22
Front panel
Figure 17
Front panel
(1) Captive screw
(2) SFP port
(3) Ejector lever
(4) SFP port carrier signal LED (LINK/ACT)
LEDs
Table 21
LED description
LED Status
Description
SFP
GE-1000Base-
X
LINK/ACT (0 to
3)
(Green)
Off
No link is present.
On
A 1000 Mbps link is present.
Flashing
Data is being transmitted or received at 1000
Mbps.
SFP POS-155M
LINK/ACT/LP/
AL (4 to 7)
(Yellow/Green)
Steady green
A 155.52 Mbps link is present.
Flashing green
Data is being transmitted or received.
Steady yellow
A loopback exists.
Flashing yellow
An alarm has occurred.
Off
No link is present.
Interface specifications
Table 22
Ethernet fiber port specifications
Item Specification
Connector type
SFP
Number of interfaces
4
Interface standards
802.3, 802.3u, 802.3ab
Frame format
Ethernet_II
Ethernet_SNAP
Optical
transmit
power
Type Short
distance
Medium
distance
Long distance
Long
distance
Ultra-long
distance
Min.
–9.5 dBm
–9 dBm
–2 dBm
–4 dBm
–4 dBm
Max.
0 dBm
–3 dBm
5 dBm
1 dBm
2 dBm
Receiving sensitivity
–17 dBm
–20 dBm
–23 dBm
–21 dBm –22 dBm
