Michelle Konzack wrote: > Because my Portal is in a distance of 60m from the Serverbunker and I do > not like to install a seperated earth cable, I am now searching for an > IP/SIP based Interphone. Best would be with Video. > > Has someone experience with it and can suggest me a product? > > Note 1: We have currently -10°C on the Farm and it can go down > until -30°C (some years ago it was for one day -39°C), > which increase the requirements on the Interphone. > > Note 2: In 2017/2018 i used a Banana PI at a Sidele Interphone, > but the BPI gaved up at -5°C and the Siedele at -20°C.
By "Interphone", do you mean a local voice and/or video system that doesn't connect to the general Internet? As for your environmental requirements: does it have to operate at -40, or just survive it for a few hours before warming back up? Very few electronic devices are guaranteed to work below 0C. I would suggest building a small insulated box to hold your electronics, along with an incandescent lightbulb to provide both light and heat. For general voice use, I like the Polycom IP3xx series. Their video phones, however, are either very expensive or else consist of a voice phone with a USB camera glued to the top. -dsr-