Cisco 7600 SIP 200 Hardware Installation Guide - Page 110

5-Port Gigabit Ethernet SPA Overview Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters Table 3-37 SFP Module Specifications (continued) Specification Storage temperature range Supply Voltage range Description SFP-GE-S: -40 to 100 degrees C SFP-GE-L: -40 to 100 degrees C SFP-GE-Z: -40 to 85 degrees C SFP-GE-T: -40 to 85 degrees C SFP-GE-S: 3.0 to 3.6 V SFP-GE-L: 3.0 to 3.6 V SFP-GE-Z: 0 to 4.0 V SFP-GE-T: 3.1 to 3.5 V SFP-GE-S Modules The 1000BASE-SX (short wavelength) module operates on standard multimode fiber-optic link spans of up to 500m on 50/125um 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 will not operate correctly when coupled to multimode fiber, and it is not intended to be used in environments where 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 in-line optical attenuator in the link to avoid overloading the receiver. • Insert a 10-dB in-line 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). • Insert a 5-dB in-line 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 equal to or greater than 15.5 miles (25 km) but less than 31 miles (50 km). 3-64 Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide OL-5052-14