System upgrade method and device

A system upgrade method, comprising:

• sending, by an optical line terminal (OLT), an indication message to an optical network terminal (ONT), wherein the indication message is used to instruct the ONT to perform a concurrent upgrade with the OLT;
• performing, by the OLT, a reset to activate a preloaded OLT upgrade program;
• and
• restoring, by the OLT, a service with the ONT.

An optical network terminal (ONT), comprising:

• a non-transitory computer-readable medium having processor-executable instructions stored thereon for a system upgrade;
• and
• a processor, configured to execute the processor-executable instructions to facilitate:
• detecting an upgrade triggering event, wherein the upgrade triggering event triggers the ONT to perform a concurrent upgrade with an optical line terminal (OLT);
• performing a reset to activate a preloaded ONT upgrade program;
• and
• restoring a service with the OLT.

An optical line terminal (OLT), comprising:

• a non-transitory computer-readable medium having processor-executable instructions stored thereon for a system upgrade;
• and
• a processor, configured to execute the processor-executable instructions to facilitate:
• sending an indication message to an optical network terminal (ONT), wherein the indication message is configured to instruct the ONT to perform a concurrent upgrade with the OLT;
• performing a reset to activate a preloaded OLT upgrade program;
• and
• restoring a service with the ONT.