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Catalyst 2984G, 2948G-GE-TX, and 2980G Switch Hardware Installation Guide
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Chapter 4 Configuring the Gigabit Ethernet Ports
Installing, Removing, and Maintaining GBICs
GBIC Optical Power Characteristics
Table 4-3 provides the GBIC optical power characteristics.
Note For information about the Coarse Wave Division Multiplexing (CWDM), refer to
the Cisco CWDM GBIC and CWDM SFP Installation Note.
GBIC Cabling Restrictions
You must observe the following fiber-optic cabling restrictions when using
GBICs:
• The minimum cabling distance for 1000BASE-SX and 1000BASE-LX/LH
GBICs is 6.5 feet (2 meters).
• The maximum cabling distance for each GBIC type is listed in Table 4-2.
Table 4-3 GBIC Optical Power Characteristics
Parameter
1000BASE-SX
(WS-G5484)
1000BASE-LX/LH
(WS-G5486)
1000BASE-ZX
(WS-G5487)
Transmitter output power
(min/max)
0/–9.5 dBm –3/–9.5 dBm 0/4.77 dBm
Receiver maximum input
power
0 dBm –3 dBm –3 dBm
Receiver sensitivity –17 dBm –19 dBm –23 dBm
Channel insertion loss
50/125 micron
1
MMF
1. 1 micron (µ) equals 1 micrometer or 10
-6
meters
3.4 dBm 4.4 dBm –
62.5/125 micron MMF 3.2 dBm 6 dBm –
9/10 micron SMF – 6.5 dBm 21.5 dBm