SPoE inductor for LTC9111

Question: The LTC9111 datasheet specifies an SPoE inductor with inductance of 68 uH (see Table 3 of datasheet). However, the EVAL-10BT1L-SMC-AZ shield board of the EVAL-LTC9111-AZ board has a MSD1278T-224KLB inductor with inductance of 220 uH. Which value inductor should be used? Answer: The datasheet has the latest recommendation. The demo board (which uses a 220uH inductor) was developed based on an earlier revision of the IEEE standard which was has since been relaxed to make the inductors more economical. The 68uH (which is noted in the datasheet) is better, smaller and cheaper.

What are the cables used to test EVAL-SPoE-KIT-AZ at 1km?

The EVAL-SPoE-KIT-AZ Evaluation Kit User Guide [Analog Devices Wiki] only includes Alpha Wire 6459 OR005 this is only used for short distance validation. To validate the EV kit to the rated 1km distance, we recommend using Helukabel 82836 cable. For more information on this, Please refer to 802.3cg that standard provides some guidance on cables, particularly the cable resistance per class.