B-5
Catalyst 6500 Series Ethernet Modules Installation Guide
OL-6265-03
Appendix B Pluggable Transceiver Modules
1-GB Transceivers
Table B-6
lists the fiber loss budgets for the GBIC transceivers.
1000BASE-LX/LH
(WS-G5486)
SC duplex
1310
MMF
4
SMF
62.5
50.0
50.0
G.652
5
500
400
500
—
1804 ft (550 m)
1804 ft (550 m)
1804 ft (550 m)
6.2 mi (10 km)
1000BASE-ZX
6
(WS-G5487)
SC duplex
1550
SMF
SMF
7
G.652
5
G.652
5
—
—
43.5 mi (70 km)
8
62.1 mi (100 km)
1.
The numbers given for multimode fiber-optic (MMF) cable refer to the core diameter.
2.
Cable distances are based on fiber loss. Additional factors, such as the number of splices and the optical quality of the fiber, can affect cabling
distances.
3.
Use with MMF only.
4.
When using an LX/LH GBIC transceiver with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord (CAB-GELX-625 or
equivalent) between the GBIC transceiver and the MMF cable on both the transmit and receive ends of the link. The mode-conditioning patch cord
is required for link distances less than 328 feet (100 m) or greater than 984 feet (300 m). The mode-conditioning patch cord prevents overdriving
the receiver for short lengths of MMF and reduces differential mode delay for long lengths of MMF.
5.
ITU-T G.652 SMF as specified by the IEEE 802.3z standard.
6.
Use with SMF only.
7.
Dispersion-shifted single-mode fiber-optic cable.
8.
The minimum link distance for ZX GBICs is 6.2 miles (10 km), when an 8-dB attenuator is installed at each end of the link. Without attenuators,
the minimum link distance is 24.9 miles (40 km).
Table B-5
GBIC Transceiver Module Cabling Specifications (continued)
GBIC Transceiver
Model and Product
Number
Interface
Connector
Nominal
Wavelength
(nm)
Network
Cable Type
Fiber Core
Size
1
(micron)
Modal Bandwidth
(MHz km)
Cable Distance
2
Table B-6
Fiber Loss Budgets for the 1-GB GBIC Transceivers
1-GB GBIC Transceiver
Product Number
Transmit (dBm)
Receive (dBm)
WS-G5484
(1000BASE-SX)
–3 (maximum)
–9.5 (minimum)
0 (maximum)
–17 (minimum)
WS-G5486
(1000BASE-LX/LH)
–3 (maximum)
–9.5 (minimum)
–3 (maximum)
–19 (minimum)
WS-G5487
(1000BASE-ZX)
5 (maximum)
0 (minimum)
–3 (maximum)
–23 (minimum)
1
1.
The 1000BASE-ZX GBIC transceiver provides a minimum optical power budget of
23 dB. To determine the supported link distance, you need to measure your cable plant
with an optical loss test set to verify that the optical loss of the cable plant (including
connectors and splices) is less than or equal to this value. The optical measurement
must be performed with a 1550 nanometer light source.
