pi@raspberrypi:~ $ wget https://downloads-global.3cx.com/downloads/misc/d10pi.zip; sudo bash d10pi.zip
--2022-03-02 12:41:26-- https://downloads-global.3cx.com/downloads/misc/d10pi.zip
Resolving downloads-global.3cx.com (downloads-global.3cx.com)... 104.22.14.119, 104.22.14.119
Connecting to downloads-global.3cx.com (downloads-global.3cx.com)|104.22.14.119|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2856 (2.8K) [application/x-zip-compressed]
Saving to: ‘d10pi.zip’
d10pi.zip 100%[===================>] 2.79K --.-KB/s in 0.001s
2022-03-02 12:41:27 (2.69 MB/s) - ‘d10pi.zip’ saved [2856/2856]
--2022-03-02 12:41:27-- http://downloads-global.3cx.com/downloads/3cxpbx/public.key
Resolving downloads-global.3cx.com (downloads-global.3cx.com)... 104.22.14.119, 104.22.14.119
Connecting to downloads-global.3cx.com (downloads-global.3cx.com)|104.22.14.119|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1179 (1.2K) [application/pkcs8]
Saving to: ‘STDOUT’
- 100%[===================>] 1.15K --.-KB/s in 0s
2022-03-02 12:41:27 (36.6 MB/s) - written to stdout [1179/1179]
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
OK
deb http://downloads-global.3cx.com/downloads/debian bullseye main
deb [arch=armhf] http://downloads-global.3cx.com/downloads/debian bullseye-testing main
Hit:1 http://archive.raspberrypi.org/debian bullseye InRelease
Hit:2 http://raspbian.raspberrypi.org/raspbian bullseye InRelease
Ign:3 http://downloads-global.3cx.com/downloads/debian bullseye-testing InRelease
Ign:4 http://downloads-global.3cx.com/downloads/debian bullseye InRelease
Err:5 http://downloads-global.3cx.com/downloads/debian bullseye-testing Release
404 Not Found [IP: 104.22.14.119 80]
Err:6 http://downloads-global.3cx.com/downloads/debian bullseye Release
404 Not Found [IP: 104.22.14.119 80]
Reading package lists... Done
E: The repository 'http://downloads-global.3cx.com/downloads/debian bullseye-testing Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://downloads-global.3cx.com/downloads/debian bullseye Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
OK
connecting https://loyalshipper.tx.3cx.us
Ign:1 http://downloads-global.3cx.com/downloads/debian bullseye InRelease
Err:2 http://downloads-global.3cx.com/downloads/debian bullseye Release
404 Not Found [IP: 172.67.39.236 80]
Reading package lists... Done
E: The repository 'http://downloads-global.3cx.com/downloads/debian bullseye Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
error: Cannot install the 3cxsbc package