This object models a generic optical interface. It defines an {{object|Interface}} object that models a layer 1 optical interface that is capable of transporting Ethernet packets. For historical reasons, the data model definition is based on parts of {{bibref|G.988}}. However, it is not intended to model anything specific to IEEE PON or ITU-T PON technologies. Note that this object is not intended to model the optical transceiver either. Optical interface table (a stackable interface object as described in {{bibref|TR-181i2|Section 4.2}}). This table models physical optical interfaces. Enables or disables the optical interface. This parameter is based on ''ifAdminStatus'' from {{bibref|RFC2863}}. Current measurement of total downstream optical signal level. {{datatype|expand}} Valid values are -65.536 dBm (coded as -65536), to 65.534 dBm (coded as 65534) in 0.002 dB increments. This parameter is based on ''Optical signal level'' from {{bibref|G.988|Section 9.2.1}}. Optical level that is used to declare the downstream low received optical power alarm. {{datatype|expand}} Valid values are -127.5 dBm (coded as -127500) to 0 dBm (coded as 0) in 0.5 dB increments. The value -127500 indicates the device's internal policy. This parameter is based on ''Lower optical threshold'' from {{bibref|G.988|section 9.2.1}}. {{deprecated|2.15|because it is not intended for the device to raise an optical power alarm.}} {{obsoleted|2.17}} {{deleted|2.18}} Optical level that is used to declare the downstream high received optical power alarm. {{datatype|expand}} Valid values are -127.5 dBm (coded as -127500) to 0 dBm (coded as 0) in 0.5 dB increments. The value -127500 indicates the device's internal policy. This parameter is based on ''Upper optical threshold'' from {{bibref|G.988|section 9.2.1}}. {{deprecated|2.15|because it is not intended for the device to raise an optical power alarm.}} {{obsoleted|2.17}} {{deleted|2.18}} Current measurement of mean optical launch power. {{datatype|expand}} Valid values are -65.536 dBm (coded as -65536), to 65.534 dBm (coded as 65534) in 0.002 dB increments. This parameter is based on ''Transmit optical level'' from {{bibref|G.988|section 9.2.1}}. Minimum mean optical launch power that is used to declare the low transmit optical power alarm. {{datatype|expand}} Valid values are -63.5 dBm (coded as -63500) to +63.5 dBm (coded as 63500) in 0.5 dB increments. The value -63500 indicates the device's internal policy. This parameter is based on ''Lower transmit power threshold'' from {{bibref|G.988|section 9.2.1}}. {{deprecated|2.15|because it is not intended for the device to raise an optical power alarm.}} {{obsoleted|2.17}} {{deleted|2.18}} Maximum mean optical launch power that is used to declare the high transmit optical power alarm. {{datatype|expand}} Valid values are -63.5 dBm (coded as -63500) to +63.5 dBm (coded as 63500) in 0.5 dB increments. The value -63500 indicates the device's internal policy. This parameter is based on ''Upper transmit power threshold'' from {{bibref|G.988|section 9.2.1}}. {{deprecated|2.15|because it is not intended for the device to raise an optical power alarm.}} {{obsoleted|2.17}} {{deleted|2.18}}