Cisco Catalyst 6500 Series Installation Manual page 118

Determining Cable Distances
Table 2-6 Gigabit Ethernet Maximum Transmission Distances
GBIC Type Wavelength
(nm)
WS-G5483 –
Copper
WS-G5484 850
3
Optical SX
WS-G5486 1310
Optical
LX/LH
WS-G5487 1550
Optical ZX
1. The numbers given for multimode fiber-optic cable refer to the core diameter. For single-mode fiber-optic cable, 8.3 microns
refers to the core diameter. The 9-micron and 10-micron values refer to the mode-field diameter (MFD), which is the diameter
of the light-carrying portion of the fiber. This area consists of the fiber core plus a small portion of the surrounding cladding.
The MFD is a function of the core diameter, the wavelength of the laser, and the refractive index difference between the core
and the cladding.
2. Distances are based on fiber loss.
3. Use with MMF only.
4. When using an LX/LH GBIC with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord
(CAB-GELX-625 or equivalent) between the GBIC 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. Dispersion-shifted single-mode fiber-optic cable.
6. The minimum link distance for ZX GBICs is 6.2 miles (10 km) with an 8-dB attenuator installed at each end of the link.
Without attenuators, the minimum link distance is 24.9 miles (40 km).
Catalyst 6500 Series Switch Module Installation Guide
2-6
Copper/Fiber Core Size
Type (micron)
Category 5, –
5e, 6 UTP
MMF 62.5
62.5
50.0
50.0
4
MMF 62.5
50.0
50.0
SMF 8.3/9/10
SMF 8.3/9/10
5
SMF 8.3/9/10
Chapter 2
1
Modal Bandwidth
(MHz km)
–
160
200
400
500
500
400
500
–
–
–
Preparing for Installation
2
Cable Distance
328 ft (100 m)
722 ft (220 m)
902 ft (275 m)
1640 ft (500 m)
1804 ft (550 m)
1804 ft (550 m)
1804 ft (550 m)
1804 ft (550 m)
6.2 mi (10 km)
6
43.5 mi (70 km)
62.1 mi (100 km)
78-15725-02