4: Port configuration
Wave Length
Indicates the nominal transmitter output wavelength at room temperature in nm.
Part number
Indicates the vendor part number or product name. This is a 16-byte field that contains ASCII characters padded on the
right with ASCII spaces (20h).
Serial number
Indicates the vendor serial number for the transceiver. This is a 16 character field that contains ASCII characters padded
on the right with ASCII spaces (20h).
Revision
Indicates the vendor’s product revision. This is a 16 character field that contains ASCII characters padded on the right
with ASCII spaces (20h).
SFP present
Indicates the presence of a recognized SFP.
Diagnostics
If bit 6 is set, address 92 is set indicating that digital diagnostic monitoring has been implemented, received power
monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring
will all be displayed.
Calibration
The values in this field are interpreted differently depending upon the option bits set at address 92.
• Internal: If bit 5 is set, the values are calibrated to absolute measurements, which should be interpreted according
to the convention “Internal Calibration”.
• External: If bit 4 is set, the values are A/D counts, which are converted into real units per the convention “External
Calibration”.
Thresholds
Additionally, alarm and warning thresholds must be written as specified in this document at locations 00 – 55 on 2 wire
serial address 1010001X (A2h).
Monitoring information
Temperature
Internally measured transceiver temperature. Temperature accuracy is vendor specific but must be better than 3 degrees
Celsius over specified operating temperature and voltage.
Laser bias current
Measured coupled TX output power. Accuracy is vendor specific but must be better than 3dB over specified operating
temperature and voltage. Data is assumed to be based on measurement of a laser monitor photodiode current. Data is
not valid when the transmitter is disabled.
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