Re: Interphone with SIP-Protocol
- Date: Thu, 29 Nov 2018 05:48:03 -0500
- From: Dan Ritter <dsr@xxxxxxxxxxxxxxxx>
- Subject: Re: Interphone with SIP-Protocol
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.