Add T3 Technology T723 router/ONT

[tobiaspal]

Thank you for maintaining this very useful collection of GPON information.

I have a T3 Technology T723 ONT/router supplied by TrueOnline in Thailand. I could not find an existing page for this model, so I collected the hardware and software details that I could verify directly on the device and added it to the Router PON section.

Included information

• dual-core ARM Cortex-A9 / HiSilicon platform, RAM and SPI-NAND capacity;
• Ethernet, voice, web, Telnet and vendor SSH/WAP CLI capabilities;
• tested firmware, hardware, U-Boot and Linux versions;
• kernel-exposed flash layout and A/B allsystem images;
• read-only CLI commands for checking firmware, GPON O5 state and local PPP clients;
• observed bridge-mode behaviour with a downstream router on the 2.5GbE port;
• Huawei configuration-export and inline $2...$ encryption formats, with links to existing open-source tools.

All values are from a TrueOnline unit with hardware revision 4EF8.D and firmware V5R025C00S126. The page marks operator-specific behaviour accordingly.

Validation

• parsed and cross-checked the new Jekyll front matter and parent relationship;
• ran npm ci --ignore-scripts and npm run build successfully;
• ran git diff --check;
• scanned the new files for device identifiers and credentials.