I have tryed to install the intercom on an Elvox 940A system,
it was an intercom in wich all commands where sent over the bus , like (ring, opend door ecc…)
and the audio instead is trasmitted analog on another wire.
I know the intercom is not officially supported on the compatibility tool but the specific model is present on the app side so i will try to give a chance.
I think that for the work of engineer team is hard because the intercom on the market may vary and also are a lot.
So i connected using wire SET C
on wire for DIGIBUS (digital serial line)
on wire for audio IN/OUT (Analog)
on wire for the reference (Common Ground)
I was surprised because after the initial setup the app was able to recognize the signal of CALL for the specific intercom, the door command was issued correctly both if i ring from one or another door, switching all correctly.
I was impressed also because the tech documentation for the digital protocol is very hard to find.
The issue started with the audio the level was to high and there was a big feedback on external units (like lasern effect)
I’ve played a lot with the volume control but definitivly was to high and was unable to compensate.
I’ve tryed to contact customer care but after a quick chek they respond that the intercom is not supported and they didn’t know if was supported in future.
I’m an Engineer and nothing can stop to make trials, so i started to play and i’ve found that using a resistor on audio end was able to reduce the signal amplitude, unoftunatly this is not a realible solution because is only a part of the work, is also needed to balance between speech in and speech out (Mic and speaker on the app settings)
Unfortunatly the trimming is not possible with “call in progress”
So what i ask is a support because i think that the effort is not so big and the best is to have on the app the possibility to
- Reduce overall the Audio signal
- Make the ability to balance Mic and Speaker with call in progress (this because with trial and error is very difficult to do)
I think this can help to fully integrate the ring Intercom and maybe can be useful also for other types of intercom that have similar issue.