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Chapter 1: Overview
50
When a slot has a standard SFP, only one LED of a pair is active. The
other LED is not used. The active LED is different depending on whether
the slot containing the transceiver is in the top or bottom row. When an
SFP transceiver is installed in a slot in the top row, the first LED is active
and the second inactive. When an SFP transceiver is installed in a slot in
the bottom row, the first LED is inactive and the second active. See
Figure 27.
L/A LED
Not Used
Figure 27. LEDs for the AT-SBx31GC40 Line Card, with SFP Transceivers
The LED states are described in Table 9.
Table 9. Transceiver Slot LEDs on the AT-SBx31GC40 Line Card
LED
State
Solid Green
The SFP transceiver or CSFP transceiver fiber
port has established a link with a network device.
Flashing
The SFP transceiver or CSFP transceiver fiber
L/A
Green
port is transmitting or receiving data.
This LED state can result from the following
Off
conditions:
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Port 0
Not used
Port 3
L/A LED
Description
The transceiver slot is empty.
The SFP transceiver or CSFP fiber port
has not established a link to a network
device.
The LEDs on the Ethernet line cards are
turned off. To turn on the LEDs, use the
eco-friendly button.
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