He estado buscando más información, ya que tengo que tirar la fibra hasta el mikrotik desde la ont.
He encontrado los distintos métodos :
SN authentication: The OLT detects the serial number (SN) reported by an ONT. If the SN is consistent with the OLT configuration, authentication is passed and the ONT goes online. This mode requires recording all ONT SNs. Hence, it is used to confirm auto discovery ONTs and is not applicable to adding ONTs in batches.
Password authentication: The OLT detects the password reported by an ONT. If the password is consistent with the OLT configuration, the ONT goes online normally. This mode requires planning ONT passwords and does not require manually recording ONT SNs. Hence, it is applicable to adding ONTs in batches. The password authentication provides two discovery modes: always-on and once-on.
always-on: After first password authentication is passed, no SN is allocated and password authentication is always used in subsequent authentications. This discovery mode is easy for future maintenance. In the always-on discovery mode, configuration is not required to be modified when an ONT is replaced and only the password is required. The always-on discovery mode has lower security. If other users know the password, the users will illegally have service permissions.
Once-on: After first password authentication is passed, an SN is automatically allocated and password+SN authentication is used in subsequent authentications. An ONT can go online only after the correct password and SN are entered. The once-on authentication mode has high security. After an ONT is replaced or the password is mistakenly changed, the ONT needs to be configured again, which requires more maintenance effort.
SN+password authentication: The OLT detects the password and SN reported by an ONT. If the password and SN are consistent with the OLT configuration, the ONT goes online normally. This authentication mode has the highest security but it requires manually recording ONT SNs.
LOID+CHECKCODE authentication: defined by a telecom operator. In this authentication mode, LOID has 24 bytes, and CHECKCODE has 12 bytes and is optional. Whether 24 bytes or 36 bytes are used for authentication depends on data planning, which is unified over the entire network. The OLT determines whether LOID+CHECKCODE reported by the ONT is the same as the configured one. If they are the same, the ONT authentication is passed. If they are different, the OLT obtains the ONT password and compares it with the last 10 bytes of the LOID. If they are the same, the ONT authentication is also passed. This operation is for compatibility with the ONTs using password authentication.
Entiendo que nosotros usamos sólo password porque podemos cambiar sin problemas el ont por otro, por ejemplo un hgu,y ahí cambiamos la Mac pero sigue funcionando siempre y cuando pongamos el idont.
Por lo que leo éste otro post de aquí :
From China, LOID not is Module Vendor SN,
Vendor SN in EEPROM A0H, Address 68~83 Byte, Size is 16 Byte,
Loid in EEPROM A2H, Address 190~213 Byte, Size is 24 Byte
Password for Loid in EEPROM A2H, Address 214~225 Byte, Size is 12 Byte
Your need wirte to EEPROM for change Loid