autovbox: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/autovbox - from package: isdn4k-utils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/autovbox - from package: isdnvboxclient

You may install the required package with command apt-get install {package}

Error in other languages:
autovbox: bevel nie gevind nie
autovbox: comandă negăsită
autovbox: comando não encontrado
autovbox: commande introuvable
autovbox: command not found
autovbox: käsku ei ole
autovbox: không tìm thấy lệnh
autovbox: komanda nerasta
autovbox: Kommando nicht gefunden.
autovbox: kommandot finns inte
autovbox: komut yok
autovbox: nie znaleziono polecenia
autovbox: níor aimsíodh an t-ordú
autovbox: no se encontró la orden
autovbox: no s'ha trobat l'ordre
autovbox: opdracht niet gevonden
autovbox: parancs nem található
autovbox: perintah tidak ditemukan
autovbox: príkaz nenájdený
autovbox: příkaz nenalezen
autovbox: команда не найдена
autovbox: командата не е открита
autovbox: 命令找不到
autovbox: コマンドが見つかりません