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Catalyst 2984G, 2948G-GE-TX, and 2980G Switch Hardware Installation Guide
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Chapter4 Configuring the Gigabit Etherne t Ports Installing, Removing, and Maintaining GBICs
GBIC Optical Power Characteristics
Table 4 -3 provides the GBIC optical power charact eris tics .
Note For information about the Coarse Wave Division Multip lexing (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 .
Table4-3 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 micron1 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