This article applies to industrial devices using the VxWorks operating system. The POST mode on SIP phones works like the BIOS on a computer, and the firmware is similar to the computer's operating system. If a computer crashes, you can reinstall the OS. Similarly, if a phone fails to boot normally, you can use POST mode to upgrade and restore the system.
BHP-SOS12, BHP-SOS12V, BHP-SOS18, Bi20S, Bi30S, Bi31S, Bi23S, Bi32V, Bi33V, BK-ROIP-PA2.
Download the latest firmware for your device from: https://www.fanvil.com/Support/download.html If you are unsure which firmware to use or have a customized version, contact technical support.
Note: The firmware file MUST be in .z format. This is NOT a zip file and MUST NOT be unzipped.
FTP Tool: We use wftpd32 (other FTP software is also supported). Download wftpd32: http://download.fanvil.com/HowTo/UpdateInPostMode/wftpd32.rar Run wftpd32 on your PC.





WARNING: DO NOT close the FTP server during the POST upgrade.

Method 1: PC Directly Connected to WAN Port
Method 2: Same Local Network


Note: If Telnet is not enabled, install it via Windows Features or use tools like PuTTY/SecureCRT.

Note: Use only .z files. Show file extensions if needed.

Note: If upgrade fails, disable PC firewall and retry.
After successful upgrade:
After reboot, log into the web UI to verify firmware version and normal operation. Upgrade is complete.