Cisco 2948G Hardware Installation Guide - Page 79

GBIC Optical Power Characteristics, GBIC Cabling Restrictions

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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. Table 4-3 GBIC Optical Power Characteristics Parameter 1000BASE-SX (WS-G5484) Transmitter output power 0/-9.5 dBm (min/max) Receiver maximum input 0 dBm power Receiver sensitivity -17 dBm Channel insertion loss 50/125 micron1 MMF 3.4 dBm 62.5/125 micron MMF 3.2 dBm 9/10 micron SMF - 1. 1 micron (µ) equals 1 micrometer or 10-6 meters 1000BASE-LX/LH 1000BASE-ZX (WS-G5486) (WS-G5487) -3/-9.5 dBm 0/4.77 dBm -3 dBm -3 dBm -19 dBm -23 dBm 4.4 dBm 6 dBm 6.5 dBm - - 21.5 dBm 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. 78-6286-05 Catalyst 2984G, 2948G-GE-TX, and 2980G Switch Hardware Installation Guide 4-5

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4-5
Catalyst 2984G, 2948G-GE-TX, and 2980G Switch Hardware Installation Guide
78-6286-05
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