Figure 6: Sfp Link/Speed/Activity Leds On The At-X220-28Gs Switch; Table 3. Sfp Link/Activity Led Functional Descriptions - Allied Telesis AT-x220-28GS Installation Manual

Chapter 1: Overview
12
Figure 6. SFP Link/Speed/Activity LEDs on the AT-x220-28GS Switch
Upper (left) SFP LED
SFP slots
Table 3 describes the functions of the SFP Link/Speed/Activity LEDs:

Table 3. SFP Link/Activity LED functional descriptions

LED State
Off
Flashing
green
SFP Steady
green
Flashing
amber
Steady
amber
Lower (right) SFP LED
25 27
23
24 26 28
Description
The port on the SFP transceiver has not
established a link with an end node, or the
ecofriendly feature is enabled
Rx or Tx activities at 1000M
The SFP transceiver has established a
1000M link with a network device
Rx or Tx activities at 100M
The SFP transceiver has established a 100M
Link with a network device
CONSO