Cisco CRS-1 - Carrier Routing System Router Hardware Installation Manual page 64

10-Port Gigabit Ethernet SPA Overview
Table 3-25
Specification
Wavelength
Cabling distance (maximum)
Operating case temperature
range
Storage temperature range
Supply voltage range
SFP-GE-S Modules
The 1000BASE-SX (short-wavelength) module operates on standard multimode fiber-optic link spans
of up to 500 m on 50/125um multimode fiber (MMF) and 300 m on 62.5/125um MMF.
SFP-GE-L Modules
The 1000BASE-LX/LH (long-wavelength/long-haul) module interfaces fully comply with the
IEEE 802.3z 1000BASE-LX standard. However, their higher optical quality allows them to reach
6.2 miles (10 km) over single-mode fiber (SMF) versus the 3.1 miles (5 km) specified in the standard.
SFP-GE-Z Modules
The 1000BASE-ZX (extended-wavelength) module operates on ordinary single-mode fiber-optic link
spans of up to 49.7 miles (80 km). Link spans of up to 62.1 miles (100 km) are possible using premium
single-mode fiber or dispersion-shifted single-mode fiber. (Premium single-mode fiber has a lower
attenuation per unit length than ordinary single-mode fiber; dispersion-shifted single-mode fiber has
both lower attenuation and less dispersion.)
The 1000BASE-ZX module must be coupled to single-mode fiber-optic cable, which is the type of cable
typically used in long-haul telecommunications applications. The 1000BASE-ZX module does not
operate correctly when coupled to multimode fiber, and it is not intended to be used in environments in
which multimode fiber is frequently used (for example, building backbones or horizontal cabling).
The 1000BASE-ZX module is intended to be used as a Physical Medium Dependent (PMD) component
for Gigabit Ethernet interfaces found on various switch and router products. It operates at a signaling
rate of 1250 Mbaud, transmitting and receiving 8B/10B encoded data.
When shorter lengths of single-mode fiber are used, it may be necessary to insert an inline optical
attenuator in the link to avoid overloading the receiver. Use the following guidelines:
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Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
3-38
10-Port Gigabit Ethernet SFP Module Specifications
Insert a 10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on
the 1000BASE-ZX module at each end of the link whenever the fiber-optic cable span is less than
15.5 miles (25 km).
Chapter 3
Description
SFP-GE-S: 770 to 860 nm
SFP-GE-L: 1270 to 1355 nm
SFP-GE-Z: 1500 to 1580 nm
SFP-GE-S: 500 m on 50/125um MMF; 300 m on 62.5/125um MMF
SFP-GE-L: 6.2 miles (10 km)
SFP-GE-Z: 49.7 miles (80 km)
SFP-GE-S: 23 to 185 degrees F (–5 to 85 degrees C)
SFP-GE-L: 23 to 185 degrees F (–5 to 85 degrees C)
SFP-GE-Z: 23 to 185 degrees F (–5 to 85 degrees C)
SFP-GE-S: –40 to 185 degrees F (–40 to 85 degrees C)
SFP-GE-L: –40 to 185 degrees F (–40 to 85 degrees C)
SFP-GE-Z: –40 to 185 degrees F (–40 to 85 degrees C)
SFP-GE-S: 3.1 to 3.5 V
SFP-GE-L: 3.1 to 3.5 V
SFP-GE-Z: 3.1 to 3.5 V
Overview: Cisco CRS-1 Shared Port Adapters
OL-17439-01