Hi,
i report the SV B01 3MP POE as functional.
Gateway (Raspi)
Digest
264 -> Note that the cam is setup to this parameter; my cam was set to 265 at beginning
G711
rtsp://…IP…:554/stream1 -> Echo5 can´t handle 3MP(stream0) set stream1 to VGA resolution
1024x576 -> 16:9 i haven´t try VGA for this setting.
Tags noaudio + proxy I havent tested more or less.

Please check the gateway logs - my gateway hang one time

@jwwhite This is an old thread. But I just got my SV3C camera working Monocle to Alexa.

I used rtsp://<ip>:554/stream0 for the URL

Authentication: DIGEST
Audio Codec: None
Tags: @proxy @noaudio

What finally fixed it for me was to login to the camera configuration, set the resolution to 1080P and save the profile and disable the audio

Hope this helps someone. Might work for other generic IP cameras too