One item that I need to mention is that regardless if I check the "Setup RTSP back-channel for talk support (PCM-U format)" on and save, the checkbox unchecks itself eventually. I believe the "U" stands for "Un-signed" but I'm not sure... It's on the "Network IP ca...

...and tis the user:

...and the BI Status and camera's audio settings:

Thanks for your lightening response!...
I have 11 printshots of 2 MB all. I'll try to post them if I can...
It looks it allows me only 3 files at a time:

Hi, I have recently bought from Amazon a 2-way PTZ camera with 30x optical zoom and H.265+ compression, among other specs (Outdoor 5MP PTZ IP POE Dome Security Camera 30x Optical Zoom Pan Tilt 250FT IR Night Vision Motion Detection Remote View RTSP Audio Support 4.5inch). Also I intend to purchase t...