After the Deb 10 install (did not try with deb 11) - I followed the install in existing -
Install from ASL Repository
As an alternative to installing the ASL image, you can install Debian 10 (or not supported 11) yourself and then add the ASL repo. This is the recommended procedure to install on a VM where a .iso cannot be uploaded. The DAHDI package can be finicky with newer kernels and this won’t work if the Linux headers don’t match the Linux kernel.
Install the ASL Repository
As root (or with sudo) run the following commands to install the ASL repo. Overwrite the keyring file if prompted.
apt update apt install curl gpg cd /tmp wget http://apt.allstarlink.org/repos/asl_builds/install-allstarlink-repository chmod +x install-allstarlink-repository ./install-allstarlink-repository
Install ASL
Next as root (or with sudo) run the following commands to install ASL.
apt -y install linux-headers-$(uname -r) apt -y install asl-asterisk apt -y install allstar-helpers apt -y install asl-dahdi-linux apt -y install asl-update-node-list