The invention discloses a digital
optical fiber repeater with a
backup and a switching method. The
repeater mainly comprises a
local machine and at least one
remote machine, the plurality of main optical modules of the
local machine are connected with the main optical modules of the corresponding remote machines, and the multiple optical modules of the
local machine are connected with the standbyoptical modules of the corresponding remote machines, and each
remote machine is connected in sequence. The local
machine is mainly composed of a local main control board, a local intermediate-frequency board, and a local power supply module, and the
remote machine is composed of a remote main control board, a remote intermediate-frequency board, a
remote power supply module, and a power amplifiermodule. According to the digital
fiber repeater system with
backup and switching method, the local intermediate-frequency board, the remote intermediate-frequency board and the power
amplifier moduleare stripped from the main control board by adopting a
modular design, various modules are added or removed according to the use requirement; The instantaneous switching is realized through the hardware and the
software in the
system, and the user experience is basically not affected; meanwhile, the equipment cost is reduced, the design scheme is simplified, and the
system reliability is improved.