Huawei Hg8245h Firmware Upgrade [2021]

Because the Huawei HG8245H is an ISP-grade Optical Network Terminal (ONT), finding a useful blog post for a firmware upgrade is tricky. Most ISPs lock the firmware update section, meaning you cannot manually flash the router even if you find the file.

Here is a summary of the most useful information found across technical blogs and forums regarding this specific model, structured as a "blog post" for you. Huawei Hg8245h Firmware Upgrade

B. Current Firmware Version

Log into the web interface:

  1. Connect via Ethernet to LAN1.
  2. Open browser → 192.168.100.1 or 192.168.1.1 (check your gateway).
  3. Username: root or telecomadmin | Password: admin or admintelecom (or your ISP’s password).
  4. Navigate to System Tools > Firmware Upgrade or Device Info. Example output: V300R016C10S115 or V300R017C00S100.

Decoding the firmware string:

  • V300R016 = Version 300, Release 16 (year 2016). Very old.
  • V300R017 = Release 17 (2017).
  • V300R018 or R019 = Newer.

5.3 Change Default Passwords

  • Many HG8245H units come with telecomadmin / admintelecom. Change both the web and Telnet/SSH passwords immediately.

Overview

The HG8245H is an OLT/ONT residential gateway (GPON ONT) used by ISPs. Firmware upgrades can fix bugs, improve performance, or add features, but they can also brick the device or break ISP-specific customizations. Proceed only if you understand the risks and have a recovery method (console access, TFTP server, or ISP support). Because the Huawei HG8245H is an ISP-grade Optical

1. Security Patches

Outdated firmware is a goldmine for hackers. Older versions of the HG8245h firmware had known backdoors (e.g., the infamous "E8C" default root credentials). A firmware upgrade closes these holes, protecting your home network from botnets and unauthorized access. Connect via Ethernet to LAN1

6. Common Issues & Troubleshooting

| Symptom | Possible Cause | Solution | |---------|----------------|----------| | Upgrade fails after 2% | Incorrect firmware for hardware version | Verify board ID (display deviceInfo) | | No web access after upgrade | Factory reset needed | Press reset pinhole for 10+ seconds | | GPON LOS blinking | Firmware mismatch with OLT | Contact ISP – may need custom firmware | | Telnet disabled after upgrade | Newer firmware locks telnet | Use SSH or enable telnet via config file | | Boot loop | Corrupt flash | Use serial console (TTL) to recover via bootloader |

7. Safety Recommendations

  • Never interrupt power during upgrade.
  • Do not upgrade just for “new features” unless fixing a specific issue.
  • Keep backup of configuration (System Tools → Configuration File → Backup).
  • Check ISP lock – Some ISPs use signed firmware; generic firmware may deregister ONT from OLT.
  • Test in lab before deploying to production.