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Need Guru help please to telnet to VTO2000A / fw issue

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Hi there,

 

I have installed by mistake a wrong Firmware on my VTO2000A.

I usually have FW like "General_Multi3_VTO2000A_EngRusItlFreGetDutSpaPor_P_16M_V3.100.0000.0.R.2017030.bin", but I found on the Dahua Wigi a more recent one : "General_VTOXXX_Eng_P_16M_V3.120.0000.0.R.20180613.bin"

 

... except that I saw too late that it was for VTOXXX and not for VTO2000A, and that it was English.

 

So I was able to install that F and it is running except some things, but I want to come to the previous version of the FW and it is not working (tried Config tool old version, port 3800 is not allowed anymore, std port 37777 fails to upgrade the FW, tried VDPconfig, same thing, tried config tool 4.09, also not working)

 

I saw somewhere that "Sonia", which is something part of the wrong FW I installed, could have killed some upgrade processes ?

 

I wanted to Telnet to the system but even allowing telnet (with the URL syntax I saw), I got an "OK" but then using putty I on port 23 I can't and the putty disconnects directy.

 

Can you please help me restoring this "old" firmware" ?

 

Many thanks !

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