vbi: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/lib/voxbo/bin/vbi - from package: voxbo

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