I was hoping I'm using the right USB-RS232 adapter.
I've been using one lots of times now for configuring with the legacy configurator, but I hope it could also be used firmware updates.

I was hoping perhaps somebody here can give me an answer on this...

I'm currently using a Ugreen USB - RS232 adaptor for configuring (only the female variant) which worked fine so far for configuring when using the legacy configurator on Windows.

It is based on the Prolific PL2303 chipset as it seems.

#1 568.2mm, HD621, G91DH, 513, 511, DSP3100 , DSP33C , DSP33, 2x MJ Pro 50 MKI, M1500
#2 G68ADV, HD621, DSP3100, DSP33C, DSP33, 3x MJ Pro 50 MKII, Control 15, Vertex 2
#3 G61rsl, HD621, 596P, DSP7000, DSP5500HC, DSP33, 2x MJ Pro 50 MKII, M1500

Spare: , 2x 568.2mm, 562V.2, DSP33, Director, G55, M60.2, MS200,
Applied mods: NOS-SRx Filter by Mr. Apodizer