Specifications

9
Installing the GBIC, SFP, and XFP Optics Modules in Cisco ONS Platforms
78-11404-05
GBIC Description and Specifications
DWDM and CWDM GBICs
DWDM GBICs (15454-GBIC-xx.x and 15454E-GBIC-xx.x) and CWDM GBICs (15454-GBIC-xxxx
and 15454E-GBIC-xxxx) are both wavelength division multiplexing (WDM) technologies that operate over
single-mode fibers with SC connectors. Cisco CWDM GBIC technology uses a 20 nm wavelength grid and
Cisco ONS 15454 DWDM GBIC technology uses a 0.8 nm wavelength grid. CTC displays the specific
wavelengths of the installed CWDM or DWDM GBICs. DWDM wavelengths are spaced closer together
and require more precise lasers than CWDM. The DWDM spectrum allows for optical signal amplification.
ONS-GX-2FC-SML=
Long Reach
1310 nm
4
9 micron SMF 10 km (6.2 miles)
50.0 micron SMF
62.5 micron SMF
225 m (738 ft) (with a mode
conditioning patch cord for
transmitter)
1. The 15454-GC-GE-ZX operates on SMF optic link spans of up to 80 km in length. Link spans of up to 100 km are possible
using premium SMF or dispersion shifted SMF. When shorter distances of SMF are used, it may be necessary to insert an
in-line optical attenuator in the link, to avoid overloading the receiver. For fiber-optic cable spans less than 25 km, insert a
10 dB in-line optical attenuator between the fiber-optic cable plant and the receiving port on the 15454-GC-GE-ZX at each
end of the link. For fiber-optic cable spans equal to or greater than 25 km and less than 50 km, insert a 5 dB in-line optical
attenuator between the fiber-optic cable plant and the receiving port on the 15454-GC-GE-ZX at the end of the link.
2. Typical loss on a 1550 nm wavelength SMF is .3 dB/km.
3. 100 km cable distance requires dispersion-shifted SMF (15454-GC-GE-ZX)
4. Typical loss on a 1310 nm wavelength SMF is .50 dB/km.
Table 4 Multimode Fiber GBIC Port Cabling Specifications
GBIC Wavelength Fiber Type
1
1. The numbers given for MMF refer to the core diameter. For SMF, 8.3 micron 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 and 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.
Cable Distance
15454-GC-GE-SX=
Short Reach
850 nm 62.5 micron MMF 220 m (722 ft)
275 m (902 ft)
50.0 micron MMF 500 m (1640 ft)
550 m (1804 ft)
15454-GC-GE-LX=
Long Reach
1310 nm 62.5 micron MMF
2
2. 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.
550 m (1804 ft)
50.0 micron MMF 550 m (1804 ft)
ONS-GX-2FC-MMI=
Short Reach
850 nm 50.0 micron MMF 550 m (1804 ft)
62.5 micron MMF 300 m (984.3 ft)
Table 3 Single-Mode Fiber GBIC Port Cabling Specifications (continued)
GBIC Wavelength Fiber Type Cable Distance