| 摘要 |
PURPOSE: A loop back mode setting method is provided to be easy to verify a system by realizing a loop back mode between a network processor and a data transceiver. CONSTITUTION: A program of sending a signal for driving a loop back function is stored in a programmable logic device(S101). A booting circumstance is established so that the program stored in the programmable logic device is carried out and thus a system is booted(S102,S103). A loop back driving signal is sent to a data transceiver by the program stored in the programmable logic device when the system is booted(S104). Data transferred from the data transceiver to a network processor is fed back to the network processor(S105).
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