexer are provided with a parity error detection function, and on the occurrence of a fault, the firmware processing can be reduced with an added function of transmitting a transmission signal whose error check code is brought into a virtual fault allows an opposite station to be able to abort erroneous data by error check/synchronization control.
|
