1. Introduction

 This document is the release note for Firmware V13.511B03, released November 2025. 
 The previous version was V13.506R02, released on June 2025.
 The camera model may be correctly reported as TCB-4236F or ANT-ZB1300


2. Enhancements/Improvements

 2.1 Added Batch Firmware Upgrade Function
  Allows simultaneous upgrade of AF Micom FW, Mecha FW, and IP FW using a single TUS file.
 2.2 Added TUS File Integrity Verification
  Added a feature to prevent system boot failure in advance through file verification.
 2.3 Enhanced ONVIF Protocol User Authority Handling
  Improved handling of user permissions via the ONVIF protocol.
 2.4 Updated Media Streaming Library
  Updated media streaming components (e.g., RTSP) to the latest version.
 2.5 Revision Compatibility
  Firmware now supports revision boards reflecting surge protection enhancements and discontinued component replacements.


3. Changes

 3.1 Improved X36 White Balance
  Enhanced white balance, colour reproduction, and light diffusion for the IMX385 x36 model.
 3.2 Improved 4K x4 Image Quality - model dependant
  Improved day and night image quality for the IMX678 x4 model.


4. Bug Fixes

 4.1 Fixed video stuttering issue in Web Viewer across all models.
 4.2 Resolved issue where highest resolution encoding was not possible in CWand CCW modes.
 4.3 Fixed issue where "Digital Zoom" and "File Record" functions were disable don the Web Live page when 'H.265' was selected.
 4.4 Added system auto-reboot using the watchdog when encoding fails for a certain period.