Hello,
Pls you connect with our engineer of representative office that he is responsible for your country, let he provide firmware of ONUs to you.
If you don't know who is our engineer of representative office, pls you talk me what country and operator are these ONUs used and what are your contact information( for example: email or telephone)?
We will inform engineer of representative office that let he connect with you and provide firmware of ONUs to you.
Thanks!