Cisco Catalyst 6500 Series Installation Manual page 120

Determining Cable Distances
Table 2-8 10-Gigabit Ethernet Fiber-Optic Transmission Specifications
Model
WS-X6501-10GEX4
4
WS-G6488 OIM
6
WS-G6483 OIM
1. 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. Refer to the 10-Gigabit Ethernet optical power specifications table to calculate the exact distances that the module supports
before you install the module. The exact distances supported by this module vary depending on the number of splices and
connectors in the fiber-optic cable.
3. Although dispersion-shifted fiber-optic cable helps to reduce the dispersion of the signal, attenuation of the signal still limits
signal distance to 31 miles (50 km).
4. Optical Interface Module (OIM). The WS-G6488 OIM is installed in the WS-X6502-10GE 10-Gigabit Ethernet Base
Module.
5. According to the IEEE 802.ae standard.
6. Optical Interface Module (OIM). The WS-G6483 OIM is installed in the WS-X6502-10GE 10-Gigabit Ethernet Base
Module.
7. According to the IEEE 802.ae standard. Requires a 5 dB 1550 nm fixed-loss attenuator for distances less than 20 km. The
exact distances supported by this module vary according to the number of splices and connectors in the fiber-optic cable
attached to the OIM.
Catalyst 6500 Series Switch Module Installation Guide
2-8
Wavelength
(nm) Fiber Type
1550 SMF
Dispersion-
shifted SMF
1310 SMF
Dispersion-
shifted SMF
1550 SMF
Dispersion-
shifted SMF
Chapter 2
Modal
1
Core Size Bandwidth
(Microns) (MHz/km)
8.3/9/10 –
3
8.3/9/10 –
8.3/9/10 –
3
8.3/9/10 –
8.3/9/10 –
8.3/9/10 –
Preparing for Installation
2
Cable Distance
6.2–31 mi
(10–50 km)
6.2–31 mi
(10–50 km)
5
6.56 ft–6.2 mi
(2 m–10 km)
5
6.56 ft–6.2 mi
(2 m–10 km)
7
6.56 ft–24.8 mi
(2 m–40 km)
7
6.56 ft–24.8 mi
(2 m–40 km)
78-15725-02