Retail model
VTH1550CH-S2
Cifra and Dahua and Global DS and Viatec lists 7 firmware files for the VTH1550CH-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
- 7
- Newest
- Oct 7, 2026
- Listed by
- Cifra, Dahua, Global DS, Viatec
- Dahua device IDs
- 4
Vendor notes
- Folder: VDP/SIP2.0-FW/VTH1550CH-S2
- Folder: VDP - IP video kaputelefonok/SIP 2.0 (V4.4) A régi VT-s eszközökhöz NEM használható!!!!/VTH - Beltéri monitorok/VTH1550CH-S2 +HUN
Firmware
- DH_VTHX421L_MultiLang_SIP_V4.510.0000000.2.R.260716.zipDownload
Released Oct 7, 2026 · V4.510.0000000.2.R · 4 devices · Dahua
- DH_VTHX421L_MultiLang_SIP_V4.510.0000000.1.R.230509.zipDownload
Released Jun 28, 2023 · V4.510.0000000.1.R · 4 devices · Dahua
- DH_VTHX421L_MultiLang_SIP_V4.510.0000000.0.R.220314.binDownload
Released Mar 14, 2022 · V4.510.0000000.0.R · 4 devices · Viatec
- General_VTHX421L-data_MultiLang_Magyar nyelv_P_SIP_PART_V4.410.0000001.0.R.20200901.binDownload
Released Sep 1, 2020 · V4.410.0000001.0.R · 4 devices · Global DS
- Customer_VTHX421L_MultiLang_SIP_V4.410.10IM001.0.R.20200826.binDownload
Released Aug 26, 2020 · V4.410.10IM001.0.R · 4 devices · Viatec
- DH_VTHX421L_MultiLang_SIP_V4.410.0000000.4.R.20200221.binDownload
Released Feb 21, 2020 · V4.410.0000000.4.R · 4 devices · Cifra, Dahua
- General_VTHX421L_MultiLang_SIP_V4.410.0000000.4.R.20200221.binDownload
Released Feb 21, 2020 · V4.410.0000000.4.R · 4 devices · ASM, Dahua, Global DS
Dahua device IDs in this firmware
Compare these with the updateSerial your device reports. Each one links to every firmware found for that ID.