vbcfx: 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/vbcfx - from package: voxbo

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