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Global DS model

VTO6521-S2

Global DS lists 1 firmware file for the VTO6521-S2. This is the retail model name. Inside the firmware, Dahua uses its own device IDs, listed below, which can lead you to more compatible firmware.

Firmware files
1
Newest
Nov 22, 2024
Listed by
Global DS
Dahua device IDs
9

Vendor notes

Firmware

Dahua device IDs in this firmware

Compare these with the updateSerial your device reports. Each one links to every firmware found for that ID.