How to identify specific on-board Ethernet LED lights information to differentiate between Speed and Link/Active status.

Any of the following Desktop systems:

• 3000 J100 (type 8252, 8253, 8254, 8255, 8256, 8453, 8454, 8455, 8456, 8457)
• 3000 J105 (type 8257, 8258, 8259, 8458, 8459, 8460)
• ThinkCentre A51 (type 8105, 8107, 8109, 8117, 8119, 8121, 8424, 8425)
• ThinkCentre A51p (type (8420, 8421, 8422, 8423, 8427)
• ThinkCentre A52 (type 8288, 8297, 8326, 8329, 8342, 8380, 8782, 8783, 8784, 8785, 8786, 8788)
• ThinkCentre E50 (type 8291, 8292, 8293, 8294, 8295, 8472, 8771, 8772, 8773, 8774, 8776, 8777, 8778, 8779, 9214, 9215, 9216, 9217, 9218, 9219)
• ThinkCentre E51 (type 8463, 8464, 8465, 8466, 8467, 8468)
• ThinkCentre M51 (type 8096, 8097, 8104, 8106, 8108, 8118, 8120, 8141, 8142, 8143, 8144, 8145, 8146)
• ThinkCentre S51 (type 8098, 8171, 8172, 8173)
  

The Speed LED (left side of desktop system when viewing from the rear), is green with Gigabit, Fast Ethernet (100M bit) and Ethernet (10M bit) connections.

The Link/Active LED (right side of desktop system when viewing from the rear), blinks yellow when there is an active link connection.