Digital Diagnostics Monitoring (DDM) Functions

Qualification Criteria for Pluggable Transceiver Modules

Platform
Napatech SmartNIC
Content Type
Qualification Document

Test cases

This table describes the test cases concerning DDM functions.

Note: Bidirectional QSFP+ modules are not required to have sensors. Some SFP+/SFP modules have limited DDM functionality. A feature is only tested if it is supported by the device.
Test Case Description
Read temperature Verify that it is possible to read the QSFP28/CFP4/QSFP+/SFP28/SFP+/SFP temperature.
Read voltage Verify that the voltage sensor value can be read from the DDM data.
Read RX power Verify that the RX power sensor value can be read from the DDM data.
Read TX power Verify that the TX laser can be enabled (where applicable), and that the TX power sensor value read from the DDM data is larger than 0 when the laser is on.
Verify that the TX laser can be disabled (where applicable), and that the TX power sensor value read from the DDM data is 0 when the laser is off.